The BMR (Basal Metabolic Rate) calculator estimates how many calories your body needs per day at complete rest. It uses the Mifflin-St Jeor equation, which takes into account sex, age, height, and weight.
BMR is a building block for many nutrition and training plans. When multiplied by an activity factor, it gives an estimate of total daily calorie needs, which you can then adjust for weight loss or gain goals.
Enter your information in the fields above, run the calculation, and review the result to understand what it means for your situation.
Look at the output in the context of your overall goals rather than in isolation. Consider how sensitive the result is to changes in your inputs (for example, adjusting the amount, rate, or time) to understand which factors matter most.
This tool is a simplified model and does not capture every nuance of real life. Treat it as a planning aid, not a guarantee. For important financial or health decisions, combine these results with professional advice and more detailed analysis.