Calorie Deficit Calculator
Calorie Deficit Calculator
Explore a calorie target below maintenance.
How it works
A calorie deficit describes intake below expenditure. This tool illustrates the arithmetic of a percentage change; it does not predict how much weight you will lose.
Using this calculator
Enter maintenance calories from an estimate such as TDEE. Choose a decrease of 1–20%. The result shows the target and the amount subtracted.
What to keep in mind
Adults only; not for pregnancy, breastfeeding or managing an eating disorder. Outputs below 1,200 kcal are withheld as a tool guardrail. Values above it are not automatically safe or appropriate.
Sources & further reading
NIDDK · Body Weight Planner ↗Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.