Calorie Deficit Planner

1 lb of body fat represents roughly 3,500 kcal. Calculate the daily deficit required for a target weight loss rate.

Target Loss (lbs/week)

JavaScript Required. Fallback logic: To lose 1 lb per week, you need a total weekly deficit of 3,500 kcal. Divided by 7 days, this is a daily deficit of 500 kcal below your Total Daily Energy Expenditure (TDEE).

Frequently Asked Questions

Is this data saved?

No. This tool runs entirely in your browser. Refreshing the page clears all inputs.

Are there known limitations?

Yes. Mathematical models (like 1RM or Caloric Deficit) are estimates based on standard population averages. Individual metabolic variance is significant.

Common Mistakes

Over-estimating the precision of the output.
Failing to account for non-linear variables.
Relying on estimates instead of empirical testing over time.

Data Note: Baseline formulas sourced from peer-reviewed sports science and metabolic journals, aggregated Q3 2024.