What Is BMR & TDEE Calculator?
The BMR and TDEE Calculator works out how many calories your body burns just to stay alive and how many it uses across a full day. It uses the Mifflin-St Jeor equation by default, but tick the body fat box and supply a percentage and it switches to Katch-McArdle, which works from lean mass instead, then tells you which formula produced the figure. Basal metabolic rate and total daily energy expenditure are reported as separate numbers so you can see exactly what your activity level adds on top.
Who Uses the BMR & TDEE Calculator?
People tracking their weight, athletes setting a calorie target, and students studying nutrition use it to turn body measurements into a daily calorie figure. Trainers and dietitians treat the output as a rough starting point when discussing intake with a client.
How to Use the BMR & TDEE Calculator
- Use the units buttons to pick Metric (kg and cm) or Imperial (lb and inches), choose Male or Female, then fill in Age, Weight and Height.
- Select your activity level from the dropdown, ranging from Sedentary (x1.2) to Extra active (x1.9), and tick the body fat checkbox and enter a percentage if you know one.
- Press the calculate button to read the basal rate, the maintenance rate, the formula used, and the calories per day your activity accounts for.
Why Choose Our BMR & TDEE Calculator?
- Mifflin-St Jeor by default, with Katch-McArdle applied as soon as you supply a body fat percentage, and the result names the formula it used
- Reports BMR and TDEE separately plus the difference between them, so the cost of your chosen activity level is visible rather than hidden
- The activity dropdown describes each level in plain terms, from little or no exercise and a desk job through to very hard training twice a day
- Pounds and total inches are converted internally, so you can type in imperial measurements without doing the arithmetic yourself
Try the BMR & TDEE Calculator above — it is free, fast, and works on any device. Bookmark this page to return whenever you need it.