# Cholesterol Ratio Calculator Calculate your total cholesterol to HDL ratio and Non-HDL cholesterol, with risk bands consistent with AHA and NCEP ATP III guidance. --- - **Canonical URL:** https://dothecalculation.com/calculators/cholesterol-ratio-calculator - **Category:** Health and fitness - **Publisher:** Do The Calculation (https://dothecalculation.com) - **Cost:** Free, no account or sign-up required - **Privacy:** Runs entirely in the browser; inputs are never sent to a server - **Methodology:** https://dothecalculation.com/methodology --- ## Calculate your total cholesterol to HDL ratio Enter your total cholesterol and HDL from a recent lipid panel to see your TC/HDL ratio, Non-HDL cholesterol, and where each falls on standard risk bands. - TC/HDL ratio with AHA-aligned risk bands - Non-HDL cholesterol, the newer primary treatment target - Explicitly a screening ratio, not a diagnosis ## What the ratio adds beyond a single cholesterol number Total Cholesterol to HDL ratio (TC/HDL) is calculated by dividing total cholesterol by HDL ('good') cholesterol, using two numbers from the same lipid panel. A single total cholesterol number in isolation doesn't distinguish someone with high HDL (generally protective) from someone with the same total driven by high LDL ('bad' cholesterol) — the ratio captures some of that balance in one number. Consistent with guidance referenced by the American Heart Association and the earlier NCEP ATP III framework, commonly used bands are: below 3.5 considered low risk, 3.5 to 5.0 considered moderate/average risk, and above 5.0 considered higher risk. ## Non-HDL cholesterol: what current guidance actually emphasizes more Beyond the classic ratio, current ACC/AHA cholesterol guidance identifies Non-HDL cholesterol (Total Cholesterol minus HDL) as a primary treatment target, because it captures all the 'bad' cholesterol-carrying particles (LDL plus other atherogenic particles like VLDL) in one number and has been shown to predict cardiovascular events better than LDL alone. This calculator shows Non-HDL alongside the traditional ratio specifically because many older cholesterol-ratio tools only show the ratio and miss this more current emphasis. ## Why this is a screening ratio, not a diagnosis A cholesterol ratio can flag a pattern worth discussing, but it does not diagnose heart disease and shouldn't be read as a standalone verdict on cardiovascular risk. Clinicians interpret lipid numbers together with LDL, triglycerides, blood pressure, age, diabetes status, smoking history, and family history — a full risk assessment tool like the [Cardiac Risk (Framingham) Calculator](/calculators/cardiac-risk-framingham-calculator) incorporates several of those factors together, which a ratio alone cannot. A full lipid panel read by a clinician, not a ratio calculator, is what actually determines whether treatment is warranted. ## Worked example: a ratio in the low-risk band Total cholesterol 180 mg/dL, HDL 60 mg/dL: TC/HDL = 180 ÷ 60 = 3.0 — under the 3.5 threshold, in the commonly cited lower-risk band. Non-HDL cholesterol here is 180 − 60 = 120 mg/dL. ## Worked example: a ratio in the higher-risk band Total cholesterol 240 mg/dL, HDL 40 mg/dL: TC/HDL = 240 ÷ 40 = 6.0 — above the 5.0 threshold, in the commonly cited higher-risk band, driven here by both an elevated total cholesterol and a low HDL. Non-HDL cholesterol here is 240 − 40 = 200 mg/dL, itself an elevated Non-HDL reading worth discussing with a clinician alongside the ratio. ## Frequently asked questions ### What is the cholesterol ratio formula? TC/HDL Ratio = Total Cholesterol ÷ HDL Cholesterol, using two values from the same lipid panel, in the same units (the ratio itself is unitless as long as both are measured consistently). ### What is a good cholesterol ratio? Guidance consistent with the American Heart Association and the NCEP ATP III framework commonly cites under 3.5 as low risk, 3.5-5.0 as moderate risk, and above 5.0 as higher risk — though a clinician interprets this alongside your full lipid panel, not in isolation. ### What is Non-HDL cholesterol and why does it matter? Non-HDL cholesterol is Total Cholesterol minus HDL, capturing all atherogenic ('bad') cholesterol-carrying particles including LDL and VLDL in one number. Current ACC/AHA guidance identifies it as a