business calculator

Margin Calculator — Calculate Profit Margin & Gross Margin Instantly

Calculate profit margin, gross margin, revenue, and cost instantly with step-by-step work. Enter any two values and get the third.

Formula Verified by Dr. Marcus Sterling, PhD

Quick actions: Save inputs, view saved runs, print, share, or export results

Saved Runs

Inputs

Calculation Mode

Cost (what you paid)$

Revenue (selling price)$

Step-by-Step Calculation

Profit = Revenue − Cost$50.00 − $30.00 = $20.00

Margin % = (Profit ÷ Revenue) × 10040.00%

Markup % = (Profit ÷ Cost) × 10066.67%

Results

Profit Margin

40.00%

Markup Equivalent66.67%

Profit$20.00

Cost$30.00

Revenue$50.00

Margin vs Markup

Margin

40.00%

% of revenue

Markup

66.67%

% of cost

Bookmark this margin calculator

Save this page to quickly price products, check profitability, and compare margins across your product range.

Formula

Margin Formula

Margin% = (Profit ÷ Revenue) × 100   ·   Revenue = Cost ÷ (1 − Margin%)   ·   Cost = Revenue × (1 − Margin%)

Margin and markup both describe profit, but margin uses revenue (selling price) as the denominator while markup uses cost.

Step by step

How the calculation works

1Select the calculation mode: Find Margin %, Find Revenue, or Find Cost.
2Enter the known values for your selected mode.
3Review profit margin, markup equivalent, and profit side by side.

Related guides

Learn more about this calculation

Guide

Profit Margin: Formulas, Examples, and Calculator Guide

Calculate gross, operating, and net profit margins, understand margin versus markup, and use each result to make better pricing and cost decisions.

Guide

Discount, Markup, and Margin: A Practical Pricing Guide

Calculate sale price, markup, and margin, then test how a discount changes unit profit, required sales volume, and the economics of a promotion.

How to understand and use this calculator

Quick Answer

What is profit margin? Profit margin is the percentage of revenue that remains as profit after deducting costs. It shows how much profit you make for every dollar of revenue.

Formula:

Margin = (Revenue − Cost) ÷ Revenue × 100

Simple example: Cost = $30, Revenue = $50.

Profit: $50 − $30 = $20
Margin: ($20 ÷ $50) × 100 = 40%

Key formulas:

Margin % = (Revenue − Cost) ÷ Revenue × 100
Revenue = Cost ÷ (1 − Margin %)
Cost = Revenue × (1 − Margin %)

Quick reference:

40% margin = $20 profit on $50 revenue
50% margin = $50 profit on $100 revenue
20% margin = $20 profit on $100 revenue

Use the Margin Calculator

To use the gross margin calculator:

1. Choose what you want to find — margin %, revenue, or cost.

2. Enter the two values you already know.

3. Review the profit, margin percentage, and step-by-step work.

Example input: Cost = $30.00, Revenue = $50.00.

Output:

Profit = $20.00
Margin Percentage = 40%
Step-by-step work: Profit = $50 − $30 = $20 → Margin = ($20 ÷ $50) × 100 = 40%

Revenue from cost and margin: Cost = $30.00, Desired Margin = 40%.

Required Revenue = $50.00
Profit = $20.00
Step-by-step work: Revenue = $30 ÷ (1 − 0.40) = $50

What is Profit Margin?

Profit margin is a measure of profitability. It tells you what percentage of your revenue is profit after covering costs. It's one of the most important metrics for any business.

The simple formula: Margin = (Revenue − Cost) ÷ Revenue × 100

Example: You sell a product for $100 (revenue). It cost you $60 (cost). Your profit is $40. Your margin is ($40 ÷ $100) × 100 = 40%.

Why margin matters:

Profitability measure — shows how efficient your business is.
Comparison tool — compare performance across products or time.
Pricing guide — helps you set prices that achieve profit goals.
Investor metric — investors look at margin to assess business health.
Operational efficiency — higher margins often mean better cost control.

