BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation. See your TDEE at different activity levels. Supports imperial and metric units. All calculations happen client-side.
How to Use the BMR Calculator
- Select your preferred unit system (imperial or metric).
- Choose your gender.
- Enter your age, weight, and height.
- View your BMR and TDEE at five different activity levels.
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs at complete rest to maintain basic life-sustaining functions like breathing, circulation, and cell production. The Mifflin-St Jeor equation is considered the most accurate BMR formula for most people.
Features
- Mifflin-St Jeor equation (most accurate modern formula)
- Imperial and metric unit support
- TDEE at 5 activity levels
- One-click copy results to clipboard
- 100% client-side -- no data sent to any server
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Disclaimer: This tool is provided as-is for informational and educational purposes only.