Body Fat Percentage Calculator
Estimate body fat percentage using the Deurenberg equation, which derives body fat from BMI, age, and sex. Enter measurements in metric units to receive a quick screening value.
Screening estimate only—consult a healthcare professional for personalised body composition assessments.
Examples
- 70 kg, 175 cm, age 30, male ⇒ 18.22% body fat
- 60 kg, 165 cm, age 25, female ⇒ 24.22% body fat
- 82 kg, 180 cm, age 45, male ⇒ 25.20% body fat
FAQ
What does the gender input represent?
The Deurenberg equation uses 1 for males and 0 for females; this binary input adjusts the calculation for hormonal differences.
How accurate is this estimation?
It provides a population-based estimate. For precise measurement consider DEXA scans, hydrostatic weighing, or bioelectrical impedance analysis.
Do I need to know my BMI beforehand?
No. The calculator internally converts your height and weight into BMI before applying the Deurenberg formula.
Can I enter values in pounds and inches?
Convert your measurements to kilograms and centimetres first, or use a separate unit converter to ensure accuracy.
Why might my result differ from smart scale readings?
Home devices use electrical impedance which responds to hydration and muscle mass, so their readings fluctuate day to day.
Additional Information
- The formula first computes BMI (weight/height²) and then adjusts for age and gender to approximate body fat percentage.
- It is most accurate for adults between 18 and 60 years and may be less reliable for athletes or very lean individuals.
- If you prefer imperial measurements, convert pounds to kilograms and inches to centimetres before entering values.
- Typical healthy ranges: women 21–33% (ages 20–39) and men 8–19% (ages 20–39), according to the American Council on Exercise.