Fitness & Health

Cholesterol Ratio Calculator (Total/HDL and More)

Work out your total-to-HDL cholesterol ratio plus LDL/HDL, triglyceride/HDL, and non-HDL cholesterol. It estimates LDL with the Friedewald formula when you leave LDL blank.

How to use
  1. Enter total cholesterol, HDL, and triglycerides.
  2. Add LDL if you have it, or leave it blank to estimate.
  3. Switch between mg/dL and mmol/L.
HDL
Total / HDL ratio
4.00

Optimal cardiovascular ratios

LDL / HDL
2.80
Trig / HDL
2.40
Non-HDL
150 mg/dL
LDL (Friedewald)
126 mg/dL
Estimates for general wellness, not medical advice. Check with a doctor or dietitian before acting on health figures.
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Reference ranges

Total/HDL ratioCategory
Under 3.5Optimal
3.5 to 5Average
Above 5Higher risk

Common questions

Is the cholesterol ratio better than total cholesterol?

Many clinicians find the total-to-HDL ratio a more useful risk signal than total cholesterol alone, because it accounts for protective HDL.

What is the Friedewald formula?

It estimates LDL from total cholesterol, HDL, and triglycerides. It is less reliable when triglycerides are very high.

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