Waist to hip ratio calculator

Divide waist circumference by hip circumference using matching units.

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Waist to hip ratio calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Waist circumference

Hip circumference

Answer

…

Divide waist circumference by hip circumference using matching units.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

This reports only the measurement ratio, with no risk classification or diagnosis. Consistent measurement technique matters; no age- or sex-specific threshold is supplied.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Waist to hip ratio calculator

Divide waist circumference by hip circumference using matching units.

This reports only the measurement ratio, with no risk classification or diagnosis. Consistent measurement technique matters; no age- or sex-specific threshold is supplied.

Next: Waist to height ratio calculator

A worked example

Example inputs: waist circumference = 80, hip circumference = 100. Waist-to-hip ratio = 0.8.

Before you use the result

This reports only the measurement ratio, with no risk classification or diagnosis. Consistent measurement technique matters; no age- or sex-specific threshold is supplied.

Example results for waist circumference

These examples use Hip circumference: 100. They are reference calculations, not recommended settings.

Waist circumference	Waist-to-hip ratio
40	0.4
80	0.8
160	1.6

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ToolOctopus. “Waist to hip ratio calculator.” Updated 2026-09-26. https://tooloctopus.com/waist-to-hip-ratio-calculator.

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