Types of margin:

Gross margin: profit after direct costs (COGS).
Operating margin: profit after operating expenses.
Net margin: profit after all expenses (the bottom line).

This calculator focuses on gross margin — the most fundamental measure of profitability. Need operating or net margin instead? Try the Operating Margin & EBIT Calculator.

The Profit Margin Formula

The profit margin formula is simple and essential for any business.

Formula: Margin % = (Revenue − Cost) ÷ Revenue × 100

Where:

Revenue = selling price (what you charge customers)
Cost = cost of goods sold (what you paid)
Profit = Revenue − Cost

Expanded formulas:

Margin Percentage: (Revenue − Cost) ÷ Revenue × 100
Revenue: Cost ÷ (1 − Margin % ÷ 100)
Cost: Revenue × (1 − Margin % ÷ 100)
Profit: Revenue − Cost

Example using the formulas: Cost = $30, Revenue = $50. Profit = $50 − $30 = $20. Margin = ($20 ÷ $50) × 100 = 40%.

How to Calculate Margin — Step by Step

Learning how to calculate margin is essential for any business owner. Here's the step-by-step process.

Step 1: Identify your cost (COGS) — what you paid to acquire or produce the product. Example: you bought a product for $30.

Step 2: Identify your revenue (selling price) — what you charge your customers. Example: you sell the product for $50.

Step 3: Calculate your profit: Profit = Revenue − Cost = $50 − $30 = $20.

Step 4: Divide profit by revenue: $20 ÷ $50 = 0.4.

Step 5: Multiply by 100 to get the percentage: 0.4 × 100 = 40%.

Answer: Your profit margin is 40%

More examples:

Cost $30, Revenue $50 → Profit $20, Margin 40%
Cost $60, Revenue $100 → Profit $40, Margin 40%
Cost $40, Revenue $80 → Profit $40, Margin 50%
Cost $70, Revenue $100 → Profit $30, Margin 30%
Cost $80, Revenue $160 → Profit $80, Margin 50%

How to Find Revenue from Cost and Margin

If you know your cost and desired margin, here's how to find the revenue you need.

Formula: Revenue = Cost ÷ (1 − Margin % ÷ 100)

Step-by-step example: Cost = $30, Margin = 40%.

Step 1: Convert margin to decimal: 40% ÷ 100 = 0.40.

Step 2: Subtract from 1: 1 − 0.40 = 0.60.

Step 3: Divide cost by this number: $30 ÷ 0.60 = $50.

Answer: You need to sell for $50 to achieve a 40% margin

More examples:

Cost $30, Desired Margin 40% → Required Revenue $50.00
Cost $60, Desired Margin 40% → Required Revenue $100.00
Cost $40, Desired Margin 50% → Required Revenue $80.00
Cost $70, Desired Margin 30% → Required Revenue $100.00
Cost $80, Desired Margin 50% → Required Revenue $160.00

How to Find Cost from Revenue and Margin

If you know your revenue and desired margin, here's how to find the maximum cost you can pay.

Formula: Cost = Revenue × (1 − Margin % ÷ 100)

Step-by-step example: Revenue = $50, Margin = 40%.

Step 1: Convert margin to decimal: 40% ÷ 100 = 0.40.

Step 2: Subtract from 1: 1 − 0.40 = 0.60.

Step 3: Multiply revenue by this number: $50 × 0.60 = $30.

Answer: Your maximum cost should be $30 to achieve a 40% margin

More examples:

Revenue $50, Desired Margin 40% → Maximum Cost $30.00
Revenue $100, Desired Margin 40% → Maximum Cost $60.00
Revenue $80, Desired Margin 50% → Maximum Cost $40.00
Revenue $100, Desired Margin 30% → Maximum Cost $70.00
Revenue $160, Desired Margin 50% → Maximum Cost $80.00

Gross Margin vs Net Margin — What's the Difference?

