The AadiFit BMR Calculator estimates basal metabolic rate—the calories your body burns at complete rest—and compares multiple validated equations side by side.
Calculate your basal metabolic rate accurately. Understand how many calories your body burns at rest, the foundation of any nutrition or fat loss plan.
Add age, sex, height, and weight.
See resting burn from multiple validated equations.
Pair with TDEE and Calorie Planner for targets.
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Estimate basal metabolic rate from multiple validated formulas.
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Enter the inputs relevant to BMR Calculator for Women and generate your result in seconds.
Calculate your basal metabolic rate accurately. Understand how many calories your body burns at rest, the foundation of any nutrition or fat loss plan.
Your output translates data into a decision you can apply this week.
Re-run when inputs change materially or progress stalls for two weeks.
Metabolic age compares your estimated resting output to population averages for your sex and chronological age. If your BMR sits well below typical values for someone your size, your “metabolic age” reads older, often reflecting lower lean mass, chronic stress, poor sleep, or a history of aggressive dieting. Coach Aditya's recommendation: use metabolic age as a directional flag, not a verdict. Pair this calculator with the Body Composition Analyzer so the number reflects muscle you carry, not just weight on the scale.
Coach Aditya's data: when clients rebuild training volume and protein before touching calories again, resting output trends back toward their methodology baseline faster than when they keep cutting on the same intake. The TDEE Calculator then gives you the full-day picture so maintenance targets match real movement, not spreadsheet optimism.
After months in a deficit, BMR and NEAT often undershoot prediction: less fidgeting, cooler extremities, flatter training performance, and slower scale response at the same calories. That is adaptation, not a broken metabolism. Recovery usually means structured time at or near true maintenance, adequate protein, and progressive strength work, not another aggressive reset. Coach Aditya's recommendation: run a two-to-four-week adherence check at calculated maintenance before you label the diet “failed.” Use the Calorie Planner to distribute protein and carbs around training so repair cost is covered.
Coach Aditya's data: clients who alternate hard blocks with short maintenance phases retain more lean mass and report fewer rebound episodes than those who yo-yo between extremes. If progress has stalled for eight weeks or more, the Plateau Breaker helps separate a true metabolic adaptation stall from under-training or hidden weekend calories.
Basal Metabolic Rate is the number of calories your body burns at complete rest, the energy required to keep your heart beating, lungs breathing, and organs functioning. It accounts for 60–75% of total daily energy expenditure for most people. TDEE adds exercise, digestion, and NEAT on top of BMR. Knowing your BMR tells you the absolute floor, the minimum your body needs regardless of activity. Eating below BMR consistently leads to muscle loss, hormonal disruption, and metabolic adaptation that can persist for months after the diet ends.
Women have a lower BMR than men of the same height and weight for two reasons: lower muscle mass on average, and hormonal differences that affect resting metabolic rate. The Mifflin-St Jeor formula, the most validated BMR equation for modern populations, adjusts for this with a sex-specific constant. Women also experience BMR fluctuations across the menstrual cycle: BMR rises by approximately 100–150 calories in the luteal phase due to progesterone. This is why hunger increases before a period, it is not psychological, it is metabolic. Coach Aditya's nutrition plans account for this cycle variation rather than applying a flat daily target.
BMR declines approximately 1–2% per decade after age 30, primarily because muscle mass decreases and fat mass increases as people age. This is not inevitable, it is a consequence of reduced activity and protein intake, not aging itself. Research consistently shows that resistance training preserves and rebuilds metabolically active muscle tissue at any age, preventing the BMR decline that inactive people experience. Coach Aditya's recommendation: prioritise protein at 1.8–2.2g per kilogram of body weight and resistance train at least 3 days per week. These two behaviours account for 80% of long-term metabolic health. Use the TDEE Calculator to see how your BMR translates to real daily calorie needs.
Mifflin-St Jeor is the most accurate for the general population, validated across multiple studies as the best predictor of measured resting metabolic rate. Harris-Benedict (1919) overestimates BMR by 5–15% in most people because it was calibrated on a small, non-representative sample. Katch-McArdle is the most accurate formula if you know your lean mass, because it removes body fat from the calculation entirely, fat tissue burns almost no calories at rest. For Indian populations eating predominantly plant-based diets with lower muscle mass norms, Mifflin-St Jeor with a slight downward adjustment produces the most reliable starting estimate. Use the Calorie Planner to build your full nutrition targets from your BMR.
Yes, by building muscle. Every kilogram of lean muscle tissue burns approximately 13 calories per day at rest, compared to roughly 4 calories per kilogram of fat. Adding 5kg of muscle over 12–18 months of consistent resistance training increases your resting BMR by 65 calories per day, 450 calories per week, without any change in diet or cardio. Over a year that compounds into meaningful metabolic flexibility. This is why Coach Aditya prioritises muscle preservation during a cut and muscle building phases between cuts. A higher BMR means a larger deficit at the same food intake, fat loss becomes progressively easier as the metabolic base grows. Use the Workout Generator to build the training stimulus that drives this adaptation.
Basal Metabolic Rate is the number of calories your body burns at complete rest to maintain basic functions including breathing, circulation, and cell repair. Total Daily Energy Expenditure adds the energy cost of all your daily activity on top of BMR. BMR is typically 60 to 75 percent of your total daily calorie burn.
Muscle tissue burns more calories at rest than fat tissue, so building lean mass raises BMR over time. The effect is modest — roughly 6 to 10 additional calories per day per kilogram of muscle gained — but it compounds over years of consistent training. Crash dieting lowers BMR through metabolic adaptation and muscle loss.
Women typically have a lower BMR than men of the same height and weight because they carry proportionally more fat mass and less lean mass. Fat tissue has a lower metabolic rate than muscle. Hormonal differences also play a role. The BMR formula accounts for biological sex to give a more accurate baseline estimate.
No. Eating below BMR deprives your body of the calories it needs for basic function and triggers significant muscle breakdown, hormonal disruption, and metabolic slowdown. Your calorie target for fat loss should be below your TDEE (total daily burn) but always above your BMR.
The Mifflin-St Jeor equation is the most validated for general populations and is used as the primary formula here. The Katch-McArdle formula is more accurate when body fat percentage is known because it calculates from lean mass directly. The calculator uses both and shows which applies to your inputs.