Free tool
Calorie calculator
Estimate how many calories you use in a typical day. Everything runs in your browser, and nothing you enter is stored or sent.
Estimated daily calories to maintain your weight
2,210 kcal
- Resting energy (BMR)
- 1,430 kcal
- Maintenance − 250 kcal
- 1,960 kcal
- Maintenance − 500 kcal
- 1,710 kcal
This is an estimate of the average for people like you, not a prescription. Intakes below about 1,200 kcal a day are best planned with a doctor or registered dietitian.
Split these calories into macrosHow the estimate is calculated.
Resting energy uses the Mifflin-St Jeor equation: 10 × weight in kg + 6.25 × height in cm − 5 × age, then +5 for men or −161 for women. The result is multiplied by a standard activity factor from 1.2 (mostly sitting) to 1.9 (extremely active).
Source: Mifflin MD, St Jeor ST et al. A new predictive equation for resting energy expenditure in healthy individuals. American Journal of Clinical Nutrition, 1990.
Questions about calorie needs.
How does this calorie calculator work?
It estimates resting energy use with the Mifflin-St Jeor equation, then multiplies it by an activity factor to estimate the calories you use in a typical day.
How accurate is the estimate?
Equations like Mifflin-St Jeor estimate a group average. Your actual needs can be several hundred calories higher or lower. Track your intake and weight for a few weeks and adjust from there.
Who should not use this calculator?
It is meant for adults. Do not use it during pregnancy or breastfeeding, if you are under 18, or if you have or have had an eating disorder. Ask a doctor or registered dietitian for a personal target.
See what you actually eat.
Log meals in BiteRight with a photo, your voice or text, and compare your intake with your estimate. Nutrient values are estimates; see how accurate they are.