Feature comparison:

Definition: Gross margin — profit after direct costs (COGS). Net margin — profit after ALL expenses.
Includes: Gross margin — only cost of goods sold. Net margin — all expenses (rent, wages, taxes, and more).
Formula: Gross margin — (Revenue − COGS) ÷ Revenue × 100. Net margin — (Revenue − Total Expenses) ÷ Revenue × 100.
What it shows: Gross margin — product-level profitability. Net margin — overall business profitability.
When to use: Gross margin — pricing decisions. Net margin — overall business health.

Example: Revenue $100,000, COGS (direct costs) $40,000, Operating Expenses (rent, wages, and more) $30,000, Total Expenses $70,000.

Gross Margin: ($100,000 − $40,000) ÷ $100,000 = 60%
Net Margin: ($100,000 − $70,000) ÷ $100,000 = 30%

Key insight: gross margin shows product profitability. Net margin shows overall business profitability after all costs. This calculator computes gross margin — for net margin including operating expenses, try the Operating Margin & EBIT Calculator.

Margin vs Markup — What's the Difference?

This is one of the most common confusions in business pricing. Let's clear it up.

Feature comparison:

Definition: Margin — % of revenue that is profit. Markup — % added to cost.
Formula: Margin — (Revenue − Cost) ÷ Revenue × 100. Markup — (Revenue − Cost) ÷ Cost × 100.
Base: Margin — revenue (selling price). Markup — cost (what you paid).
Value: Margin is always lower than markup. Markup is always higher than margin.
When to use: Margin — profitability analysis. Markup — setting prices.

Example with $30 cost, $50 revenue:

Profit: $50 − $30 = $20
Margin: ($20 ÷ $50) × 100 = 40%
Markup: ($20 ÷ $30) × 100 = 66.7%

Key observation: the same transaction yields a 40% margin and a 66.7% markup. Margin is always lower than markup.

When to use each: pricing products → markup. Analyzing profitability → margin. Financial reporting → margin. Comparing products → both.

Conversion formulas:

Margin = Markup ÷ (1 + Markup)
Markup = Margin ÷ (1 − Margin)

The calculator above shows both figures side by side automatically. For a markup-first view, try the Markup Calculator.

How to Calculate Margin in Excel

You can also calculate margin in Excel.

Method 1 — Basic margin calculation:

Enter Cost in cell A1: 30
Enter Revenue in cell B1: 50
Calculate Profit in C1: =B1-A1 → 20
Calculate Margin in D1: =C1/B1 → 0.4
Format as percentage: right-click → Format Cells → Percentage

Method 2 — Finding revenue from cost and margin:

Enter Cost in cell A1: 30
Enter Desired Margin in cell B1: 40%
Calculate Revenue in C1: =A1/(1-B1) → 50

Method 3 — Finding cost from revenue and margin:

Enter Revenue in cell A1: 50
Enter Desired Margin in cell B1: 40%
Calculate Cost in C1: =A1*(1-B1) → 30

Pro tip: use conditional formatting to highlight products with low margins (for example, red for margins below 20%).

What is a Good Profit Margin?

A "good" profit margin varies by industry. Here are general guidelines:

Below 5%: Poor — risky, little room for error.
5-10%: Average — acceptable for many industries.
10-20%: Good — healthy profitability.
20%+: Excellent — strong profitability.

Industry averages (gross margin):

Retail (Grocery): 20-30%
Retail (Clothing): 40-60%
Restaurants: 60-70%
Software: 80-90%
Manufacturing: 30-50%
Consulting: 50-80%
Construction: 20-40%
Healthcare: 40-60%

Note: these are gross margins. Net margins are typically much lower after all expenses.

Factors affecting margin: industry competition, pricing strategy, cost control, brand positioning, economies of scale.

