Example 1
- Waist: 80 cm
- Hip: 100 cm
0.80
80 cm waist and 100 cm hip gives 0.80.
Waist to hip ratio calculator
Measure waist and hip with the same tape, type both girths, and click Calculate. Eighty centimeters of waist on 100 cm of hip is 0.80. There is no weight and no height in this calculator.
WHR = waist / hip. Mass over height squared lives on the BMI calculator. Girth body fat is on the US Navy method.
Result
Waist (cm) and Hip (cm). WHR shows up here.
How it works
WHR comes from two tape numbers. You divide waist circumference by hip circumference and keep two decimal places. Eighty centimeters of waist and 100 cm of hip give 0.80, because 80 / 100. Ninety on the same 100 cm is 0.90. Seventy on 95 cm rounds to 0.74. The result is a ratio, so kilograms and height never enter the math.
People often land here instead of BMI because they want something other than a scale. This calculator does not replace body mass index. BMI needs weight and height. Here two girths are enough. The Navy method also uses the waist, but it estimates body-fat percent from the neck and, for women, the hip with a different formula. On this page the hip is only the denominator.
Keep the tape level, without sucking in the belly and without a slack loop. Measure the waist at the narrowest point or at navel height. Measure the hip at the widest part of the buttocks. The two waist schools shift the ratio a little, so pick one spot and reuse it. The US switch converts inches with 2.54. If both fields use the same unit, 80 over 100 stays 0.80.
The formula does not cap the result at 1. One hundred two centimeters of waist on 98 cm of hip is about 1.04. Eighty-eight on 92 is 0.96. Eighty-five on 105 is 0.81. Seventy-five on 90 is 0.83. Ninety-five on 110 is 0.86. Each pair is the same quotient with different tapes.
Papers sometimes quote bands near 0.90 for men and 0.85 for women. The calculator does not stamp those bands onto the result. You see the raw ratio. The comment about bands stays in the text so the number on the calculator does not pretend to be a finding.
Katch-McArdle and FFMI work from fat-free kilograms, not from WHR. Type waist and hip, then Calculate. The calculator example, 80 and 100, should come back as 0.80. Treat that number as girth arithmetic for a class, not as a metabolic diagnosis.
How to use
- Measure the waist at the narrowest point or at navel height, with the same tape you will put on the hips.
- Measure the hip at the widest part of the buttocks. Keep the tape level, without sucking in and without slack.
- Type both numbers in centimeters or inches, matching the units switch in the header.
- Click Calculate. An 80 cm waist and a 100 cm hip give 0.80, to two decimal places.
- If you want body-fat percent from girths, open the Navy method. This page stays with the waist-to-hip ratio alone.
Formula
WHR = waist / hip
Two decimal places. Not BMI and not a diagnosis.
WHR from waist and hip girths
Waist divided by hip, two decimals. 80 cm of waist on 100 cm of hip is 0.80. There is no weight in this calculator.
- WHR
- Waist-to-hip ratio: waist / hip. 80 / 100 = 0.80. A ratio of two girths, not BMI and not a diagnosis.
- Waist
- The waist field in cm. At 80 on 100 hip the result is 0.80. Same tape as the hip, with no scale.
- hip
- The hip field in cm, the denominator. 100 cm with waist 80 is 0.80; a larger hip at the same waist lowers WHR.
Examples
Example 2
- Waist: 90 cm
- Hip: 100 cm
0.90
90 cm over 100 cm gives 0.90, a band often quoted for men.
Example 3
- Waist: 70 cm
- Hip: 95 cm
0.74
70 over 95 gives about 0.74 to two decimals.
Example 4
- Waist: 88 cm
- Hip: 92 cm
0.96
88 over 92 gives about 0.96.
Example 5
- Waist: 85 cm
- Hip: 105 cm
0.81
85 over 105 gives about 0.81.
Example 6
- Waist: 102 cm
- Hip: 98 cm
1.04
102 over 98 gives about 1.04, waist wider than hip.
Example 7
- Waist: 75 cm
- Hip: 90 cm
0.83
75 over 90 gives about 0.83.
Example 8
- Waist: 95 cm
- Hip: 110 cm
0.86
95 over 110 gives about 0.86.
Frequently asked questions
What is WHR at an 80 cm waist and a 100 cm hip?
0.80, because 80 divided by 100. At 90 cm on the same 100 cm you get 0.90.
Does WHR replace BMI?
No. BMI is mass over height squared. There is no weight field and no height field here. You only type two girths.
Where do I put the tape on the waist?
Level, at the narrowest point or at the navel. Hips at the widest point. Use the same spot the next time you measure.
Can the ratio come out above 1?
Yes. 102 cm of waist on 98 cm of hip is about 1.04. The formula does not clip the ratio at 1.
Do inches change 0.80 for the same girths?
No, if both fields are in inches and match the same 80 and 100 cm. The 2.54 factor cancels in the quotient.
Is 0.90 in a man a verdict from this card?
The result is the ratio alone. 0.90 is 90 over 100. Commentary bands do not enter the result number.
How is WHR different from the Navy method?
Navy estimates body-fat percent from waist, neck, and hip in women. Here the hip is only the denominator, with no BF% formula.
What do I get at 70 cm on 95 cm?
About 0.74 to two decimals. 85 on 105 is 0.81, and 75 on 90 is 0.83.
Does Katch-McArdle take WHR instead of body-fat percent?
No. Katch needs fat-free kilograms or mass plus BF%. The ratio from this page does not go there.
Why two decimal places?
That is how the calculator rounds. 88 on 92 is 0.96, and 95 on 110 is 0.86. A longer fraction would not help the tape.
Knowledge sources
WHR is waist divided by hip. Cut-offs are often cited in WHO publications.
Page updated in 2026.