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Use our free Basal Energy Expenditure calculator to estimate your daily calorie needs at rest. Get your BEE result with a simple formula and example.
| Sex | Formula |
|---|---|
| Male | 66.473 + (13.7516 × Weight kg) + (5.0033 × Height cm) − (6.755 × Age) |
| Female | 655.0955 + (9.5634 × Weight kg) + (1.8496 × Height cm) − (4.6756 × Age) |
Your body needs energy all day, even when you rest. It uses this energy to breathe, pump blood, and keep your organs working. This is called basal energy expenditure, or BEE.
Our free Basal Energy Expenditure calculator helps you estimate this daily need. Enter your age, sex, weight, and height to get your result in calories per day. It’s a simple way to learn how much energy your body needs at rest.
Basal Energy Expenditure is the energy your body uses at rest. It helps keep you alive and supports basic body functions.
BEE is closely linked to basal metabolic rate (BMR). Many people use these terms in a similar way. Your result can help you learn about your body’s energy needs. However, it doesn’t show how many calories you burn in a full day.
Our calculator uses the original Harris-Benedict formula. It estimates BEE based on your age, weight, height, and sex.
BEE = 66.473 + (13.7516 × weight in kg) + (5.0033 × height in cm) − (6.755 × age in years)
BEE = 655.0955 + (9.5634 × weight in kg) + (1.8496 × height in cm) − (4.6756 × age in years)
These formulas give an estimate in kilocalories per day (kcal/day). They don’t measure your metabolism directly.
Follow these five steps to get your result.
Check your details before you submit them. Even a small input error can change your result.
Let’s look at a simple example. A woman is 30 years old. She weighs 65 kg and is 165 cm tall.
Using the female Harris-Benedict formula:
BEE = 655.0955 + (9.5634 × 65) + (1.8496 × 165) − (4.6756 × 30)
BEE = 655.0955 + 621.621 + 305.184 − 140.268
BEE = 1,441.6325 kcal/day
Her estimated BEE is 1,442 kcal/day when rounded to the nearest whole number. This is the energy her body needs at rest, not her full daily calorie need.
Our free Basal Energy Expenditure calculator makes it easy to estimate your energy needs at rest. Use it to learn about your basal metabolic rate and daily calorie use.
If your goal is weight loss, remember that BEE is only one part of the picture. Your body also burns energy through movement, exercise, and digestion. A total daily energy expenditure (TDEE) estimate can help you understand your wider calorie needs. For personal advice, speak with a qualified health professional.
Use the Harris-Benedict formula for men or women. Enter your weight, height, and age into the matching equation. Our calculator does the math for you.
A BMR of 1,500 kcal/day does not mean you should eat only 1,500 calories. Your full daily needs also depend on activity and other factors. Estimate your TDEE before setting a calorie goal.
There is no single ideal BMR. It varies with age, sex, body size, and body makeup. A higher or lower result does not always mean better or worse health.
No online BMR calculator is exact for everyone. The Harris-Benedict formula gives an estimate based on common body measures. Indirect calorimetry can measure energy use at rest in a clinical setting.
Use the female Harris-Benedict formula with weight in kg, height in cm, and age in years. You can also enter these details into our Basal Energy Expenditure calculator for a quick result.
Yes, it can help you understand your energy needs at rest. But weight loss plans should account for your total daily energy use, not BEE alone. Avoid setting a calorie target from BEE without considering your full needs.