A practical tool, a clearer next step

Calorie Deficit Calculator

Explore how a chosen percentage changes a maintenance-calorie estimate.

Enter a maintenance estimate from the TDEE calculator and explore a modest percentage difference. The 1200 kcal display floor is a tool constraint, not a safe minimum for every person. Energy needs change; these arithmetic scenarios do not predict weight loss or a goal date.

Method and source

For adults. These educational estimates are not a prescription, diagnosis or a plan for pregnancy, breastfeeding or a medical condition.

How to interpret the result

The calculation is arithmetic, not a weight-loss forecast. It does not predict the date you will reach a target weight.

Keep the context

Choose the next guide for the question you are trying to answer.

Keep a dated progress-photo history

Explore saved check-ins and comparisons in LeanLens. History and full reports depend on your plan.

All body composition tools

Choose another tool by input and task.

Understand body composition

Read the method and limitations before drawing a conclusion.

Common questions

Will this predict weekly fat loss?

No. Energy expenditure and body weight change over time. A static calorie difference is not a guarantee of a particular rate of fat loss.