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Work out total-to-HDL and LDL-to-HDL ratios plus non-HDL cholesterol, with risk bands.
The cholesterol ratio is your total cholesterol divided by HDL cholesterol. It is a key indicator of cardiovascular risk, with lower ratios indicating better heart health.
| Ratio | Optimal | High |
|---|---|---|
| TC/HDL | < 3.5 | > 5.0 |
| LDL/HDL | < 2.0 | > 3.0 |
| Triglycerides/HDL | < 2.0 | > 4.0 |
| Non-HDL Cholesterol | < 130 mg/dL | > 160 mg/dL |
Formula
TC/HDL Ratio = Total Cholesterol ÷ HDL | Non-HDL = Total Cholesterol − HDLTotal Cholesterol = Sum of all cholesterol types in mg/dL
HDL = High-density lipoprotein (good) cholesterol in mg/dL
LDL = Low-density lipoprotein (bad) cholesterol in mg/dL
Worked Example
TC 200, HDL 55, LDL 120, TG 150
Did you know? The TC/HDL ratio is a stronger predictor of coronary heart disease than total cholesterol or LDL alone, according to the Framingham Heart Study spanning over 50 years of research (source: American Heart Association).
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