Calorie Calculator
Estimate how many calories you burn per day, and what to eat to lose, maintain or gain weight.
How this is calculated
We use the Mifflin-St Jeor equation to estimate your basal metabolic rate, then multiply it by an activity factor between 1.2 (mostly sitting) and 1.9 (athlete) to get total daily energy expenditure.
A deficit of roughly 550 kcal per day corresponds to about 0.5 kg of fat loss per week. Very low intakes are rarely sustainable, so DietGPT never recommends dropping below sensible calorie floors.
These results are estimates for healthy adults. They are not medical advice. Speak to a doctor or registered dietitian before making significant dietary changes.