Calculation results
BMR:
BMR (scientific):
BMR Calculator
What Your BMR Actually Represents
Basal metabolic rate, or BMR, is the minimum energy your body needs at complete rest to run your heart, lungs, brain, and cell repair. Organs do most of that work, with the liver and brain burning the largest share. It typically covers 60 to 70 percent of daily calorie burn. Knowing the figure keeps any diet plan honest.
Cutting calories, gaining muscle, or planning recovery nutrition all start from this number. It is also the value that RMR calculators approximate. Every plan that follows leans on it, from cutting phases to refeeds.
The Formula Behind the Number
The calculator runs the Mifflin-St Jeor equation: for men, 10 x weight in kg plus 6.25 x height in cm minus 5 x age plus 5, and for women the same expression minus 161. Each year of age quietly subtracts 5 calories. Height and weight drive most of the spread between people.
Example: a 30 year old man at 70 kg and 175 cm computes 700 plus 1093.75 minus 150 plus 5, arriving near 1648 calories per day. A woman with matching stats lands around 1488. Muscular bodies read higher and higher fat percentages read lower at the same weight.
How to Use the Calculator Safely
Switch between Imperial and Metric, then complete the Age, Gender, Height, and Weight boxes and press Calculate. Imperial mode expects feet, inches, and pounds; Metric wants centimeters and kilograms. The output is a resting figure only, so add activity and digestion on top before planning meals.
Never build a diet below 1200 calories for women or 1500 for men without medical supervision, since intakes that low shortchange protein and micronutrients. Muscle, not willpower, holds BMR up, so pair any deficit with resistance training.
Frequently Asked Questions
Is BMR the same as RMR?
BMR is captured under stricter laboratory conditions and runs slightly lower. RMR typically reads 50 to 100 calories higher because it quietly permits light resting activity.
How many calories should I eat above BMR?
Total intake usually lands between 1.2 and 1.9 times BMR once activity is included. A BMR of 1648 therefore implies roughly 1980 to 3130 daily calories.
Why is my BMR lower than my friend’s?
BMR follows lean mass, height, and age, and it runs 5 to 10 percent higher in men. A shorter, older, or less muscular body can burn 200 to 400 fewer calories at rest.
Can I raise my basal metabolic rate?
Building muscle is the proven route, since each kilogram of lean tissue adds roughly 13 calories of daily burn. Crash dieting does the opposite by shrinking muscle.
Is eating below my BMR dangerous?
It can be. Dropping below about 1200 calories for women or 1500 for men risks nutrient gaps, muscle loss, and a slower metabolism that rebounds hard.