Fitness
Calorie Calculator
Calculate your daily calorie needs based on age, weight, height, and activity level using the Mifflin-St Jeor equation.
Daily Calories Needed
β
How It Works
Uses the Mifflin-St Jeor equation to calculate Basal Metabolic Rate (BMR), then multiplies by activity factor to get Total Daily Energy Expenditure (TDEE).
Example
A 30-year-old man, 5'8", 170 lbs, moderately active needs ~2,700 calories/day to maintain weight.
Frequently Asked Questions
How many calories should I eat to lose weight?
Eating 500 fewer calories than your TDEE creates a ~1 lb/week deficit. Never go below 1,200 (women) or 1,500 (men) without medical supervision.
What activity level should I choose?
1.2 = desk job. 1.375 = light exercise 1β3 days/week. 1.55 = moderate 3β5 days. 1.725 = hard exercise 6β7 days. 1.9 = physical job + training.
How accurate is this?
Mifflin-St Jeor is accurate within Β±10% for most people. Individual metabolism varies based on genetics and other factors.