Common Margin Calculation Mistakes

Confusing margin with markup. Mistake: using the markup formula for margin. Fix: margin = profit/revenue, markup = profit/cost.
Forgetting to convert percentage to decimal. Mistake: using 40 instead of 0.40 in formulas. Fix: always divide the percentage by 100.
Using the wrong base for calculation. Mistake: dividing profit by cost instead of revenue. Fix: margin is always a % of revenue.
Not including all costs. Mistake: only counting direct costs, ignoring overhead. Fix: include all relevant costs.
Confusing gross and net margin. Mistake: using gross margin when net margin is needed. Fix: understand which margin you need.
Rounding too early. Mistake: rounding before the final calculation. Fix: keep precision until the end.
Not checking the answer. Mistake: assuming the calculation is correct. Fix: verify by plugging back into the formula.
Forgetting to update when costs change. Mistake: keeping the same price when costs go up. Fix: review pricing regularly.

What This Calculator Can and Cannot Do

This calculator CAN help with:

Calculating profit margin percentage
Finding revenue from cost and margin
Finding cost from revenue and margin
Calculating profit
Gross margin calculations
Showing the equivalent markup percentage alongside every margin result
Business pricing decisions and profitability analysis

This calculator CANNOT do:

Calculate net margin including operating expenses and taxes — use the Operating Margin & EBIT Calculator
Account for taxes automatically
Replace professional financial advice
Handle multiple products with different margins at once

Final Summary

A margin calculator is essential for any business owner, entrepreneur, or student learning business math. Understanding how to calculate profit margin — and knowing the difference between margin and markup — is fundamental to profitability.

Remember the key formulas:

Margin %: (Revenue − Cost) ÷ Revenue × 100
Revenue: Cost ÷ (1 − Margin %)
Cost: Revenue × (1 − Margin %)
Profit: Revenue − Cost

Quick reference:

40% margin = $20 profit on $50 revenue
50% margin = $50 profit on $100 revenue
20% margin = $20 profit on $100 revenue

Margin vs Markup: Margin = % of revenue (lower). Markup = % of cost (higher).

Start calculating now! Just enter your values above and get instant results — completely free.

Related concepts

Gross Margin

Profit after direct costs (COGS) only — the most fundamental measure of product-level profitability.

Net Margin

Profit after ALL expenses, including rent, wages, and taxes — the bottom-line measure of overall business health.

COGS

Cost of Goods Sold — all costs to acquire or produce the product, including materials, labor, and shipping.

Frequently Asked Questions

What is a margin calculator?+

A margin calculator helps you calculate profit margin, revenue, or cost. Enter any two values and get the third instantly.

What is the profit margin formula?+

The profit margin formula is: Margin % = (Revenue − Cost) ÷ Revenue × 100.

How do you calculate profit margin?+

To calculate profit margin, subtract cost from revenue to get profit, then divide profit by revenue and multiply by 100.

What is the difference between margin and markup?+

Margin is calculated as a percentage of revenue. Markup is calculated as a percentage of cost. Margin is always lower than markup for the same transaction.

How do I find revenue from cost and margin?+

Use the formula: Revenue = Cost ÷ (1 − Margin % ÷ 100). Example: $30 ÷ (1 − 0.40) = $50.

How do I find cost from revenue and margin?+

Use the formula: Cost = Revenue × (1 − Margin % ÷ 100). Example: $50 × (1 − 0.40) = $30.

What is a good profit margin?+

Generally: below 5% is poor, 5-10% is average, 10-20% is good, 20%+ is excellent. It varies by industry.

What is the difference between gross margin and net margin?+

Gross margin is profit after direct costs (COGS). Net margin is profit after ALL expenses (rent, wages, taxes, and more).

How do I calculate margin in Excel?+

Use the formula: =(Revenue − Cost) / Revenue. Example: =(B1-A1)/B1. Format the result as a percentage.

What is the margin calculation formula?+

The margin calculation formula is: Margin % = (Revenue − Cost) ÷ Revenue × 100.

What is net margin calculation?+

Net margin calculation is: Net Margin % = (Revenue − Total Expenses) ÷ Revenue × 100.

Can margin be over 100%?+

No, margin cannot be over 100% because it's a percentage of revenue. The maximum margin is 100% (if cost is $0).

