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Coffee-to-Water Brew Ratio Calculator

Calculate the exact coffee-to-water ratio for pour-over, French press, drip, or cold brew, with gram and tablespoon results.

A coffee brew ratio is coffee weight to water weight, written 1:X. Coffee (g) = Water (g) ÷ Ratio. At a common 1:16 pour-over ratio, 500 ml (500 g) of water needs 500 ÷ 16 = 31.3 grams of coffee, about 5.9 tablespoons.

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

Saved Runs

Inputs

Brew method

Water unit

Water amountml

Ratio (1 : X)

Typically 1:15 to 1:17. Lower numbers (e.g. 1:12) make a stronger brew; higher numbers (e.g. 1:18) make a lighter one.

Results

Ground coffee needed

31.3 g

In tablespoons (approx.)5.9 tbsp

Water needed500 ml (16.9 fl oz)

Ratio1 : 16

Bookmark this coffee ratio calculator

Different pots, different mugs, different moods — re-run this any time your brew volume changes rather than eyeballing the scoop.

Formula

Coffee brew ratio formula

Coffee (g) = Water (g) ÷ Ratio. Water in grams is the same number as water in milliliters, since water has a density of 1 g/ml.

A 1:16 ratio means 1 gram of coffee for every 16 grams (or milliliters) of water. Tablespoon conversion assumes roughly 5.3 grams of ground coffee per level tablespoon — grind size and bean density shift this slightly.

Step by step

How the calculation works

1Choose a brew method to load a typical starting ratio, or set your own.
2Enter how much water your brew will use (your kettle, carafe, or mug capacity).
3Read the exact grams of coffee needed, plus the tablespoon equivalent for when you don't have a scale.
4Adjust the ratio directly for a stronger or weaker cup than the method default.

Example

Worked example — 500 ml pour-over at a 1:16 ratio

Coffee = 500 ÷ 16 = 31.3 g, which is about 5.9 level tablespoons of ground coffee. That same 500 ml is 16.9 fl oz of water.

Related guides

Learn more about this calculation

Guide

Coffee Brew Ratio: The Science Behind Every Cup

Why brew ratio — not grind size or water temperature — is the single biggest lever for coffee taste, with SCA-standard ratios verified for every brewing method.

Site Guide

How to Use Do The Calculation Calculators: A Practical Step-by-Step Guide

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Coffee-to-Water Brew Ratio Calculator

Calculate the exact coffee-to-water ratio for pour-over, French press, drip, or cold brew, with gram and tablespoon results.

How to understand and use this calculator

Quick Answer — How Much Coffee Per Cup of Water?

The core formula: Coffee (g) = Water (g) ÷ Ratio. Water in grams is the same number as water in milliliters, because water has a density of almost exactly 1 gram per milliliter.

A ratio written as 1:16 means 1 part coffee to 16 parts water by weight — for every 16 grams of water, use 1 gram of ground coffee.

Quick reference:

240 ml (about 1 cup), 1:15 pour-over → 16.0 g coffee = 3.0 tbsp
500 ml pour-over, 1:16 → 31.3 g coffee = 5.9 tbsp
700 ml French press, 1:13 → 53.8 g coffee = 10.2 tbsp
1,000 ml drip, 1:17 → 58.8 g coffee = 11.1 tbsp
1,000 ml cold brew concentrate, 1:6 → 166.7 g coffee = 31.4 tbsp

Worked example: 500 ml of water at a 1:16 pour-over ratio needs 500 ÷ 16 = 31.3 grams of coffee, which is roughly 5.9 level tablespoons if you're measuring by scoop instead of scale.

How to Use This Calculator

Choose your brew method — pour-over, French press, drip, or cold brew concentrate — to load that method's typical starting ratio.

Enter the water amount you're brewing, in milliliters or fluid ounces.

The ratio field updates automatically with the method, but you can override it directly for a stronger or weaker cup.

Example input: Method = French press • Water = 700 ml • Ratio = 1:13 (the French press default).

Output: Coffee needed = 700 ÷ 13 = 53.8 g, about 10.2 tablespoons, using 23.7 fl oz of water.

If you're scaling a whole recipe rather than a single brew ratio — say, doubling a French press batch for guests — the recipe scaler calculator handles proportional scaling for any ingredient list.

The Formula This Calculator Uses

Nothing here is hidden — the whole calculation is two steps.

