TDEE Calculator

Find out how many calories you burn per day - and exactly how many to eat for fat loss, maintenance, or muscle gain.

Knowing Your Number Is Step One

Hitting it every week is the hard part. KlickWay nutrition coaches build your plan around these exact targets - and adjust it as your body changes.

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How This TDEE Calculator Works

This calculator uses the Mifflin-St Jeor equation, the formula research has found most accurate for estimating resting metabolism. It works in two steps:

  • BMR (Basal Metabolic Rate): the calories your body burns at complete rest, estimated from your sex, age, height, and weight.
  • Activity multiplier: your BMR is multiplied by a factor between 1.2 (sedentary) and 1.9 (extra active) to account for training and daily movement.

The result is your maintenance number. From there we apply a 20 percent deficit for fat loss - aggressive enough to see weekly progress, conservative enough to protect muscle - or a 10 percent surplus for lean muscle gain.

TDEE Calculator FAQ

What is TDEE?

TDEE stands for Total Daily Energy Expenditure: the total calories you burn in a day, including workouts, daily movement, digestion, and basic body functions. Eat below it and you lose fat; eat above it and you gain.

How accurate is this calculator?

Formula-based estimates like Mifflin-St Jeor land within about 10 percent for most people. Treat the number as a starting point: track your intake and bodyweight for two to three weeks, then adjust by 100 to 200 calories based on real results.

How big should my calorie deficit be for fat loss?

We default to 20 percent below maintenance. That produces meaningful fat loss while preserving muscle and training quality. Bigger deficits usually backfire through muscle loss, fatigue, and rebound eating.

Should I recalculate my TDEE as I lose fat?

Yes. Your TDEE drops as your bodyweight drops. Recalculate after every 10 to 15 pounds of change, or whenever progress stalls for more than two weeks.