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Calorie Deficit Calculator

Find out how long it will take to reach your weight loss goal at your current calorie deficit.

Formula v1.0.0GlobalMethodologycalorie-deficit-v1
How this is calculated
Days to goal = (weight to lose × 7,700 kcal/kg) ÷ daily deficit

Assumptions used in this calculation

  • Constant deficit: Assumes your maintenance calories and adherence stay constant, real-world weight loss often isn't perfectly linear.

About this calculator

Calculate your daily calorie deficit from your maintenance and target calories, and see how long it will take to reach a specific weight loss goal at that rate.

Worked example

2,200 kcal maintenance, 1,700 kcal target, 5kg to lose

Result: ≈ 11 weeks to goal

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