Step 1 — Normalize water to grams. If you entered fluid ounces, convert: Water (ml) = Ounces × 29.5735. Because water's density is 1 g/ml, the gram figure and the milliliter figure are numerically identical.

Step 2 — Divide by the ratio. Coffee (g) = Water (g) ÷ Ratio, where Ratio is the 'X' in a 1:X ratio.

Tablespoon conversion: Tablespoons ≈ Coffee (g) ÷ 5.3. This assumes a medium grind and a fairly standard bean density — coarser grinds (French press) pack slightly less densely per tablespoon, and very fine grinds (espresso) pack more, so a scale is meaningfully more accurate than a scoop whenever precision matters.

Why weight, not volume, for the coffee side: a tablespoon of coffee beans varies in weight by roast, bean size and grind coarseness by as much as 15-20%, while a gram is a gram regardless of any of that. Coffee professionals brew by weight for exactly this reason; this calculator defaults to weight and offers the tablespoon figure only as a fallback.

Step-by-Step Worked Derivation

Take the 500 ml pour-over example at a 1:16 ratio and do it by hand.

Step 1. Water is already in milliliters: 500 ml, which equals 500 g of water.

Step 2. Divide by the ratio: 500 ÷ 16 = 31.25 g, which the calculator rounds to 31.3 g.

Step 3 — Tablespoons. 31.3 ÷ 5.3 = 5.9 tablespoons.

Step 4 — Fluid ounces, for reference. 500 ÷ 29.5735 = 16.9 fl oz of water.

Answer: 31.3 grams of coffee (about 5.9 level tablespoons) for 500 ml (16.9 fl oz) of water at a 1:16 ratio.

Why Ratio Varies by Brew Method

Different brewing methods extract coffee at different rates and speeds, which is why the same ratio doesn't taste the same across methods, and why each method has its own conventional range.

Pour-over (typically 1:15 to 1:17) uses a relatively short, controlled contact time with fresh, near-boiling water pouring continuously through the grounds, which extracts efficiently — a lighter ratio (more water per gram of coffee) still produces good extraction.

French press (typically 1:12 to 1:15) steeps grounds in full immersion for several minutes with a coarser grind, which extracts more slowly per unit of contact, so a stronger ratio (less water per gram) balances the slower extraction rate.

Drip machines (typically 1:16 to 1:18) vary by machine, but generally use a lighter ratio than French press because the water passes through relatively quickly and often at a slightly lower temperature than a manual pour-over.

Cold brew concentrate (typically 1:4 to 1:8) is deliberately much stronger because cold water extracts far less efficiently than hot water even over many hours of steeping — the concentrate is meant to be diluted roughly 1:1 with water or milk before drinking, not served at full strength.

None of these ranges are hard rules — they're starting points. Personal taste, specific bean roast level, and grind size all shift where in (or outside) the typical range you'll actually prefer to land.

Realistic Scenarios

Scenario 1 — A single morning cup. 240 ml pour-over at 1:15: 16.0 g coffee, about 3.0 tablespoons.

Scenario 2 — A full pour-over carafe. 500 ml at 1:16: 31.3 g coffee, about 5.9 tablespoons, 16.9 fl oz of water.

Scenario 3 — French press for two. 700 ml at 1:13 (French press default, stronger than pour-over): 53.8 g coffee, about 10.2 tablespoons.

Scenario 4 — A full drip pot. 1,000 ml at 1:17: 58.8 g coffee, about 11.1 tablespoons, 33.8 fl oz of water.

Scenario 5 — Cold brew concentrate batch. 1,000 ml water at 1:6: 166.7 g coffee — nearly three times the pour-over amount for the same water volume, because cold brew concentrate is designed to be diluted before drinking.

Common Coffee Ratio Mistakes

Measuring coffee by volume instead of weight. A tablespoon of finely ground coffee weighs meaningfully more than a tablespoon of coarsely ground coffee from the same beans, so a scoop-based recipe drifts as your grind setting changes.
Using one ratio for every brew method. A French press ratio applied to a pour-over (or vice versa) will taste noticeably off, because each method's contact time and extraction efficiency assumes its own typical range.
Confusing cold brew concentrate strength with drinking strength. A 1:6 cold brew concentrate is meant to be cut roughly 1:1 with water or milk — drinking it undiluted delivers roughly double the intended caffeine and strength per serving.
Ignoring that 'stronger' and 'more bitter' aren't the same thing. A too-strong ratio concentrates flavor; a too-long or too-hot brew over-extracts bitterness. Ratio and brew time/temperature are separate variables that both affect the final cup.
Not accounting for grind coarseness when eyeballing tablespoons. If precision matters — dialing in a specific taste, or brewing consistently across days — a kitchen scale removes this variable entirely.

