What is the BMI Calculator (lb, ft, in)?
Calculate BMI using US units — pounds, feet and inches. This version takes pounds, feet and inches directly, so US users avoid converting to metric before calculating body mass index.

How to use the BMI Calculator (lb, ft, in)
- Enter your weight, your height, your height.
- Results update automatically as you type; you can also press Calculate.
- Read the output: bmi, category (adult who), healthy weight range.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With weight = 160 lb, height = 5 ft, height = 9 in, the BMI Calculator (lb, ft, in) returns bmi: 23.6; category (adult who): Healthy weight; healthy weight range: 125 – 169 lb.
Where the BMI Calculator (lb, ft, in) helps in real life
Your doctor mentioned BMI at your last visit and you want to track it at home. Enter your weight in pounds and height in feet and inches to get the same figure used in clinics.
You are setting a weight goal. Trying a few target weights shows which BMI category each would fall in, helping you set a realistic aim.
Common mistakes to avoid
- Entering total inches in the feet field.
- Using BMI to judge muscular athletes, where it overestimates fatness.
- Comparing children’s BMI with adult categories.
- Treating BMI as a diagnosis rather than a screening number.
💡 Practical tip: BMI does not distinguish muscle from fat — the waist-to-height ratio calculator is a useful companion measure.

Tips for better results
- Weigh yourself at the same time of day for consistent tracking.
- Pair BMI with waist measurement for a fuller picture.
- Discuss results with a healthcare professional if you have concerns.
⚠️ This tool provides general information and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified healthcare professional.
Frequently asked questions
What does the BMI Calculator (lb, ft, in) do?
Calculate BMI using US units — pounds, feet and inches.
How is it calculated?
The BMI Calculator (lb, ft, in) uses this method: BMI = 703 × weight (lb) ÷ height (in)².
Can you show an example?
With weight = 160 lb, height = 5 ft, height = 9 in, the BMI Calculator (lb, ft, in) returns bmi: 23.6; category (adult who): Healthy weight; healthy weight range: 125 – 169 lb.
Is the BMI Calculator (lb, ft, in) accurate?
It uses standard published formulas and is tested against known values, but results are estimates for guidance. This tool provides general information and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified healthcare professional.
Is this tool free and private?
Yes — the BMI Calculator (lb, ft, in) is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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