Calorie and BMR Calculator
Find how many calories your body burns at rest and in a day, and how many to eat to maintain, lose, or gain weight safely. Reviewed by Dr. Ravi Sishir Reddy.
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Calculate your calories
Nothing you enter is stored or sent anywhere. The calculation happens on your device.
What is BMR, and how are daily calories worked out?
Your basal metabolic rate, or BMR, is the energy your body uses at complete rest to run your heart, brain, breathing, and other basic functions. It is the largest part of what you burn each day. Your total daily need adds the energy you spend moving, which is why an active person needs more than someone who sits most of the day. This calculator estimates BMR with the Mifflin-St Jeor equation, then multiplies it by an activity factor to give your maintenance calories, the amount that keeps your weight steady. Eat below that to lose, above it to gain.
| Activity level | Multiplier | Who it fits |
|---|---|---|
| Sedentary | 1.2 | Desk work, little exercise |
| Lightly active | 1.375 | Light exercise 1 to 3 days a week |
| Moderately active | 1.55 | Exercise 3 to 5 days a week |
| Very active | 1.725 | Hard exercise 6 to 7 days a week |
| Extremely active | 1.9 | Physical job or twice-daily training |
Calories are only half the story, especially in India
How much you eat sets your weight, but what you eat sets your health, and this matters in Indian diets. Many Indian meals are heavy in refined carbohydrate, rice, wheat, and sugar, and light in protein, which drives blood sugar and abdominal fat even at a reasonable calorie count. Aim for enough protein, roughly 0.8 to 1 gram per kilogram of body weight for most adults, from dal, beans, eggs, dairy, paneer, or lean meat, and fill half the plate with vegetables. Protein protects muscle when you are losing weight and keeps you full. For people with or at risk of diabetes, the balance of carbohydrate matters as much as the calorie total, covered in our guide on type 2 diabetes.
"A calorie number is a useful starting point, but I tell patients not to chase it too hard. Cutting to very low calories backfires, you lose muscle, slow your metabolism, and give up. What works is a modest deficit, enough protein, and cutting the sugar and refined carbohydrate that dominate our diets. For someone with diabetes or a fatty liver, that shift matters more than the exact calorie figure. Steady beats drastic every time."
Dr. Ravi Sishir Reddy, Consultant Physician, Vivekananda Hospital, Begumpet
How to use your number well
- Treat it as a starting estimate. Formulas are averages; adjust after two to three weeks based on real weight change.
- Do not go below the safe floor. Very low calorie diets need medical supervision, not a calculator.
- Weigh your progress weekly, at the same time of day, and judge the trend over weeks, not daily swings.
- Pair calories with your other numbers, your BMI and waist ratio, which tell you whether you are losing fat or muscle.
Note: This calculator gives a general estimate for healthy adults. It is not suitable during pregnancy or breastfeeding, for children and teenagers, for athletes with high muscle mass, or for anyone with an eating disorder or a medical condition affecting weight. If you have diabetes, thyroid disease, or take medicines that affect weight, get personal advice from a doctor or dietitian rather than following a calculator.
Frequently Asked Questions
What is BMR and how is it calculated?
BMR, or basal metabolic rate, is the number of calories your body burns at complete rest just to stay alive. This calculator uses the Mifflin-St Jeor equation, which takes your weight, height, age, and sex. Your total daily need is the BMR multiplied by an activity factor, so a more active person needs more calories than someone who is mostly sedentary.
How many calories should I eat to lose weight?
To lose weight at a safe pace, eat about 500 calories a day below your maintenance level, which gives roughly half a kilogram of loss a week. This calculator shows that target for you. It will not suggest going below a safe floor, because very low calorie intakes lose muscle, slow your metabolism, and rarely last. Steady, moderate reduction works best.
Which is the most accurate calorie formula?
The Mifflin-St Jeor equation is considered the most accurate everyday formula for estimating calorie needs in most adults, and it is the one this calculator uses. All such formulas give an estimate, not an exact figure, because real metabolism varies between people. The best approach is to use the number as a starting point, then adjust based on your actual weight change over two to three weeks.
Why does my calorie need fall as I get older?
Calorie needs tend to fall with age mainly because muscle mass decreases, and muscle burns more energy than fat. Lower activity with age adds to it. This is why the same eating pattern can lead to gradual weight gain over the years. Keeping muscle through strength activity and enough protein helps hold your metabolism up as you age.
How much protein should I eat, especially on an Indian diet?
Most adults need roughly 0.8 to 1 gram of protein per kilogram of body weight a day, and many Indian diets fall short because they are heavy in rice and wheat and light in protein. Good sources include dal, beans, eggs, dairy, paneer, soya, and lean meat. Enough protein protects muscle when you are losing weight and keeps you full, which makes a calorie target easier to stick to.
Is it safe to eat very few calories to lose weight fast?
No. Very low calorie diets lose muscle along with fat, slow your metabolism, cause fatigue and nutrient gaps, and are hard to sustain, so the weight usually returns. As a general guide, adults should not eat below about 1200 calories for women or 1500 for men without medical supervision. A modest, steady deficit with enough protein is safer and works far better over time.
Do these calorie numbers apply during pregnancy?
No. This calculator is for healthy non-pregnant adults. Calorie and nutrient needs in pregnancy and breastfeeding are different and should be guided by your obstetrician, not a general calculator. The same applies to children, athletes with high muscle mass, and anyone with a medical condition affecting weight, who all need individual advice.
Where can I get a personal diet and weight plan in Hyderabad?
Vivekananda Hospital, Begumpet offers physician and dietitian guidance that turns a calorie number into a realistic plan for your body, diet, and any conditions like diabetes or thyroid. Book on WhatsApp at +91 7207904418. A metabolic assessment and diet consultation are part of our health checkup and diabetes care.
A Calorie Number Is a Start. A Real Plan Is What Works.
Let our physician and dietitian turn your numbers into a plan that fits your body, your diet, and any conditions you have. Practical, sustainable, and built for Indian food.
Address: Vivekananda Hospital, 6-3-871/A, Greenlands Road, Beside CM Camp Office, Begumpet, Hyderabad 500016
Also serving: Ameerpet, Prakash Nagar, Somajiguda, Punjagutta, Secunderabad, SR Nagar, Banjara Hills
About the Medical Reviewer
Dr. Ravi Sishir Reddy (MBBS, MD General Medicine) is a full-time Consultant Physician at Vivekananda Hospital, Begumpet, Hyderabad, with over 15 years of clinical experience in internal medicine, critical care, and the management of obesity, diabetes, and metabolic health. NMC registration verifiable on the Indian Medical Register.
Medical disclaimer: This calculator and article are for general health information and education only. Calorie estimates are a screening aid, not a diagnosis or a prescription, and are not a substitute for personal advice from a doctor or dietitian. Do not use very low calorie targets without medical supervision. In an emergency, call +91 7207904418 or visit the nearest emergency department.
References: Mifflin-St Jeor equation, original study | WHO, Healthy diet | ICMR-NIN Dietary Guidelines for Indians