What This Calculator Can and Cannot Do

It can:

Convert any water amount into the exact grams of coffee needed at a given ratio
Provide typical starting ratios for pour-over, French press, drip and cold brew concentrate
Convert grams into an approximate tablespoon measurement
Show how coffee needs scale across a range of common ratios for comparison

It cannot:

Account for grind size, roast level, water temperature, or brew time, all of which affect taste independently of the ratio
Guarantee a specific taste outcome — ratio is one variable among several that determine extraction and flavor
Replace a kitchen scale for genuinely precise brewing; the tablespoon conversion is an approximation

The honest summary: this calculator gets the math exactly right for whatever ratio you choose. Finding your preferred ratio within (or outside) the typical range for your method is a matter of taste, best refined through a few cups of trial and adjustment.

Final Summary

The formula worth remembering: Coffee (g) = Water (g or ml) ÷ Ratio.

Typical starting ratios: pour-over 1:15–1:17, French press 1:12–1:15, drip 1:16–1:18, cold brew concentrate 1:4–1:8 (diluted before drinking).

The one thing to actually do: weigh your coffee and water instead of scooping, at least once, to see how much a 'tablespoon' actually varies with your grind — then decide whether the tablespoon shortcut is precise enough for your taste.

Related tools worth a look: the recipe scaler calculator for scaling any recipe by multiplier or serving size, and the homebrew ABV & priming sugar calculator for another precision kitchen-ratio tool. For the SCA extraction science and TDS standards behind these ratios, see our coffee brew ratio guide.

Related concepts

Brew ratio

The proportion of coffee to water by weight, written 1:X. Different brewing methods use different typical ranges because they extract coffee at different rates and speeds.

Extraction

The process of dissolving flavor compounds out of ground coffee into water. Under-extraction tastes sour or weak; over-extraction tastes bitter or harsh, independent of the ratio used.

Cold brew concentrate vs. ready-to-drink

Cold brew is typically made at a strong 1:4 to 1:8 ratio as a concentrate, then diluted roughly 1:1 before drinking — distinct from ready-to-drink cold brew, which is already at drinking strength.

Frequently Asked Questions

How much coffee per cup of water?+

At a common 1:16 pour-over ratio, a 240 ml (8 oz) cup needs about 15 grams of coffee, or roughly 2.8 tablespoons. The exact amount depends on your chosen ratio — stronger ratios like 1:13 use more coffee per cup, lighter ratios like 1:17 use less.

What is a coffee brew ratio?+

A brew ratio expresses the proportion of coffee to water by weight, written as 1:X. A 1:16 ratio means 1 gram of coffee for every 16 grams (or milliliters) of water. Lower numbers make a stronger brew; higher numbers make a lighter one.

What ratio should I use for pour-over coffee?+

Typically 1:15 to 1:17. A 1:15 ratio produces a stronger, more full-bodied cup; 1:17 produces a lighter, more tea-like cup. Most specialty coffee guidance centers around 1:16 as a balanced starting point.

What ratio should I use for French press?+

Typically 1:12 to 1:15, stronger than pour-over. French press uses full immersion with a coarser grind, which extracts more slowly, so a higher coffee-to-water ratio balances that slower extraction.

How strong should cold brew concentrate be?+

Typically 1:4 to 1:8, much stronger than hot-brewed coffee, because cold water extracts far less efficiently even over many hours of steeping. The concentrate is meant to be diluted roughly 1:1 with water or milk before drinking, not served at full strength.

How many tablespoons of coffee is 30 grams?+

About 5.7 level tablespoons, using the common approximation of roughly 5.3 grams of ground coffee per tablespoon. This varies with grind size and bean density, so a kitchen scale gives a more consistent result than scooping.

Does a stronger coffee ratio mean more caffeine?+

Generally yes, more grounds per serving means more caffeine extracted into the cup, but caffeine content also depends on bean type (robusta has roughly twice the caffeine of arabica), roast level, and brew time — ratio is one factor among several.

Is this coffee ratio calculator free?+

Yes — completely free, no registration, and no data leaves your browser. Every figure recalculates instantly as you change the water amount, ratio, or brew method.

