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How many calories do you need? Put in your numbers and see your range

How many calories do you need? It depends on your size, age and how much you move, and no formula gets it exactly right.

Put in your age, weight, height and activity and see a realistic range with the formula shown, how much goes on resting versus moving, and what it looks like across a day. Estimates only, not medical advice. The guide also says when to ask a doctor or dietitian first.

Sun 18 Oct 2026

A donut chart showing about 2,000 kcal split into resting energy and movement

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