Body Fat Calculator
Estimate body fat percentage using US Navy tape measure method. This body fat calculator is built for quick fitness calculations with clear inputs, instant results, and page content that explains what each answer means. The formula section below shows the exact calculation method so you can verify the result.
Body Fat Calculator Engine
Estimate body fat percentage using US Navy tape measure method.
How Body Fat Calculator Is Calculated
\text{Body Fat \%} = 495 / (1.0324 - 0.19077 \log_{10}(\text{waist}-\text{neck}) + 0.15456 \log_{10}(\text{height})) - 450Explanation: US Navy circumference method estimating body density.
Worked Calculation Examples
| Scenario | Result | Calculation Step |
|---|---|---|
| Male: 34in waist, 15in neck, 70in height | 16.2% Body Fat | Falls in the Fitness category (14-17% for men). |
How to Use the Body Fat Calculator
- Open the Body Fat Calculator and enter the values requested in the input fields.
- Check the units, percentages, dates, or time periods before reading the answer.
- Review the instant result and adjust any value to compare another scenario.
- Use the formula, example, and FAQs below to understand how the body fat calculator works.
Frequently Asked Questions
What is an ideal body fat percentage?
Fitness level for men is 14-17%; for women 21-24%.
How do I use this body fat calculator?
Enter the known values, review the units or settings, and the calculator updates the result instantly. The formula and example on this page show how the answer is produced.
What does the Body Fat Calculator calculate?
Estimate body fat percentage using US Navy tape measure method. It is designed for fast browser-based calculations without sign-up, downloads, or manual spreadsheet setup.
What formula does this body fat use?
This page uses the formula shown in the calculation section: \text{Body Fat \%} = 495 / (1.0324 - 0.19077 \log_{10}(\text{waist}-\text{neck}) + 0.15456 \log_{10}(\text{height})) - 450. The explanation below it defines the key inputs in plain language.
Is this body fat calculator free to use?
Yes. Calculate Like A Pro pages are free online tools and do not require an account to calculate or compare results.
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Last updated: August 14, 2026.