How to use the Calorie Calculator
- Choose metric or imperial and enter your sex, age, height and weight.
- Pick the activity level that matches a typical week.
- Read your BMR and TDEE, and the daily calories for each goal.
BMR and TDEE
BMR (basal metabolic rate) is what your body burns at complete rest. This calculator uses the Mifflin–St Jeor equation, the most accurate of the common formulas for most people: 10 × kg + 6.25 × cm − 5 × age + 5 for men and … − 161 for women. TDEE (total daily energy expenditure) multiplies BMR by your activity level — it’s roughly what you can eat to keep your weight steady.
Calories for weight goals
A deficit of about 500 calories a day works out to roughly 0.5 kg (1 lb) a week, though real-world loss varies and slows over time. Most guidelines advise not going below about 1,200 calories a day for women or 1,500 for men without medical supervision; the table flags targets below that.
Check your weight category with the BMI Calculator, or convert kilograms and pounds with the Unit Converter.
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Tools that pair well with the Calorie Calculator
- Age Calculator — Enter a date of birth to get the exact age in years, months and days — plus total days and weeks lived, the weekday you were born on, a countdown to the next birthday and your star sign.
- Percentage Calculator — Seven everyday percentage calculations on one page.
- Due Date Calculator — Estimate your due date from the first day of your last period, your conception date or an IVF transfer — and see how many weeks pregnant you are, your trimester and the key dates ahead.
- Roman Numeral Converter — Convert any number from 1 to 3,999,999 into Roman numerals — or read Roman numerals back as numbers — with a breakdown of every symbol.