The IIFYM calculator is the first diet calorie calculator of its kind. We developed the IIFYM macro calculator to become the most comprehensive and easy to use weight loss calculator for people following the IIFYM diet and flexible dieting for fat loss with IIFYM.

Our IIFYM calorie Calculator takes the guess work out of calculating macros for immediate fat loss.. All you have to do is enter your details, select your goals and retrieve your macros. Our diet calculator is the most accurate macro calculator there is, making tracking macros & IIFYM fat loss very easy.

Calories and Macros Made Easy with The IIFYM Calculator

Diet calories based on your fat loss goals

This Calorie Calculator is based on the Mifflin-St Jeor Equation which calculates basal metabolic rate (BMR), and its results are based on an estimated average. The basal metabolic rate is the amount of energy expended per day at rest.
For men: BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (y) + 5
For women: BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (y) - 161
Note: accurate determination of the calories you burn can only be accomplished by individual physiological testing

Now That You Have Your Target Macros, Use My Nutrition Facts Search Tool To Look Up The Macros For Your Favorite Foods!

To Learn More About Applying This Calculator To Your Diet & Nutrition, Check Out My Free Beginners Guide To Macro Nutrients and Diet