Fat Percentage Calculator
Calculate what percentage of a total is fat. Use for body composition (fat as % of weight) or nutrition (fat as % of food). Same units for both inputs.
e.g. total weight (kg) or total mass (g)
Same unit as total
What is Fat Percentage?
Fat percentage is the proportion of a total that is fat. Formula: (Fat Amount ÷ Total Amount) × 100. Use it for body composition (e.g. body fat % from weight and fat mass) or for nutrition (e.g. fat as % of food weight). Always use the same units for both inputs.
Frequently Asked Questions
How is fat percentage calculated?
Fat percentage = (Fat Amount / Total Amount) × 100. Use the same units for both (e.g. kg for weight, or grams for food). It shows what proportion of the total is fat.
What can I use the fat percentage calculator for?
Body composition (fat as % of body weight), nutrition (fat as % of food weight or calories), or any situation where you need to express fat as a percentage of a total.
Is this the same as body fat percentage?
For body weight, yes: body fat % is fat mass as % of total weight. This calculator is general and can be used for body fat or other contexts (e.g. fat content in food).
Is this calculator free?
Yes. Enter total amount and fat amount in the same units to get fat percentage. No registration required.
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<p>Calculator: <a href="https://onlinecalculator.co.uk/health/fat-percentage-calculator" target="_blank">Fat Percentage Calculator</a> - OnlineCalculator.co.uk</p>APA Style Citation:
OnlineCalculator.co.uk. (2025). Fat Percentage Calculator. Retrieved from https://onlinecalculator.co.uk/health/fat-percentage-calculatorNote: This calculator is free to use and reference. No permission required for educational or commercial citation.