Calorie Calculator

Estimate daily calorie targets with US/metric units and Mifflin or Harris–Benedict formulas.

The Calorie Calculator estimates daily energy needs from age, sex, height, weight, and activity. Use it to set a rough maintenance target, then adjust with a clinician or coach if you have medical constraints. What this calculator does Most calorie tools estimate basal needs, then scale by activity to approximate total daily energy expenditure (TDEE). That becomes a starting point for maintenance, cut, or surplus goals. Results are estimates. Real needs vary with NEAT, training, hormones, and measurement error in food tracking. How to use the result Treat the number as a 2–4 week experiment: track weight and energy, then nudge calories up or down. Large aggressive deficits are harder to sustain and can backfire. Related tools on Simple Calculators (BMR, TDEE, macro) help you dig into pieces of the same problem.