Calculate hip-to-waist ratio or find the missing hip or waist measurement from the other value and ratio using inches, cm, ft, or m.
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Hips to Waist Ratio Formula
The hips to waist ratio compares your hip measurement to your waist measurement. Select the quantity to solve for, then enter the other two values. All measurements and ratios must be positive.
- HWR = hips to waist ratio, written as hip:waist
- H = hip measurement
- W = waist measurement
The ratio is unitless, so the hip and waist measurements must be in the same unit before the ratio is calculated. If you enter different units, the calculator converts both measurements to meters first, performs the calculation, then converts the missing measurement to your selected result unit.
- Calculate ratio: uses HWR = H / W when hip and waist measurements are entered.
- Calculate hip measurement: uses H = HWR * W when waist and ratio are entered.
- Calculate waist measurement: uses W = H / HWR when hip and ratio are entered.
Ratio Meaning and Unit Conversion Reference
Use this table to understand what the result means mathematically. This calculator uses hip divided by waist, which is the inverse of the more common waist-to-hip ratio.
| Hips to waist ratio | What it means | Example |
|---|---|---|
| Greater than 1.00 | Hip measurement is larger than waist measurement. | 40 in hips / 32 in waist = 1.25 |
| Equal to 1.00 | Hip and waist measurements are the same. | 36 in hips / 36 in waist = 1.00 |
| Less than 1.00 | Waist measurement is larger than hip measurement. | 34 in hips / 38 in waist = 0.8947 |
| Unit | Conversion to inches | Example |
|---|---|---|
| Inches | in × 1 | 32 in = 32 in |
| Centimeters | cm ÷ 2.54 | 80 cm = 31.4961 in |
| Feet | ft × 12 | 3 ft = 36 in |
| Meters | m ÷ 0.0254 | 1 m = 39.3701 in |
Example Calculations
Example 1: Calculate the hips to waist ratio
You enter a hip measurement of 40 inches and a waist measurement of 32 inches.
The hips to waist ratio is 1.25.
Example 2: Calculate the missing waist measurement
You enter a hip measurement of 100 cm and a hips to waist ratio of 1.20.
The waist measurement is 83.3333 cm.
FAQ
Is hips to waist ratio the same as waist-to-hip ratio?
No. Hips to waist ratio is hip measurement divided by waist measurement. Waist-to-hip ratio is waist measurement divided by hip measurement. They are inverses of each other.
For example, if your hips are 40 inches and your waist is 32 inches, your hips to waist ratio is 40 / 32 = 1.25. Your waist-to-hip ratio would be 32 / 40 = 0.80.
Does it matter which unit I use?
No, as long as both measurements describe the same body dimensions. The final ratio has no unit. If you enter hips in centimeters and waist in inches, the calculator converts the measurements to the same base unit before calculating the ratio.
How should you measure hips and waist?
For a consistent WHO measurement method, measure waist halfway between the lowest rib you can feel and the top of your hip bone, after breathing out normally. Measure hips around the fullest part of the buttocks. Stand with feet together and arms relaxed; keep the tape horizontal and snug without pressing into the skin. The hip divided by waist result is a mathematical comparison, not a health or body-fat assessment.
