BMR Calculator
Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure
// BMR
Basal Metabolic Rate is the number of calories your body burns at complete rest — just to keep you alive (breathing, circulation, cell production). It accounts for 60-75% of daily energy expenditure.
// TDEE
Total Daily Energy Expenditure = BMR × activity multiplier. This is how many calories you actually burn per day including exercise. Eat below TDEE to lose weight, above to gain.
// Mifflin-St Jeor
This calculator uses the Mifflin-St Jeor equation, considered the most accurate BMR formula for most people. It replaced the older Harris-Benedict equation.
// The 500 Rule
A deficit of ~550 calories/day leads to roughly 0.5kg (1lb) of weight loss per week. Don't go below 1,200 cal/day (women) or 1,500 cal/day (men) without medical supervision.
// How to Use Online BMR Calculator
- Enter or paste your source data into the tool input.
- Click the primary action button to run Online BMR Calculator.
- Review the output, then copy or export your result.
// FAQ: What does Online BMR Calculator do?
Online BMR Calculator helps you calculate your basal metabolic rate and total daily energy expenditure in your browser with instant results.
// FAQ: How do I use Online BMR Calculator?
Paste or type your input, choose the needed action, and copy the generated output when the result is ready.
// FAQ: Is my data safe when using Online BMR Calculator?
Yes. Processing runs in your browser session for this page, so your content is not uploaded by this tool workflow.
// FAQ: Can I use Online BMR Calculator on mobile devices?
Yes. Online BMR Calculator works on modern mobile browsers, so you can run it from phones and tablets.