Coffee brew ratio formula

Coffee (g) = Water (g) ÷ Ratio. Water in grams is the same number as water in milliliters, since water has a density of 1 g/ml.

How the calculation works

1Choose a brew method to load a typical starting ratio, or set your own.

2Enter how much water your brew will use (your kettle, carafe, or mug capacity).

3Read the exact grams of coffee needed, plus the tablespoon equivalent for when you don't have a scale.

4Adjust the ratio directly for a stronger or weaker cup than the method default.

How to understand and use this calculator

Quick Answer — How Much Coffee Per Cup of Water?

The core formula: Coffee (g) = Water (g) ÷ Ratio. Water in grams is the same number as water in milliliters, because water has a density of almost exactly 1 gram per milliliter.

A ratio written as 1:16 means 1 part coffee to 16 parts water by weight — for every 16 grams of water, use 1 gram of ground coffee.

Quick reference:

240 ml (about 1 cup), 1:15 pour-over → 16.0 g coffee = 3.0 tbsp
500 ml pour-over, 1:16 → 31.3 g coffee = 5.9 tbsp
700 ml French press, 1:13 → 53.8 g coffee = 10.2 tbsp
1,000 ml drip, 1:17 → 58.8 g coffee = 11.1 tbsp
1,000 ml cold brew concentrate, 1:6 → 166.7 g coffee = 31.4 tbsp

Worked example: 500 ml of water at a 1:16 pour-over ratio needs 500 ÷ 16 = 31.3 grams of coffee, which is roughly 5.9 level tablespoons if you're measuring by scoop instead of scale.

How to Use This Calculator

Choose your brew method — pour-over, French press, drip, or cold brew concentrate — to load that method's typical starting ratio.

Enter the water amount you're brewing, in milliliters or fluid ounces.

The ratio field updates automatically with the method, but you can override it directly for a stronger or weaker cup.

Example input: Method = French press • Water = 700 ml • Ratio = 1:13 (the French press default).

Output: Coffee needed = 700 ÷ 13 = 53.8 g, about 10.2 tablespoons, using 23.7 fl oz of water.

The Formula This Calculator Uses

Nothing here is hidden — the whole calculation is two steps.

Step 2 — Divide by the ratio. Coffee (g) = Water (g) ÷ Ratio, where Ratio is the 'X' in a 1:X ratio.

Step-by-Step Worked Derivation

Take the 500 ml pour-over example at a 1:16 ratio and do it by hand.

Step 1. Water is already in milliliters: 500 ml, which equals 500 g of water.

Step 2. Divide by the ratio: 500 ÷ 16 = 31.25 g, which the calculator rounds to 31.3 g.

Step 3 — Tablespoons. 31.3 ÷ 5.3 = 5.9 tablespoons.

Step 4 — Fluid ounces, for reference. 500 ÷ 29.5735 = 16.9 fl oz of water.

Answer: 31.3 grams of coffee (about 5.9 level tablespoons) for 500 ml (16.9 fl oz) of water at a 1:16 ratio.

Why Ratio Varies by Brew Method

Different brewing methods extract coffee at different rates and speeds, which is why the same ratio doesn't taste the same across methods, and why each method has its own conventional range.

Realistic Scenarios

Scenario 1 — A single morning cup. 240 ml pour-over at 1:15: 16.0 g coffee, about 3.0 tablespoons.

Scenario 2 — A full pour-over carafe. 500 ml at 1:16: 31.3 g coffee, about 5.9 tablespoons, 16.9 fl oz of water.

Scenario 3 — French press for two. 700 ml at 1:13 (French press default, stronger than pour-over): 53.8 g coffee, about 10.2 tablespoons.

Scenario 4 — A full drip pot. 1,000 ml at 1:17: 58.8 g coffee, about 11.1 tablespoons, 33.8 fl oz of water.

Common Coffee Ratio Mistakes

Measuring coffee by volume instead of weight. A tablespoon of finely ground coffee weighs meaningfully more than a tablespoon of coarsely ground coffee from the same beans, so a scoop-based recipe drifts as your grind setting changes.
Using one ratio for every brew method. A French press ratio applied to a pour-over (or vice versa) will taste noticeably off, because each method's contact time and extraction efficiency assumes its own typical range.
Confusing cold brew concentrate strength with drinking strength. A 1:6 cold brew concentrate is meant to be cut roughly 1:1 with water or milk — drinking it undiluted delivers roughly double the intended caffeine and strength per serving.
Ignoring that 'stronger' and 'more bitter' aren't the same thing. A too-strong ratio concentrates flavor; a too-long or too-hot brew over-extracts bitterness. Ratio and brew time/temperature are separate variables that both affect the final cup.
Not accounting for grind coarseness when eyeballing tablespoons. If precision matters — dialing in a specific taste, or brewing consistently across days — a kitchen scale removes this variable entirely.

