Home › Calculators › Calorie Calculator
Calorie Calculator
Enter age, sex, height, weight and activity level to get your BMR (calories at complete rest) and TDEE (total daily needs) — plus the daily targets for steady weight loss or gain. Uses the Mifflin-St Jeor equation, the most validated formula available.
BMR vs TDEE
BMR is what you would burn lying in bed all day. TDEE multiplies BMR by an activity factor (1.2 sedentary → 1.9 very active) for real life.
The ±500 rule
Eat about 500 kcal below TDEE to lose roughly 0.5 kg a week, or 500 above to gain it. Bigger gaps work faster but are harder to sustain.
Mifflin-St Jeor vs Harris-Benedict
Both estimate BMR; Mifflin-St Jeor (1990) validates better against modern measurements, which is why this tool uses it.
Frequently Asked Questions
What is BMR?
Basal Metabolic Rate — the calories your body burns at complete rest to keep you alive.
How many calories should I eat to lose weight?
Roughly TDEE minus 500 per day for about 0.5 kg a week. The tool computes your number above.
Related Tools
Age Calculator — Your exact age in years, months and days — plus days lived and next birthday.
BMI Calculator — Body Mass Index with WHO weight categories — metric or imperial.
Mortgage Calculator — Monthly payment, total interest and payoff date for any home loan.
Loan EMI Calculator — EMI, total interest and total payable for car, personal and home loans.
Compound Interest Calculator — See what your money becomes — compound growth at any frequency.
Fraction Calculator — Add, subtract, multiply and divide fractions — mixed numbers welcome.
Fraction, Decimal & Percent Converter — Any one form in — all three forms out, fractions properly simplified.
Body Fat Calculator — US Navy tape-measure method — body fat % from a few measurements.
Weight Loss Calculator — A realistic weekly plan — weight to lose, daily deficit, target date.
Decimal Calculator — Exact decimal arithmetic — no 0.30000000000000004 surprises.
Recurring Deposit Calculator — RD maturity value with quarterly compounding, the bank way.
Percentage Calculator — X% of Y, X as a % of Y, and percent change — three tools in one.
Variance & Statistics Calculator — Mean, median, mode, variance and standard deviation in one paste.
Ratio Calculator — Simplify ratios and solve for the missing part.
Budget Calculator (50/30/20) — Split your take-home pay into needs, wants and savings.
Prime Number Calculator — Is it prime? Prime factors and full prime lists up to a million.
Target Heart Rate Calculator — Karvonen training zones from your age and resting heart rate.
Savings Calculator — What monthly savings become — future value with compound growth.
Date Calculator — Add or subtract days from any date, and find the days between two dates.
Corrected Calcium Calculator — Correct total calcium for low albumin — the standard bedside formula.
A1C to Average Glucose Calculator — Convert HbA1c % into estimated average glucose (eAG) — mg/dL and mmol/L.