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Free cholesterol ratio calculator for your lipid panel: compute total cholesterol to HDL (TC/HDL), optional LDL to HDL, and non-HDL cholesterol in mg/dL. Switch between mg/dL and mmol/L to match your lab report. Interpretations are educational summaries—not personal medical advice.
Last updated: April 20, 2026
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TC / HDL
4
Desirable
Non-HDL (mg/dL)
150
TC − HDL, shown in mg/dL for reference
TC/HDL interpretation
Ratios in this range are generally considered favorable. Your clinician may still set targets based on your overall risk, age, and conditions such as diabetes or prior cardiovascular disease.
LDL / HDL
2.4
Near optimal
Ratios between 2 and 3 are common; your clinician may interpret this in context of your other numbers and risk factors.
This tool is for education only. Lipid targets depend on age, sex, blood pressure, diabetes, smoking, family history, and prior cardiovascular disease. Do not start, stop, or change medications based on a website calculator.
A widely quoted summary measure from standard lipid panels. Lower values are generally more favorable in population data when other risk factors are similar.
Compares LDL cholesterol to HDL. Many educational resources discuss LDL/HDL alongside absolute LDL and non-HDL goals.
Non-HDL captures VLDL and LDL-related atherogenic cholesterol. Guidelines often reference non-HDL targets, especially when triglycerides are high.
Total cholesterol 200 mg/dL, HDL 50 mg/dL → TC/HDL = 4.0, non-HDL ≈ 150 mg/dL.
Enter values exactly as they appear on your lab report and choose the matching unit system. Ratios are computed in consistent units: for mmol/L entries, values are converted to mg/dL using conventional cholesterol conversion so that division matches what many US references describe.
TC/HDL = Total cholesterol ÷ HDLLDL/HDL = LDL ÷ HDL (optional)Non-HDL (mg/dL) = Total (mg/dL) − HDL (mg/dL)Category labels in the tool are simplified educational bands. Your clinician may use different thresholds or formal risk models (for example, pooled cohort equations or country-specific guidelines).
Lipid management emphasizes LDL cholesterol, non-HDL cholesterol or ApoB, triglycerides, and overall atherosclerotic cardiovascular risk—not ratios alone. HDL raising beyond lifestyle has not consistently improved outcomes in drug trials, so focus on whole-picture prevention with your care team.
Explore more waist-to-height ratio and GMI to A1C tools for related cardiometabolic context.
Get a Custom Calculator for Your PlatformThis pattern shows a high TC/HDL with substantial non-HDL. Only a licensed clinician can integrate blood pressure, diabetes status, smoking, family history, and prior disease to choose lifestyle steps, medications, and follow-up intervals.
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