TDEE Calculator
TDEE (Total Daily Energy Expenditure) is roughly how many calories you burn per day, including activity. We use the Mifflin-St Jeor equation — the most validated formula for most adults.
How accurate is a TDEE formula?
Formulas estimate within ±10–15% for most people. Your real number shows up in your weight trend over 2–3 weeks of consistent logging — which is exactly how FitAI's coach adjusts your targets.
Should I eat exactly my TDEE?
Eating around TDEE maintains weight. A moderate deficit below it loses weight; a moderate surplus above it gains. Extreme deficits backfire — sustainable beats fast.
Want a full plan built around these numbers?
Take the free 2-minute quiz — get calories, macros and a coach that adapts them to your real progress.
Build my free planThese calculators are for general wellness information only and are not medical advice. Consult a physician before major changes to diet or exercise.