What is it & why use it?
Calculate your Basal Metabolic Rate (BMR) to know daily calorie needs for body maintenance. This tool on Calci.in helps you understand your body’s energy requirements.

Formula (explained)
BMR (Mifflin-St Jeor) = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + s
(s = +5 for men, –161 for women)
Variables: weight = body mass in kilograms, height = in centimeters, age = in years, gender-based constant s.

Example calculation
Male, 70kg, 175cm, 25yrs → BMR ≈ 1668 kcal/day.

Benefits & use cases
• Know daily calorie requirement
• Plan weight gain/loss
• Personalize fitness goals

Related calculators on Calci.in
BMI Calculator
Calorie Calculator
Protein Intake Calculator

External references (authority sources)
NIH – BMR Guide
Healthline – BMR

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FAQs
Q1: What is BMR?
A: It is the number of calories your body needs to function at rest.
Q2: Is BMR same for everyone?
A: No, it depends on age, gender, height, and weight.
Q3: Why is BMR important?
A: It helps you understand how many calories to maintain, lose, or gain weight.
Q4: Does BMR change with activity?
A: BMR is at rest; to get daily needs multiply by activity factor (TDEE).