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Waist-to-Hip Ratio Calculator.

Calculates the waist-to-hip ratio (WHR) by dividing waist circumference by hip circumference, a simple indicator of body fat distribution.

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Your inputs

How it works

  1. 1

    Measure waist at the narrowest point, usually just above the belly button.

  2. 2

    Measure hip at the widest part of the buttocks.

  3. 3

    Divide waist by hip to get the ratio.

waist / hip

Frequently asked questions

What is a healthy waist-to-hip ratio?

For women, a ratio below 0.85 is considered low risk; for men, below 0.90 is low risk. Higher ratios indicate more abdominal fat.

Why is waist-to-hip ratio important?

It helps assess fat distribution. Excess abdominal fat is linked to higher risk of cardiovascular disease and diabetes.

Can I use inches instead of centimeters?

Yes, as long as both measurements use the same unit, the ratio is unitless and remains the same.

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Waist-to-Hip Ratio

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Estimate for general guidance only — verify important decisions with an appropriate professional.

How it works

Calculates the waist-to-hip ratio (WHR) by dividing waist circumference by hip circumference, a simple indicator of body fat distribution.

  1. Measure waist at the narrowest point, usually just above the belly button.
  2. Measure hip at the widest part of the buttocks.
  3. Divide waist by hip to get the ratio.

Formulas

The math behind this calculator, written out so you can verify the result.

Waist-to-Hip Ratio

WHR = Waist circumference / Hip circumference

Divide the waist measurement by the hip measurement. Both should be in the same unit.

Example:

Input: Waist = 80 cm, Hip = 100 cm

Calculation: 80 / 100 = 0.80

Result: WHR = 0.80

Real-world use cases

Where this calculation shows up in everyday life.

Health risk assessment

Used by health professionals to estimate risk of obesity-related conditions.

Example: A WHR of 0.95 for a man indicates higher risk.

Fitness tracking

Track changes in body shape over time to monitor progress.

Example: Compare WHR before and after a fitness program.

Body composition analysis

Provides a simple measure of fat distribution without complex equipment.

Example: Use alongside BMI for a fuller picture.

Tips and common mistakes

Tips

  • Measure at the same time of day for consistency.
  • Use a flexible tape measure, not a metal one.
  • Keep the tape snug but not compressing the skin.
  • Repeat measurements twice and take the average.

Common Mistakes to Avoid

  • Measuring waist at the belly button instead of the narrowest point.
  • Measuring hip over clothing, which adds bulk.
  • Using different units for waist and hip.

Assumptions and limitations

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.