RMR Calculator

IIFYM RMR Calculator

A human body doesn’t require any energy to store fat, but it does for muscle. That’s why most diets fail. Abrupt reduction in calorie intake leads to muscle and fat realignment.​

The IIFYM RMR Calculator is used to calculate one Resting Metabolic Rate which is very similar to ones BMR or Basal Metabolic Rate with a few differences. RMR is a very useful tool for flexible dieting with IIFYM techniques in mind.

The person that is flexible dieting quickly loses weight, muscle and fat. When normal consumption is resumed the weight quickly rebounds because the body is now burning fewer calories to sustain itself.

Your weight loss calories are based on your macro calculator numbers.

The IIFYM Macronutrient Calculator calculates your TDEE (Total Daily Energy Expenditure), then uses that to set the amount of calories you will be consuming while following the IIFYM diet for fat loss.

In order to lose weight (burn fat) you need to consume less calories than your body needs. A calorie deficit of 15-20% off of your TDEE is used as a safe caloric deficit to shoot for to insure fast fat loss without burning up your lean muscle mass.

To build muscle, you need to consume slightly more calories than your TDEE. This macro calculator uses a safe caloric surplus of 5-10% from our macro-nutrient calculator to consume in order to encourage muscle growth without packing on too much unwanted body fat.

This is where the IIFYM Calculator shines!