Cholesterol Ratio Calculator
Compute TC/HDL, LDL/HDL, non‑HDL and estimated LDL using the Friedewald formula (if triglycerides are available).
How to Use Cholesterol Ratio Calculator
- Enter your Total Cholesterol and HDL. These are the minimum required values from a standard lipid panel. Type them in mg/dL.
- Optionally, add Triglycerides and LDL. If you have your TG value and it's below 400 mg/dL, the tool can estimate LDL using the Friedewald formula. You can also enter a directly measured LDL.
- Click Calculate. The tool instantly computes TC/HDL ratio, LDL/HDL ratio, and non‑HDL cholesterol.
- Check the risk bands. Each ratio is labelled as Ideal, Average or High Risk based on established cutoffs, giving you a quick interpretation of your lipid profile.
Benefits of Cholesterol Ratio Calculator
- Computes three key lipid ratios in one click, offering more insight than looking at individual numbers in isolation.
- Includes Friedewald LDL estimation, so you can still get a full picture even if your lab report only gives TC, HDL and TG.
- Clearly labels each result with a risk category, making the numbers meaningful for people without a medical background.
- No data uploaded — your lipid panel stays on your device, completely private.
Frequently Asked Questions
What is a good total cholesterol to HDL ratio?
A ratio below 3.5 is considered ideal. Between 3.5 and 5.0 is average, and above 5.0 indicates higher cardiovascular risk. The lower the ratio, the better.
Why is the Friedewald LDL estimate used?
Because many standard lipid panels do not measure LDL directly. The Friedewald formula (LDL = TC − HDL − TG/5) provides a reliable estimate when triglycerides are below 400 mg/dL. Above that, it becomes less accurate.
What is non‑HDL cholesterol and why does it matter?
Non‑HDL is total cholesterol minus HDL. It includes all the "bad" cholesterol particles. A level below 130 mg/dL is generally considered ideal and is a strong predictor of cardiovascular risk.
Is Cholesterol Ratio Calculator free and private?
Yes — it is 100% free, needs no sign‑up, and everything runs in your browser; your data never leaves your device.
Disclaimer: This tool is for educational purposes only and is not medical advice. Always consult a qualified doctor for health decisions.