Estimate your resting energy and total daily calories in three quick steps using age, height, weight, and activity—free and instant.
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Step 1 — Enter your basics
Provide your age, height, and weight in the right units so the tool can estimate resting energy accurately—next, you'll set your activity level.
Step 2 — Select activity level
Choose how active your typical day is; that choice scales resting energy into a daily target dramatically—see how the calculator applies the multiplier next.
Step 3 — View resting and daily calories
The tool displays your resting (baseline) calories and the activity-adjusted daily number so you get two clear targets—learn how to interpret them in the next slide.
What the result really means
These numbers are estimates; muscle mass, health conditions, and diet changes can shift needs. Want to know when to trust the result and when to adjust?
Read the full calculator guide
Find step-by-step usage, calculation method, accuracy notes, and FAQs to apply your calorie target confidently.