BMR Calculator - Mifflin-St Jeor Formula
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Calculate BMR using the modern Mifflin-St Jeor equation.
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What is BMR Calculator (Mifflin-St Jeor)?
Calculate your Basal Metabolic Rate - calories burned at rest. Uses Mifflin-St Jeor or Harris-Benedict formula. Our free online tool makes it easy to calculate calories burned at rest without installing any software. Simply use your browser to get started instantly.
Features
Mifflin-St Jeor formula (most accurate)
Harris-Benedict formula option
Activity level multipliers
Daily calorie needs by activity
How to Use BMR Calculator (Mifflin-St Jeor)
- 1Enter age, gender, height, weight
- 2Choose formula preference
- 3View BMR and activity-adjusted calories
Common Use Cases
- Accurate BMR
- Modern formula
- Research-backed
Why Use Our BMR Calculator (Mifflin-St Jeor)?
Fast & Free
Instant results with no signup or payment required.
Secure & Private
All processing happens in your browser. We never store your files.
No Installation
Works on any device with a web browser. No software needed.