Health & Fitness
Calorie Deficit Calculator - Weight Loss
Calculate daily calorie targets based on your desired deficit.
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What is a calorie deficit?
It is when you consume fewer calories than you burn each day.
How big should my deficit be?
Many people start with 300-500 kcal per day, but needs vary.
Does this account for exercise?
Use your maintenance calories from the TDEE or Calorie Calculator.
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About this tool
This Calorie Deficit Calculator turns your inputs into practical results. Provide Maintenance calories and Daily deficit to calculate Target calories and Estimated weekly loss.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.