Work out your cholesterol ratios from a lipid panel. This free cholesterol ratio calculator shows your total:HDL ratio, LDL:HDL, triglyceride:HDL and non-HDL – informational only, not a diagnosis.
Reference bands are general guides for adults. Healthy targets are individual – your clinician interprets ratios within your overall risk picture.
How the Cholesterol Ratio Calculator Works
The Cholesterol Ratio Calculator turns the numbers from a standard lipid panel into the ratios doctors sometimes reference alongside individual cholesterol values, using simple division on the figures you enter.
Formula: Total : HDL ratio = Total cholesterol ÷ HDL. LDL : HDL ratio = LDL ÷ HDL. Triglyceride : HDL ratio = Triglycerides ÷ HDL. Non-HDL cholesterol = Total cholesterol − HDL. The Total : HDL ratio is then placed into a general band: under 3.5 = Optimal range, 3.5 up to 5 = Desirable range, 5 and above = Higher-risk range.
- Total cholesterol — your total cholesterol value from a lipid panel
- HDL (“good”) — your HDL cholesterol value, used as the divisor in every ratio
- LDL (optional) — your LDL cholesterol value, used to calculate LDL : HDL
- Triglycerides (optional) — your triglyceride value, used to calculate Triglyceride : HDL
- Units — a display toggle between mg/dL and mmol/L for the values you enter
Example Scenarios
| Total cholesterol | HDL | Total : HDL ratio |
|---|---|---|
| 200 mg/dL | 50 mg/dL | 4.0 — Desirable range |
| 180 mg/dL | 60 mg/dL | 3.0 — Optimal range |
| 240 mg/dL | 40 mg/dL | 6.0 — Higher-risk range |
| 150 mg/dL | 45 mg/dL | 3.3 — Optimal range |
| 220 mg/dL | 55 mg/dL | 4.0 — Desirable range |
| 260 mg/dL | 35 mg/dL | 7.4 — Higher-risk range |
Cholesterol Ratio Calculator FAQ
What is a “good” total cholesterol to HDL ratio?
This tool groups a Total : HDL ratio under 3.5 as an optimal range and under 5 as a desirable range, with 5 or above shown as a higher-risk range. These are general bands, not personal targets — your clinician sets what’s healthy for you.What’s the difference between the Total : HDL ratio and the LDL : HDL ratio?
Total : HDL divides your total cholesterol by HDL, while LDL : HDL divides just your LDL (“bad” cholesterol) by HDL. Both describe the balance between protective and non-protective cholesterol but use different numerators from your lipid panel.What is non-HDL cholesterol and why does it matter?
Non-HDL cholesterol is your total cholesterol minus HDL, so it captures LDL plus other non-protective cholesterol particles in one number. Some clinicians use it alongside LDL as another marker when reviewing a lipid panel.Can I enter my results in mmol/L instead of mg/dL?
Yes, use the units toggle before entering your values. Enter the numbers exactly as they appear on your lab report in whichever unit it uses — the ratios are calculated the same way regardless of unit.Does a high cholesterol ratio mean I have heart disease?
No. A ratio is just one data point among many a clinician weighs, alongside blood pressure, family history, smoking status and other factors. This calculator doesn’t diagnose any condition — discuss your full lipid panel with a healthcare professional.Why are LDL and triglycerides optional inputs?
The core Total : HDL ratio only needs total cholesterol and HDL. LDL and triglycerides are optional because not every lipid panel reports them the same way, but adding them unlocks the extra LDL : HDL and Triglyceride : HDL ratios.Related Calculators
Cholesterol is only one piece of cardiovascular health — the Blood Pressure by Age Calculator and Diabetes Risk Calculator cover two other commonly tracked risk factors, while the Waist to Hip Ratio Calculator adds a body-composition angle to the same overall picture.