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Calorie Calculator

Enter your age, height, weight and activity to see your daily calorie need and a macro starting point.

Mifflin-St JeorFreeNo sign-up

Your details

How it is calculated

BMR uses the Mifflin-St Jeor equation: 10×weight + 6.25×height − 5×age + 5 for men, −161 for women. Multiplying by an activity factor (1.2 – 1.725) gives total daily expenditure. Fat loss applies a 500 kcal deficit, muscle gain a 300 kcal surplus; the target never drops below 1,200 kcal.

The FitCi app uses the same formula and recalculates your target weekly as your weight changes (adaptive TDEE).

FitCi redoes this math for you every week

Tell FitCi your goal; it calculates calories and macros, builds your diet plan and adjusts as your weight changes.