Scenario 1
Adult male
Male, 30 years, 75kg, 178cm → BMR = 10×75 + 6.25×178 − 5×30 + 5 = 1,808 kcal/day.
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BMR Calculator
Know how many calories your body burns just to survive — the foundation of any diet plan.
Adjust your inputs
Results update instantly as you type or drag.
20 – 300
100 – 250
15 – 100
0 – 1
Enter 1 for male, 0 for female
Quick insights
Calories per hour (rest)
72
Calories per week (rest)
12,023
Quick answer
What is BMR?
BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest. It accounts for ~60–70% of total daily energy expenditure.
How it works
From inputs to result in four steps
A quick walkthrough of what this calculator does behind the scenes.
- 1
Enter your weight in kg.
- 2
Enter your height in cm.
- 3
Enter your age.
- 4
Select sex (1 = male, 0 = female) — affects the formula constant.
Formula
The math behind the number
No black box — here's exactly how the result is computed.
Formula (Mifflin-St Jeor)
Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161Examples
Real-world scenarios
See how the numbers play out for typical use cases.
Scenario 2
Adult female
Female, 28 years, 62kg, 163cm → BMR = 10×62 + 6.25×163 − 5×28 − 161 = 1,400 kcal/day.
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