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Calcimator

Body Fat Percentage Calculator

Estimate your body fat percentage using the US Navy method. Determine your body composition category and fat vs lean mass.

Inputs

years
lbs
inches
inches
inches

Results

Body Fat (Navy Method)

17.5%

CategoryFitness
Fat Mass31.5 lbs
Lean Mass148.5 lbs
BMI25.8
BMI Body Fat Estimate21.7%

Body Fat (Navy Method)

17.5%

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Gender — Biological sex for calculation accuracy. Choose from: Male, Female. default: 1.
  3. Age — Age in years. Accepts values from 10 years to 100 years (default: 30 years).
  4. Weight — Body weight in the selected unit. Accepts values from 50 lbs to 500 lbs (default: 180 lbs).
  5. Height — Height in the selected unit. Accepts values from 36 inches to 96 inches (default: 70 inches).
  6. Waist Circumference — Measure at navel level. Accepts values from 15 inches to 80 inches (default: 34 inches).
  7. Neck Circumference — Neck circumference measurement. Accepts values from 8 inches to 30 inches (default: 15 inches).
  8. Expand "Advanced Options" for additional fine-tuning. These optional inputs let you model more specific scenarios:
  9. Hip Circumference — Required for female calculation. Accepts values from 20 inches to 80 inches (default: 0 inches).
  10. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  11. Body Fat (Navy Method) — shown as a numeric value. This is the primary result of this calculator.
  12. Category — your calculated result.
  13. Fat Mass — shown as a numeric value.
  14. Lean Mass — shown as a numeric value.
  15. BMI — shown as a numeric value.
  16. BMI Body Fat Estimate — Body fat percentage estimated from BMI using the Deurenberg formula — less accurate than direct measurement methods
  17. View the Body Composition below for a visual breakdown of how the numbers relate to each other.
  18. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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