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Nutrition

Calorie deficit calculator

Work out how many calories to eat to lose fat sustainably, using Mifflin-St Jeor (or Katch-McArdle if you know your body fat). The default deficit is moderate, on purpose.

Units
Sex
Age
yrs
Height
cm
Weight
kg
Body fat (optional)
%
Activity level?
Goal
How aggressive?

Your inputs are stored only on this device so we don't ask twice.

Results

Your target calories
kcal/day
Maintenance (TDEE)
kcal/day
Basal metabolic rate (BMR)
kcal/day

What moves this number isn't the math: it's your sleep, your training, and above all your adherence.

This is your planning baseline, not a guarantee. Most people who calculate this stall around week 3, because the number was never the hard part. Adherence, sleep and stress are.

Estimates for informational purposes. Not medical advice.