What This Calculator Can and Cannot Do

It can:

Convert any water amount into the exact grams of coffee needed at a given ratio
Provide typical starting ratios for pour-over, French press, drip and cold brew concentrate
Convert grams into an approximate tablespoon measurement
Show how coffee needs scale across a range of common ratios for comparison

It cannot:

Account for grind size, roast level, water temperature, or brew time, all of which affect taste independently of the ratio
Guarantee a specific taste outcome — ratio is one variable among several that determine extraction and flavor
Replace a kitchen scale for genuinely precise brewing; the tablespoon conversion is an approximation

Final Summary

The formula worth remembering: Coffee (g) = Water (g or ml) ÷ Ratio.

Typical starting ratios: pour-over 1:15–1:17, French press 1:12–1:15, drip 1:16–1:18, cold brew concentrate 1:4–1:8 (diluted before drinking).

Related concepts

Brew ratio

The proportion of coffee to water by weight, written 1:X. Different brewing methods use different typical ranges because they extract coffee at different rates and speeds.

Extraction

The process of dissolving flavor compounds out of ground coffee into water. Under-extraction tastes sour or weak; over-extraction tastes bitter or harsh, independent of the ratio used.

Cold brew concentrate vs. ready-to-drink

Cold brew is typically made at a strong 1:4 to 1:8 ratio as a concentrate, then diluted roughly 1:1 before drinking — distinct from ready-to-drink cold brew, which is already at drinking strength.

Frequently Asked Questions

How much coffee per cup of water?+

What is a coffee brew ratio?+

What ratio should I use for pour-over coffee?+

What ratio should I use for French press?+

Typically 1:12 to 1:15, stronger than pour-over. French press uses full immersion with a coarser grind, which extracts more slowly, so a higher coffee-to-water ratio balances that slower extraction.

How strong should cold brew concentrate be?+

How many tablespoons of coffee is 30 grams?+

Does a stronger coffee ratio mean more caffeine?+

Is this coffee ratio calculator free?+

Yes — completely free, no registration, and no data leaves your browser. Every figure recalculates instantly as you change the water amount, ratio, or brew method.

Coffee-to-Water Brew Ratio Calculator

Inputs

Results

Bookmark this coffee ratio calculator

Coffee brew ratio formula

How the calculation works

Worked example — 500 ml pour-over at a 1:16 ratio

Learn more about this calculation

Coffee Brew Ratio: The Science Behind Every Cup

How to Use Do The Calculation Calculators: A Practical Step-by-Step Guide

Recipe Scale & Multiplier Calculator

Homebrew ABV & Priming Sugar Calculator

Coffee-to-Water Brew Ratio Calculator

Inputs

Results

Bookmark this coffee ratio calculator

Key output metrics

Coffee vs. water by weight

Coffee needed across common ratios

How to understand and use this calculator

Quick Answer — How Much Coffee Per Cup of Water?

How to Use This Calculator

The Formula This Calculator Uses

Step-by-Step Worked Derivation

Why Ratio Varies by Brew Method

Realistic Scenarios

Common Coffee Ratio Mistakes

What This Calculator Can and Cannot Do

Final Summary

Related concepts

Frequently Asked Questions

Coffee brew ratio formula

How the calculation works

Worked example — 500 ml pour-over at a 1:16 ratio

Learn more about this calculation

Coffee Brew Ratio: The Science Behind Every Cup

How to Use Do The Calculation Calculators: A Practical Step-by-Step Guide

Recipe Scale & Multiplier Calculator

Homebrew ABV & Priming Sugar Calculator

Key output metrics

Coffee vs. water by weight

Coffee needed across common ratios

How to understand and use this calculator

Quick Answer — How Much Coffee Per Cup of Water?

How to Use This Calculator

The Formula This Calculator Uses

Step-by-Step Worked Derivation

Why Ratio Varies by Brew Method

Realistic Scenarios

Common Coffee Ratio Mistakes

What This Calculator Can and Cannot Do

Final Summary

Related concepts

Frequently Asked Questions