Free Weight Loss Calculator

Focus Fuel Fire Fitness Calculator

Enter your numbers. Get a science-based goal date, daily calorie target, and a week-by-week trajectory - powered by the Mifflin-St Jeor equation that registered dietitians use.

Your numbers

Your timeline

Enter your numbers and hit calculate to see your goal date and daily calorie target.

You'll hit your goal on
-
-
BMR
- cal
TDEE
- cal
Daily Target
- cal
Total Loss
- lbs
-
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The Math

How this calculator works.

No magic. The same formulas dietitians use, applied to your specific numbers.

Step 01

BMR via Mifflin-St Jeor

Calories your body burns at complete rest, based on your weight, height, age, and sex. The clinical gold standard for resting metabolism.

Step 02

TDEE via activity factor

Your BMR multiplied by your activity level - the total calories you burn in an average day including movement and exercise.

Step 03

Deficit × weeks

1 lb of fat = ~3,500 cal. Your daily deficit determines weekly loss. Multiply by pounds-to-lose and you've got your goal date.

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