What if my margin is negative?+

A negative margin means you're losing money on each sale. Your costs exceed your revenue.

Is this margin calculator free?+

Yes — completely free with no registration required.

How to understand and use this calculator

Quick Answer

What is profit margin? Profit margin is the percentage of revenue that remains as profit after deducting costs. It shows how much profit you make for every dollar of revenue.

Formula:

Margin = (Revenue − Cost) ÷ Revenue × 100

Simple example: Cost = $30, Revenue = $50.

Profit: $50 − $30 = $20
Margin: ($20 ÷ $50) × 100 = 40%

Key formulas:

Margin % = (Revenue − Cost) ÷ Revenue × 100
Revenue = Cost ÷ (1 − Margin %)
Cost = Revenue × (1 − Margin %)

Quick reference:

40% margin = $20 profit on $50 revenue
50% margin = $50 profit on $100 revenue
20% margin = $20 profit on $100 revenue

Use the Margin Calculator

To use the gross margin calculator:

1. Choose what you want to find — margin %, revenue, or cost.

2. Enter the two values you already know.

3. Review the profit, margin percentage, and step-by-step work.

Example input: Cost = $30.00, Revenue = $50.00.

Output:

Profit = $20.00
Margin Percentage = 40%
Step-by-step work: Profit = $50 − $30 = $20 → Margin = ($20 ÷ $50) × 100 = 40%

Revenue from cost and margin: Cost = $30.00, Desired Margin = 40%.

Required Revenue = $50.00
Profit = $20.00
Step-by-step work: Revenue = $30 ÷ (1 − 0.40) = $50

What is Profit Margin?

Profit margin is a measure of profitability. It tells you what percentage of your revenue is profit after covering costs. It's one of the most important metrics for any business.

The simple formula: Margin = (Revenue − Cost) ÷ Revenue × 100

Example: You sell a product for $100 (revenue). It cost you $60 (cost). Your profit is $40. Your margin is ($40 ÷ $100) × 100 = 40%.

Why margin matters:

Profitability measure — shows how efficient your business is.
Comparison tool — compare performance across products or time.
Pricing guide — helps you set prices that achieve profit goals.
Investor metric — investors look at margin to assess business health.
Operational efficiency — higher margins often mean better cost control.

Types of margin:

Gross margin: profit after direct costs (COGS).
Operating margin: profit after operating expenses.
Net margin: profit after all expenses (the bottom line).

This calculator focuses on gross margin — the most fundamental measure of profitability. Need operating or net margin instead? Try the Operating Margin & EBIT Calculator.

The Profit Margin Formula

The profit margin formula is simple and essential for any business.

Formula: Margin % = (Revenue − Cost) ÷ Revenue × 100

Where:

Revenue = selling price (what you charge customers)
Cost = cost of goods sold (what you paid)
Profit = Revenue − Cost

Expanded formulas:

Margin Percentage: (Revenue − Cost) ÷ Revenue × 100
Revenue: Cost ÷ (1 − Margin % ÷ 100)
Cost: Revenue × (1 − Margin % ÷ 100)
Profit: Revenue − Cost

Example using the formulas: Cost = $30, Revenue = $50. Profit = $50 − $30 = $20. Margin = ($20 ÷ $50) × 100 = 40%.

How to Calculate Margin — Step by Step

Learning how to calculate margin is essential for any business owner. Here's the step-by-step process.

Step 1: Identify your cost (COGS) — what you paid to acquire or produce the product. Example: you bought a product for $30.

Step 2: Identify your revenue (selling price) — what you charge your customers. Example: you sell the product for $50.

Step 3: Calculate your profit: Profit = Revenue − Cost = $50 − $30 = $20.

Step 4: Divide profit by revenue: $20 ÷ $50 = 0.4.

Step 5: Multiply by 100 to get the percentage: 0.4 × 100 = 40%.

