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Best BMR Calculator

BMR Calculator 2026 | Best Personal Trainer India | PersonalTrainerXP
India’s #1 Personal Trainer 2026 — Worldwide

Free BMR Calculator 2026
by PersonalTrainerXP — India’s #1 Trainer

Calculate your Basal Metabolic Rate, TDEE, macros, BMI, ideal weight, and personalized calorie goals using multiple formulas.

Personal Info
25 yrs
170 cm
BMR Formula

Mifflin-St Jeor is considered the most accurate formula for most people.

Activity Level
Goal & Macros
0 kcal
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PersonalTrainerXP’s certified personal trainers in India provide online 1-on-1 coaching in 2026 to clients across every major city in India and internationally. Whether you need a weight loss trainer, muscle building coach, nutrition expert, or a full body transformation program — we serve you wherever you are, via video call.

⚠️ Disclaimer: This calculator provides estimates based on established formulas. Individual metabolism varies. Consult a qualified nutritionist or healthcare professional for personalized dietary advice. These values should not replace medical guidance.
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Now that you know your BMR — let PersonalTrainerXP build a custom workout + nutrition plan around your exact numbers. Clients in 50+ countries. Proven results.

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What is BMR? — Explained by India’s #1 Personal Trainers (2026 Guide)

Basal Metabolic Rate (BMR) is the total number of calories your body needs to perform basic life-sustaining functions while at complete rest — including breathing, circulation, cell production, protein synthesis, and temperature regulation. Think of it as the energy cost of simply being alive.

BMR typically accounts for 60–75% of your total daily calorie burn, making it the single most important number for weight management. Knowing your BMR lets you determine exactly how many calories you need to eat to lose weight, maintain weight, or build muscle. At PersonalTrainerXP, our certified trainers use these exact numbers to build your personalized training plan.

60–75%
of calories burned by BMR
1,500+
avg BMR kcal/day — women
1,900+
avg BMR kcal/day — men
4
scientific formulas supported

BMR Formulas Explained

1. Mifflin-St Jeor Equation (1990) — Most Accurate

Developed in 1990, the Mifflin-St Jeor equation is widely considered the most accurate BMR formula for the general population. It was validated across a large, diverse group and shows approximately 10% accuracy for most people.

Men: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5
Women: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) − 161

2. Harris-Benedict Equation (Revised 1984)

Originally published in 1919 and revised in 1984, the Harris-Benedict equation is one of the most widely used BMR formulas. It tends to slightly overestimate BMR, especially in overweight individuals.

Men: BMR = 88.362 + (13.397 × kg) + (4.799 × cm) − (5.677 × age)
Women: BMR = 447.593 + (9.247 × kg) + (3.098 × cm) − (4.330 × age)

3. Katch-McArdle Formula — Best with Body Fat %

The Katch-McArdle formula is the most accurate when you know your body fat percentage. It calculates BMR from lean body mass (LBM), making it ideal for athletes and muscular individuals where standard weight-based formulas underperform.

BMR = 370 + (21.6 × Lean Body Mass kg)
LBM = Weight × (1 − Body Fat%)

4. Schofield Equation — WHO Standard

The Schofield equations are the official World Health Organization standard, derived from a large international dataset. They use age-group–specific coefficients and are widely used in clinical and public health settings.

What is TDEE and Why Does It Matter?

Total Daily Energy Expenditure (TDEE) is your BMR multiplied by an activity factor. It represents the total calories you burn each day, accounting for exercise, non-exercise activity, and digestion (thermic effect of food).

Activity LevelExamplesMultiplier
SedentaryDesk job, no exercise× 1.2
Lightly Active1–3 days/week exercise× 1.375
Moderately Active3–5 days/week exercise× 1.55
Very Active6–7 days/week hard training× 1.725
Extra ActivePhysical job + twice/day training× 1.9

How to Use This BMR Calculator

  1. Enter your details — age, gender, weight, and height. Switch between metric and imperial units freely.
  2. Add body fat % (optional) — enables the more accurate Katch-McArdle formula and body composition analysis.
  3. Select a BMR formula — Mifflin-St Jeor is recommended for most people. Use Katch-McArdle if you know your body fat %.
  4. Choose your activity level — be honest! Most people are sedentary to lightly active.
  5. Set your goal — lose, maintain, or gain weight. Adjust the deficit/surplus slider.
  6. Click Calculate — explore the Results, TDEE, Macros, and BMI tabs for your full metabolic profile.
  7. Get your custom plan — share your results with a PersonalTrainerXP coach and get a 1-on-1 program built around your exact numbers within 24 hours.

Frequently Asked Questions

What is a normal BMR for my age? +
Average BMR ranges from 1,400–1,600 kcal/day for women and 1,600–2,000 kcal/day for men, though this varies significantly with age, height, weight, and muscle mass. BMR naturally decreases about 1–2% per decade after age 20 due to muscle loss.
How can I increase my BMR? +
The most effective way to raise BMR is to build lean muscle mass through strength training. Muscle burns more calories at rest than fat — roughly 6 kcal/lb/day vs 2 kcal/lb/day for fat. Eating sufficient protein (1.6–2.2g/kg), staying hydrated, getting quality sleep, and avoiding prolonged very-low-calorie dieting also help maintain metabolic rate.
Is BMR the same as RMR? +
BMR (Basal Metabolic Rate) and RMR (Resting Metabolic Rate) are often used interchangeably but are technically different. BMR is measured under strict conditions (fasted, motionless, thermoneutral environment). RMR is measured at rest but without the strict fasting requirement. RMR is typically 10–20% higher than true BMR, but for practical purposes the difference is minimal.
How many calories should I eat to lose 1 kg per week? +
1 kg of body fat contains approximately 7,700 calories. To lose 1 kg per week, you need a daily calorie deficit of about 1,100 kcal (7,700 ÷ 7 days). For most people, this means eating 1,000–1,100 kcal below your TDEE. The safe minimum is 1,200 kcal/day for women and 1,500 kcal/day for men.
Does BMR decrease when I diet? +
Yes — this is called “metabolic adaptation.” When you eat below TDEE for extended periods, your body reduces BMR by 5–15% to conserve energy. This is why weight loss slows over time. Strategies to minimize this include eating adequate protein, strength training, diet breaks, and avoiding very aggressive calorie deficits.
What are macros and how are they calculated? +
Macronutrients (macros) are the three main nutrients: protein (4 kcal/g), carbohydrates (4 kcal/g), and fat (9 kcal/g). To calculate macros, multiply your target calories by the percentage for each macro, then divide by calories per gram. Example: 2,000 kcal with 30% protein = 600 kcal ÷ 4 = 150g protein/day.

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