What is BMR?
BMR is the energy your body uses at complete rest to support essentials such as breathing and circulation.
BMR Calculator
Why it helps
It gives you a baseline for estimating daily calorie needs before activity is included.
Your BMR
– kcal/day
This is what you'd burn lying in bed all day. Add activity to get your total daily needs.
How this result was calculated
BMR uses your weight, height, age, and sex in the Mifflin–St Jeor equation.
Numbers are a starting point.
Gram Fit turns them into a plan that adapts every week. Log meals in seconds and get AI coaching toward your goal.
These calculators give general estimates for educational purposes and are not medical advice. Talk to a doctor or dietitian before making significant changes, especially during pregnancy or with a health condition.