Answer: Your profit margin is 40%

More examples:

Cost $30, Revenue $50 → Profit $20, Margin 40%
Cost $60, Revenue $100 → Profit $40, Margin 40%
Cost $40, Revenue $80 → Profit $40, Margin 50%
Cost $70, Revenue $100 → Profit $30, Margin 30%
Cost $80, Revenue $160 → Profit $80, Margin 50%

How to Find Revenue from Cost and Margin

If you know your cost and desired margin, here's how to find the revenue you need.

Formula: Revenue = Cost ÷ (1 − Margin % ÷ 100)

Step-by-step example: Cost = $30, Margin = 40%.

Step 1: Convert margin to decimal: 40% ÷ 100 = 0.40.

Step 2: Subtract from 1: 1 − 0.40 = 0.60.

Step 3: Divide cost by this number: $30 ÷ 0.60 = $50.

Answer: You need to sell for $50 to achieve a 40% margin

More examples:

Cost $30, Desired Margin 40% → Required Revenue $50.00
Cost $60, Desired Margin 40% → Required Revenue $100.00
Cost $40, Desired Margin 50% → Required Revenue $80.00
Cost $70, Desired Margin 30% → Required Revenue $100.00
Cost $80, Desired Margin 50% → Required Revenue $160.00

How to Find Cost from Revenue and Margin

If you know your revenue and desired margin, here's how to find the maximum cost you can pay.

Formula: Cost = Revenue × (1 − Margin % ÷ 100)

Step-by-step example: Revenue = $50, Margin = 40%.

Step 1: Convert margin to decimal: 40% ÷ 100 = 0.40.

Step 2: Subtract from 1: 1 − 0.40 = 0.60.

Step 3: Multiply revenue by this number: $50 × 0.60 = $30.

Answer: Your maximum cost should be $30 to achieve a 40% margin

More examples:

Revenue $50, Desired Margin 40% → Maximum Cost $30.00
Revenue $100, Desired Margin 40% → Maximum Cost $60.00
Revenue $80, Desired Margin 50% → Maximum Cost $40.00
Revenue $100, Desired Margin 30% → Maximum Cost $70.00
Revenue $160, Desired Margin 50% → Maximum Cost $80.00

Gross Margin vs Net Margin — What's the Difference?

Feature comparison:

Definition: Gross margin — profit after direct costs (COGS). Net margin — profit after ALL expenses.
Includes: Gross margin — only cost of goods sold. Net margin — all expenses (rent, wages, taxes, and more).
Formula: Gross margin — (Revenue − COGS) ÷ Revenue × 100. Net margin — (Revenue − Total Expenses) ÷ Revenue × 100.
What it shows: Gross margin — product-level profitability. Net margin — overall business profitability.
When to use: Gross margin — pricing decisions. Net margin — overall business health.

Example: Revenue $100,000, COGS (direct costs) $40,000, Operating Expenses (rent, wages, and more) $30,000, Total Expenses $70,000.

Gross Margin: ($100,000 − $40,000) ÷ $100,000 = 60%
Net Margin: ($100,000 − $70,000) ÷ $100,000 = 30%

Margin vs Markup — What's the Difference?

This is one of the most common confusions in business pricing. Let's clear it up.

Feature comparison:

Definition: Margin — % of revenue that is profit. Markup — % added to cost.
Formula: Margin — (Revenue − Cost) ÷ Revenue × 100. Markup — (Revenue − Cost) ÷ Cost × 100.
Base: Margin — revenue (selling price). Markup — cost (what you paid).
Value: Margin is always lower than markup. Markup is always higher than margin.
When to use: Margin — profitability analysis. Markup — setting prices.

Example with $30 cost, $50 revenue:

Profit: $50 − $30 = $20
Margin: ($20 ÷ $50) × 100 = 40%
Markup: ($20 ÷ $30) × 100 = 66.7%

Key observation: the same transaction yields a 40% margin and a 66.7% markup. Margin is always lower than markup.

When to use each: pricing products → markup. Analyzing profitability → margin. Financial reporting → margin. Comparing products → both.

