Health July 13, 2026 · 8 Min Read

Cholesterol Calculator – Guide & Formulas

Calculate your non-HDL cholesterol, LDL/HDL ratio, and overall cardiovascular risk metrics using standard lipid panel readings.

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Put these formulas into practice with our instant, step-by-step Cholesterol Calculator.

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The Cholesterol Calculator helps you interpret the results of a standard fasting lipid blood panel. It calculates secondary cardiovascular risk markers, such as non-HDL cholesterol and the critical LDL/HDL ratio, which provide deeper insights into cardiovascular health than raw total cholesterol scores alone.

Key Takeaway

Use the free Cholesterol Calculator to calculate your non-hdl cholesterol, ldl/hdl ratio, and overall cardiovascular risk metrics using standard lipid panel readings. Get instant results with step-by-step explanations.

How to Use the Cholesterol Calculator

  1. Enter your Total Cholesterol, HDL (good) cholesterol, and Triglycerides.
  2. Input your calculated or directly measured LDL (bad) cholesterol.
  3. Review your computed Non-HDL cholesterol and Cholesterol Ratios.
  4. Check the risk classification cards to understand where your numbers sit relative to standard medical guidelines.

The Formula

Non-HDL Cholesterol = Total Cholesterol - HDL Cholesterol. LDL/HDL Ratio = LDL / HDL.

Variable Definitions

  • Total Cholesterol: The total amount of cholesterol in your blood
  • HDL: High-Density Lipoprotein, often called "good" cholesterol
  • LDL: Low-Density Lipoprotein, often called "bad" cholesterol

Evaluating a Lipid Panel

A patient has a total cholesterol of 220 mg/dL, HDL of 50 mg/dL, and LDL of 140 mg/dL.

  1. Step 1: Calculate Non-HDL: 220 - 50 = 170 mg/dL.
  2. Step 2: Calculate LDL/HDL Ratio: 140 / 50 = 2.8.
  3. Step 3: Analyze results: An LDL/HDL ratio under 3.0 is generally considered healthy and indicative of low cardiovascular risk.

Frequently Asked Questions