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Body Fat Calculator

What is your body fat percentage? Enter your weight, height and age to get your body fat % using the scientific Deurenberg formula – no skinfold calipers needed.

✓ Gennemgået af Julian Bronski · opdateret juni 2026

Dine oplysninger

years
1480+
cm
100250+
kg
30300+

Resultat

Body fat (%)
Fat mass (kg)
Lean mass (kg)
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Sådan fungerer Body Fat Calculator

First, BMI is calculated: weight ÷ height(m)². Then the Deurenberg formula: BF% = 1.2 × BMI + 0.23 × age − 10.8 × sex − 5.4 (sex: 1 = male, 0 = female). Accuracy ±3–5 percentage points.

Ofte stillede spørgsmål

What is a normal body fat percentage?
For men, 10–20% is fit, 20–25% is normal. For women: 18–28% fit, 25–35% normal. Athletes often have 6–13% (men) or 14–20% (women).
How accurate is the BMI-based method?
The Deurenberg formula has an accuracy of ±3–5 percentage points. For more precise measurement, DEXA scan, hydrodensitometry or BIA scales are recommended.
Why is body fat percentage more important than weight?
Two people with the same weight can have very different body compositions. Muscle weighs more than fat – someone who exercises may be heavier but have less body fat.
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