Waist-to-Height Ratio Calculator
Check whether your waist is less than half your height, a simple health marker.
Enter your values to see the result.
These results are estimates for general information, not medical advice. Body shape, muscle mass, age, ethnicity and health conditions all affect what is right for you, so talk to a doctor or dietitian before making health decisions.
Processing and privacy
Processing varies by tool. Check the instructions for local processing, server requests, external services and any file or request limits before entering sensitive information.
Read the privacy policyHow this calculation works
Understand the method, inputs and limits behind your result.
- Formula
- Ratio = waist circumference / height, using the same length unit. Percentage of height = ratio × 100.
- Variables
- Units: Metric, Imperial
- Waist circumference
- Waist circumference
- Height
- Height (feet)
- Inches
- Units
- Waist circumference: cm
- Waist circumference: in
- Height: cm
- Height (feet): ft
- Inches: in
- Example
- Someone who is 175 cm tall should keep their waist under 87.5 cm. With an 85 cm waist, their ratio is 0.49, inside the healthy range.
- Assumptions
- These results are estimates for general information, not medical advice. Body shape, muscle mass, age, ethnicity and health conditions all affect what is right for you, so talk to a doctor or dietitian before making health decisions.
- Source
- ToolzHive calculation guide and calculator implementation. External reference verification is pending.
- Last reviewed
- Review date not yet recorded.
Methodology & References
The method depends on the selected model and input options. Review the assumptions and references above before interpreting the result.
- Choose metric or imperial units.
- Measure your waist halfway between your lowest rib and the top of your hip bone, and enter your height.
- Read your ratio and risk band, and the waist size you should stay under.
Interpretation and limitations
- What is a healthy waist-to-height ratio? A ratio from 0.40 to 0.49 is generally considered healthy. From 0.50 to 0.59 means increased risk, and 0.60 or more means high risk.
- Does it work for everyone? It works well for most adults and is often used for children over five too. It is less meaningful during pregnancy.
- Why use it instead of BMI? BMI does not show where fat is stored. Fat around the organs in the abdomen is the most harmful kind, and waist size measures it more directly.
References
External reference verification is pending. The formula and examples describe the current ToolzHive implementation.
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Clear instructions
Find steps, examples and limitations below.
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How to use the Waist-to-Height Ratio Calculator
The waist-to-height ratio divides your waist size by your height. It is one of the simplest and most useful health measures: guidance from the UK's NICE and many researchers says to keep your waist to less than half your height. Because it measures belly fat, it predicts risks like heart disease and diabetes well for adults of any height.
- 1 Choose metric or imperial units.
- 2 Measure your waist halfway between your lowest rib and the top of your hip bone, and enter your height.
- 3 Read your ratio and risk band, and the waist size you should stay under.
Example and practical tips
Someone who is 175 cm tall should keep their waist under 87.5 cm. With an 85 cm waist, their ratio is 0.49, inside the healthy range.
Frequently asked questions
What is a healthy waist-to-height ratio?
A ratio from 0.40 to 0.49 is generally considered healthy. From 0.50 to 0.59 means increased risk, and 0.60 or more means high risk.
Does it work for everyone?
It works well for most adults and is often used for children over five too. It is less meaningful during pregnancy.
Why use it instead of BMI?
BMI does not show where fat is stored. Fat around the organs in the abdomen is the most harmful kind, and waist size measures it more directly.
Practical guides
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How to Use Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio and check the simple health rule: keep your waist to less than half your height. Free WHtR calculator with risk levels.
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