About the calorie calculator
Your basal metabolic rate is the energy your body uses at rest. Multiplying by an activity factor estimates maintenance calories. This is an estimate, not medical advice.
Formula used
BMR (men) = 10w + 6.25h − 5a + 5; (women) = 10w + 6.25h − 5a − 161. Maintenance = BMR × activity.
How to use
Fill in the fields above and the results update instantly. Change any value to compare scenarios. Results are estimates for planning and education and may differ from figures provided by banks, tax offices or doctors.
Frequently asked questions
How many calories to lose weight?
A modest deficit of about 300–500 kcal/day is commonly suggested.
Is this medical advice?
No. Speak with a doctor or dietitian for personal plans.