How to use it
- Select your gender.
- Enter weight, height, and age.
- Click Calculate.
- View your BMR in kcal/day.
What it does – This tool applies the 1984 Revised Harris‑Benedict equation to turn your gender, weight, height, and age into a daily calorie estimate called Basal Metabolic Rate (BMR). Why it matters – BMR is the energy your body uses at complete rest; knowing it lets you set realistic calorie targets for weight loss, maintenance, or gain. How to read it – The result is shown in kilocalories per day (kcal/day). Use that number as the baseline, then adjust for activity level, diet goals, or medical advice. No signup, no ads, just an instant, free number you can trust for planning meals and workouts.
Pro tips
- Round the result to the nearest whole number for meal planning.
- If you’re very active, add an activity factor to the BMR.
- Use metric units as entered; conversion errors cause inaccurate results.
- Check that age and weight are realistic; extreme values skew the calculation.
Real-life examples
- Planning a weight‑loss diet and need a calorie baseline.
- A fitness coach setting macro targets for a client.
- A medical professional assessing metabolic health for a patient.
Case study
Sarah, 32, entered her stats and saw a BMR of 1,420 kcal/day. She used that number to set a 500‑calorie deficit, lost 8 lb in six weeks, and felt more energetic.