The Calorie Calculator estimates the number of calories you need daily based on your age, gender, height, weight and activity level. Modify values and click calculate.

Food Energy Converter

Convert between Calories and other common food energy units.

About This Calculator

This Calorie Calculator is based on several equations:

Mifflin-St Jeor Equation:

For men: BMR = 10W + 6.25H – 5A + 5

For women: BMR = 10W + 6.25H – 5A – 161

Revised Harris-Benedict Equation:

For men: BMR = 13.397W + 4.799H – 5.677A + 88.362

For women: BMR = 9.247W + 3.098H – 4.330A + 447.593

Katch-McArdle Formula:

BMR = 370 + 21.6(1 – F)W

Where: W is body weight in kg, H is height in cm, A is age, F is body fat percentage

The results are multiplied by an activity factor (1.2-1.95) to estimate total daily energy expenditure.

Weight Loss Guidelines

• 1 pound (0.45 kg) ≈ 3,500 calories
• To lose 1 lb/week: Reduce daily calories by 500
• To lose 2 lbs/week: Reduce daily calories by 1,000
• Don’t reduce calories by more than 1,000/day without medical supervision
• Combine calorie reduction with exercise for best results