Health & Fitness

Waist-to-Hip Ratio Calculator

Divide waist by hip (in cm) to get your waist-to-hip ratio, compared against a sex-specific threshold (0.9 male, 0.85 female). An 85 cm waist and 100 cm hip for a man gives 0.85, flagged low risk.

What this calculator does

The Waist-to-Hip Ratio Calculator estimates your result instantly from the values you enter, using standard health & fitness formulas. Divide waist by hip (in cm) to get your waist-to-hip ratio, compared against a sex-specific threshold (0.9 male, 0.85 female). An 85 cm waist and 100 cm hip for a man gives 0.85, flagged low risk. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.

Waist-to-Hip Ratio Calculator

Result

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Waist-to-Hip Ratio

About Waist-to-Hip Ratio Calculator

The Waist-to-Hip Ratio Calculator divides waist by hip and compares the result to a sex-specific threshold the tool applies: 0.9 for men and 0.85 for women. Choose a sex and enter both measurements in centimetres.

Formula & Mathematical Calculation

Waist-to-Hip Ratio = f(Sex, Waist (cm), Hip (cm))

Calculated according to standard health formulas implemented in the calculator core.

Calculation Example

Select Male, enter Waist 85 cm and Hip 100 cm. The tool computes 85 / 100 and shows a Waist-to-Hip Ratio of 0.85, flagged as low risk because it is at or below the male threshold of 0.9.

Key Benefits

  • Computes waist-to-hip ratio to three decimals
  • Applies a different threshold for men and women
  • Labels the result as low or elevated risk for that sex
  • Needs only sex, waist, and hip

How to Use this Calculator

  1. Select sex
    Choose Male or Female to set the threshold.
  2. Enter measurements
    Type Waist (cm) and Hip (cm).
  3. Calculate
    Click Calculate and read the Waist-to-Hip Ratio and its risk label.

Assumptions & Limitations

What the calculation assumes

  • Every value you enter is treated as an exact, known amount.
  • Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
  • Results use standard published formulas and account only for the values entered above.
  • Rounding is applied for display; the underlying calculation uses your full precision.
  • Results are returned in the same units you enter, unless the tool states the output unit.

What it does not cover

  • Waist-to-Hip Ratio Calculator produces a calculated result for reference and learning, not a certified or official measurement.
  • Real-world outcomes differ when tolerances, rounding rules or local standards apply.
  • Definitions and standards vary by region and change over time; verify the convention that applies to your case.
  • Figures are only as accurate as the inputs you supply — check them before acting on the result.
  • For work where the result carries real consequences, confirm it against an authoritative source.

Frequently Asked Questions

0.9 for men and 0.85 for women. At or below the threshold is labelled low risk; above it is elevated risk.

Sex only selects which threshold the ratio is compared against; the ratio itself is waist divided by hip.

Waist and hip in centimetres; the ratio is unitless and shown to three decimals.

Hip must be positive, or the tool shows an error rather than a ratio.

Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.