Free fitness calculators

Quick answers to the numbers everyone asks about. No sign-up needed.

TDEE & Calorie Calculator

Work out your BMR, TDEE and daily calorie target to lose fat, maintain or build muscle, with protein, carbs and fat. Free, no sign-up.

Protein Calculator

How much protein you need a day to build muscle or keep it while losing fat, and how to split it across your meals. Free, no sign-up.

1RM Calculator

Estimate your one-rep max from any set, with a percentage chart and how many reps you can do at each weight. Free, no sign-up.

Your numbers, kept up to date

RepFuel sets your calorie and protein targets from your stats, then learns your real TDEE from your food log and weight trend. Free, works on any phone, no app store needed.

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