Health & Fitness

Body Fat Estimator

Estimate body fat percentage from body measurements.

Last validated: 2026-02-14

Body Fat Estimator approximates body fat percentage from body measurements and demographic inputs. It is useful for progress tracking in fitness routines. The tool provides directional estimates for trend monitoring over time. Use it consistently with the same measurement method for better comparability.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Body Fat Inputs

Estimate

Body fat %: 17.71

Category: Fit

How to use this tool

Enter required body measurements and profile details.
Run the estimator to compute body fat percentage.
Repeat periodically under similar conditions to track trend changes.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

Sex: male
Waist cm: 86.0
Neck cm: 38.0
Hip cm: 95.0
Height cm: 175.0
Body fat percent: 17.707592296405437

Expected Outputs

Waist cm: 86
Neck cm: 38
Hip cm: 95
Height cm: 175

Interpretation

Waist cm is 86.0. Use this as a decision input, not as a standalone conclusion.
Neck cm is 38.0. Use this as a decision input, not as a standalone conclusion.
Hip cm is 95.0. Use this as a decision input, not as a standalone conclusion.
Cross-check the result against one alternate input set to validate sensitivity.

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Scenario A

Sex

Waist cm

Neck cm

Hip cm

Height cm

Body fat percent

Scenario B

Sex

Waist cm

Neck cm

Hip cm

Height cm

Body fat percent

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