The result is a tape-measure estimate rather than a scan or clinical measurement.
Health calculator
Body Fat Percentage Calculator
Use consistent tape measurements to obtain a rough body-composition estimate.
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No account. Formula and assumptions are shown below.
Calculator inputs
Body fat percentage details
Formula & disclaimer
Men: 86.010 log₁₀(Abdomen−Neck) − 70.041 log₁₀(Height) + 36.76; Women: 163.205 log₁₀(Waist+Hip−Neck) − 97.684 log₁₀(Height) − 78.387
View assumptionsFormula reviewCalcs at Hand Editorial TeamVerified 28 August 2026 · automated checks included
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Result—
Projection
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Formula & details
Calculation
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How to read this result
Three useful checks, kept deliberately short.
A man measuring 175 cm tall, 38 cm at the neck and 88 cm at the abdomen: Convert centimetres to inches · Subtract neck from abdomen · Apply the male circumference equation.
Hydration, tape position, body shape and measurement technique can materially affect the estimate.
Formula and assumptions
Men: 86.010 log₁₀(Abdomen−Neck) − 70.041 log₁₀(Height) + 36.76; Women: 163.205 log₁₀(Waist+Hip−Neck) − 97.684 log₁₀(Height) − 78.387Take repeated measurements at the same anatomical points and use their average for better consistency.
Keep in mind: For adults and general tracking only. This estimate is not a diagnosis or a substitute for professional assessment.
Official sourcesU.S. Coast Guard Body Composition Program ↗
Produced byCalcs at Hand Editorial Team
Last formula check28 August 2026
Review methodKnown examples + boundary cases
Editorial and correction policy →