primary treatment target because it predicts cardiovascular events better than LDL alone. ### Is a low cholesterol ratio always healthy? A low ratio is a favorable signal, but it doesn't rule out other risk factors like high triglycerides, high blood pressure, or family history — a ratio is one piece of a larger risk picture, not a complete assessment on its own. ### Does this calculator diagnose heart disease risk? No. It calculates a screening ratio from numbers you provide. Diagnosis and risk assessment require a clinician reviewing your full lipid panel alongside your broader health history. ### What's the difference between TC/HDL ratio and LDL/HDL ratio? TC/HDL uses total cholesterol (which includes LDL, HDL, and a portion of triglycerides); LDL/HDL isolates just the 'bad' and 'good' cholesterol components directly. Both are used in different clinical contexts, and neither replaces a full panel review. ### How often should I check my cholesterol ratio? Follow your doctor's recommended lipid panel schedule, generally every 4-6 years for average-risk adults or more frequently if you have risk factors or are on treatment — this calculator is for reviewing a result you already have, not for determining testing frequency. ## Related concepts - **TC/HDL ratio** — Total cholesterol divided by HDL cholesterol, a screening ratio for cardiovascular risk referenced in AHA and NCEP ATP III guidance. - **Non-HDL cholesterol** — Total cholesterol minus HDL, capturing all atherogenic cholesterol particles; identified by current ACC/AHA guidance as a primary treatment target. - **HDL and LDL cholesterol** — HDL ('good') cholesterol helps clear cholesterol from the bloodstream; LDL ('bad') cholesterol contributes to arterial plaque buildup. ## Related guides - [How to Use Do The Calculation Calculators: A Practical Step-by-Step Guide](https://dothecalculation.com/blog/site-guides/how-to-use-calculators) — Learn the fastest reliable workflow for using Do The Calculation calculators, reading results, checking formulas, and using save, print, share, and export actions correctly. - [Understanding Calculator Formulas: How DTC Turns Inputs into Results](https://dothecalculation.com/blog/site-guides/understanding-calculator-formulas) — Understand how Do The Calculation formulas are presented, what the explanation blocks mean, and how to verify calculator logic before using a result in a real decision. ## Related calculators - [Waist-to-Height Ratio Calculator](https://dothecalculation.com/calculators/waist-to-height-ratio-calculator) — Calculate your waist-to-height ratio and see where it falls against the 0.5 screening threshold and standard risk bands. - [Bench Press Standards Calculator](https://dothecalculation.com/calculators/bench-press-standards-calculator) — See which strength tier your bench press falls into, from Beginner to Elite, using bodyweight-ratio benchmarks. - [Framingham Cardiac Risk Calculator](https://dothecalculation.com/calculators/cardiac-risk-framingham-calculator) — Estimate your 10-year risk of cardiovascular disease using the trusted Framingham risk score algorithm and health factors. - [Meal Glycemic Load Calculator](https://dothecalculation.com/calculators/glycemic-load-meal-calculator) — Calculate the total glycemic load of your daily meals and see an impact classification for better blood sugar management. - [Pregnancy Weight Gain Calculator](https://dothecalculation.com/calculators/pregnancy-weight-gain-calculator) — See your recommended total and weekly pregnancy weight-gain range by pre-pregnancy BMI category, using IOM guidelines. - [Squat & Deadlift Standards Calculator](https://dothecalculation.com/calculators/squat-deadlift-standards-calculator) — See which strength tier your squat or deadlift falls into, from Beginner to Elite, using bodyweight-ratio benchmarks. --- _This calculator provides a screening ratio consistent with guidance referenced by the American Heart Association and the NCEP ATP III framework. It is not a diagnosis. A full lipid panel interpreted by a clinician, alongside your broader risk factors, is what determines actual cardiovascular risk and any need for treatment._ --- _Source: [Do The Calculation](https://dothecalculation.com/calculators/cholesterol-ratio-calculator). Quote freely with attribution and a link to this page._