Conversion formulas:

Margin = Markup ÷ (1 + Markup)
Markup = Margin ÷ (1 − Margin)

The calculator above shows both figures side by side automatically. For a markup-first view, try the Markup Calculator.

How to Calculate Margin in Excel

You can also calculate margin in Excel.

Method 1 — Basic margin calculation:

Enter Cost in cell A1: 30
Enter Revenue in cell B1: 50
Calculate Profit in C1: =B1-A1 → 20
Calculate Margin in D1: =C1/B1 → 0.4
Format as percentage: right-click → Format Cells → Percentage

Method 2 — Finding revenue from cost and margin:

Enter Cost in cell A1: 30
Enter Desired Margin in cell B1: 40%
Calculate Revenue in C1: =A1/(1-B1) → 50

Method 3 — Finding cost from revenue and margin:

Enter Revenue in cell A1: 50
Enter Desired Margin in cell B1: 40%
Calculate Cost in C1: =A1*(1-B1) → 30

Pro tip: use conditional formatting to highlight products with low margins (for example, red for margins below 20%).

What is a Good Profit Margin?

A "good" profit margin varies by industry. Here are general guidelines:

Below 5%: Poor — risky, little room for error.
5-10%: Average — acceptable for many industries.
10-20%: Good — healthy profitability.
20%+: Excellent — strong profitability.

Industry averages (gross margin):

Retail (Grocery): 20-30%
Retail (Clothing): 40-60%
Restaurants: 60-70%
Software: 80-90%
Manufacturing: 30-50%
Consulting: 50-80%
Construction: 20-40%
Healthcare: 40-60%

Note: these are gross margins. Net margins are typically much lower after all expenses.

Factors affecting margin: industry competition, pricing strategy, cost control, brand positioning, economies of scale.

Common Margin Calculation Mistakes

Confusing margin with markup. Mistake: using the markup formula for margin. Fix: margin = profit/revenue, markup = profit/cost.
Forgetting to convert percentage to decimal. Mistake: using 40 instead of 0.40 in formulas. Fix: always divide the percentage by 100.
Using the wrong base for calculation. Mistake: dividing profit by cost instead of revenue. Fix: margin is always a % of revenue.
Not including all costs. Mistake: only counting direct costs, ignoring overhead. Fix: include all relevant costs.
Confusing gross and net margin. Mistake: using gross margin when net margin is needed. Fix: understand which margin you need.
Rounding too early. Mistake: rounding before the final calculation. Fix: keep precision until the end.
Not checking the answer. Mistake: assuming the calculation is correct. Fix: verify by plugging back into the formula.
Forgetting to update when costs change. Mistake: keeping the same price when costs go up. Fix: review pricing regularly.

What This Calculator Can and Cannot Do

This calculator CAN help with:

Calculating profit margin percentage
Finding revenue from cost and margin
Finding cost from revenue and margin
Calculating profit
Gross margin calculations
Showing the equivalent markup percentage alongside every margin result
Business pricing decisions and profitability analysis

This calculator CANNOT do:

Calculate net margin including operating expenses and taxes — use the Operating Margin & EBIT Calculator
Account for taxes automatically
Replace professional financial advice
Handle multiple products with different margins at once

Final Summary

Remember the key formulas:

Margin %: (Revenue − Cost) ÷ Revenue × 100
Revenue: Cost ÷ (1 − Margin %)
Cost: Revenue × (1 − Margin %)
Profit: Revenue − Cost

Quick reference:

40% margin = $20 profit on $50 revenue
50% margin = $50 profit on $100 revenue
20% margin = $20 profit on $100 revenue

Margin vs Markup: Margin = % of revenue (lower). Markup = % of cost (higher).

Start calculating now! Just enter your values above and get instant results — completely free.

Related concepts

Gross Margin

Profit after direct costs (COGS) only — the most fundamental measure of product-level profitability.

Net Margin

Profit after ALL expenses, including rent, wages, and taxes — the bottom-line measure of overall business health.

