Basal Metabolic Rate Calculator
BMR Calculator
What is BMR?
Your Basal Metabolic Rate is basically the amount of energy your body burns every day just to stay alive. Even when you’re doing nothing — just sleeping or lying around — your body is working behind the scenes. It’s keeping your heart beating, your lungs breathing, your blood moving, and your body temperature steady.
If you’re curious how many calories your body needs at rest, our BMR Calculator can give you a pretty good estimate. It’s a handy starting point whether you want to lose weight, gain weight, or just keep things where they are.
Here’s how it works:
The calculator uses the Mifflin-St Jeor Equation — a method trusted by scientists. It figures out your BMR using your age, gender, height, and weight.
For Men:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
For Women:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) – 161
Frequently Asked Questions
Is BMR the same as Metabolism?
Nope, they’re not the same. BMR is just one piece of your whole metabolism—it’s basically the number of calories you burn when you’re completely at rest.
Why should I know my BMR?
When you know your BMR, you get a baseline for how many calories your body needs before you factor in workouts or anything else you do in a day.
Can my BMR change over time?
Absolutely. Stuff like your age, weight, how much muscle you have, and even your daily habits can affect your BMR.
Is a higher BMR better?
Having a higher BMR means you burn more calories while resting, but that’s not always a good thing for everyone. What’s healthy really depends on your body and your own goals.