COGS

Cost of Goods Sold — all costs to acquire or produce the product, including materials, labor, and shipping.

Frequently Asked Questions

What is a margin calculator?+

A margin calculator helps you calculate profit margin, revenue, or cost. Enter any two values and get the third instantly.

What is the profit margin formula?+

The profit margin formula is: Margin % = (Revenue − Cost) ÷ Revenue × 100.

How do you calculate profit margin?+

To calculate profit margin, subtract cost from revenue to get profit, then divide profit by revenue and multiply by 100.

What is the difference between margin and markup?+

Margin is calculated as a percentage of revenue. Markup is calculated as a percentage of cost. Margin is always lower than markup for the same transaction.

How do I find revenue from cost and margin?+

Use the formula: Revenue = Cost ÷ (1 − Margin % ÷ 100). Example: $30 ÷ (1 − 0.40) = $50.

How do I find cost from revenue and margin?+

Use the formula: Cost = Revenue × (1 − Margin % ÷ 100). Example: $50 × (1 − 0.40) = $30.

What is a good profit margin?+

Generally: below 5% is poor, 5-10% is average, 10-20% is good, 20%+ is excellent. It varies by industry.

What is the difference between gross margin and net margin?+

Gross margin is profit after direct costs (COGS). Net margin is profit after ALL expenses (rent, wages, taxes, and more).

How do I calculate margin in Excel?+

Use the formula: =(Revenue − Cost) / Revenue. Example: =(B1-A1)/B1. Format the result as a percentage.

What is the margin calculation formula?+

The margin calculation formula is: Margin % = (Revenue − Cost) ÷ Revenue × 100.

What is net margin calculation?+

Net margin calculation is: Net Margin % = (Revenue − Total Expenses) ÷ Revenue × 100.

Can margin be over 100%?+

No, margin cannot be over 100% because it's a percentage of revenue. The maximum margin is 100% (if cost is $0).

What if my margin is negative?+

A negative margin means you're losing money on each sale. Your costs exceed your revenue.

Is this margin calculator free?+

Yes — completely free with no registration required.

Margin Calculator — Calculate Profit Margin & Gross Margin Instantly

Inputs

Step-by-Step Calculation

Results

Bookmark this margin calculator

Margin Formula

How the calculation works

Learn more about this calculation

Profit Margin: Formulas, Examples, and Calculator Guide

Discount, Markup, and Margin: A Practical Pricing Guide

Margin Calculator — Calculate Profit Margin & Gross Margin Instantly

Inputs

Step-by-Step Calculation

Results

Bookmark this margin calculator

Key output metrics

Revenue Breakdown

Margin vs Markup

How to understand and use this calculator

Quick Answer

Use the Margin Calculator

What is Profit Margin?

The Profit Margin Formula

How to Calculate Margin — Step by Step

How to Find Revenue from Cost and Margin

How to Find Cost from Revenue and Margin

Gross Margin vs Net Margin — What's the Difference?

Margin vs Markup — What's the Difference?

How to Calculate Margin in Excel

What is a Good Profit Margin?

Common Margin Calculation Mistakes

What This Calculator Can and Cannot Do

Final Summary

Related concepts

Frequently Asked Questions

Margin Formula

How the calculation works

Learn more about this calculation

Profit Margin: Formulas, Examples, and Calculator Guide

Discount, Markup, and Margin: A Practical Pricing Guide

Key output metrics

Revenue Breakdown

Margin vs Markup

How to understand and use this calculator

Quick Answer

Use the Margin Calculator

What is Profit Margin?

The Profit Margin Formula

How to Calculate Margin — Step by Step

How to Find Revenue from Cost and Margin

How to Find Cost from Revenue and Margin

Gross Margin vs Net Margin — What's the Difference?

Margin vs Markup — What's the Difference?

How to Calculate Margin in Excel

What is a Good Profit Margin?

Common Margin Calculation Mistakes

What This Calculator Can and Cannot Do

Final Summary

Related concepts

Frequently Asked Questions