Health Calculators
BMI, calories, fitness and wellness · 18 free tools
Free Health Calculators for India
12+ free health and fitness calculators: BMI, BMR, daily calorie needs, body fat percentage, ideal body weight, water intake, pregnancy due date, ovulation, heart rate zones and macronutrient split. No signup, no app download, runs directly in your browser. Use these to set realistic fitness targets, plan meals around your TDEE in kilocalories and track healthy ranges suited for Indian body types.
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BMI Calculator
Calculate your Body Mass Index in seconds — with WHO categories and Asian-specific cutoffs.
Calorie Calculator
Daily calorie needs to maintain, lose, or gain weight — based on your BMR and activity level.
Water Intake
Daily water needs based on weight & activity.
Age Calculator
Calculate your exact age in years, total months, and total days from any date of birth — accurate down to the day.
TDEE Calculator
Estimate your total daily energy expenditure (TDEE) from age, sex, height, weight, and activity level using the Mifflin-St Jeor equation.
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BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at complete rest.
Macro Calculator
Calculate protein, carbs, and fat ratios.
Body Fat %
Estimate body fat percentage.
Ideal Weight
Find your ideal weight based on height.
Pregnancy Due Date
Estimate your baby's due date.
Ovulation Calculator
Find your fertile window.
Heart Rate Zone
Training zones based on age.
VO2 Max
Estimate aerobic fitness capacity.
Running Pace
Calculate running pace per km/mile.
One-Rep Max
Calculate your 1RM for any lift.
Sleep Cycle
Best bedtime based on wake time.
Calories Burned Calculator
Estimate calories burned for 20 common activities from your weight and workout duration using research-based MET values.
Protein Intake Calculator
Find your daily protein target in grams from your body weight and training goal, with low/high ranges and a per-meal breakdown.
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How to Use These Health Calculators
Health numbers like BMI, BMR and daily calorie needs are a starting point for fitness planning, not a final verdict. These calculators give you quick estimates so you can set sensible weight, nutrition and activity goals before talking to a doctor or nutritionist.
Tips for Accurate Results
For BMI, enter weight in kilograms and height in centimetres. WHO classifies BMI under 18.5 as underweight, 18.5 to 24.9 as normal, 25 to 29.9 as overweight and 30 plus as obese. For Indian adults, many doctors use a tighter range (normal up to 22.9, overweight from 23) due to higher abdominal fat at lower BMI levels.
For BMR and TDEE, pick the activity level that matches your real week, not your goal week. Sedentary office work with no exercise is closer to 1.2x BMR than 1.5x. For calorie deficit, aim for a 300 to 500 kcal cut per day for steady fat loss rather than crash dieting.
Water intake calculators use body weight and climate. In Indian summer, add 500 to 750 ml extra. For pregnancy due date, enter the first day of your last menstrual period (LMP) and average cycle length.
Real-World Example
Amit from Hyderabad is 32, weighs 82 kg at 175 cm and wants to lose belly fat. His BMI is 26.8 (overweight by Asian standards). The BMR calculator gives him about 1,780 kcal, and his TDEE at light activity is around 2,450 kcal. He sets a daily target of 2,000 kcal, uses the macro calculator to split it into 140 g protein, 50 g fat and 220 g carbs, and aims for 3 litres of water daily. After three months he checks his BMI again to see steady progress.
Accuracy and Limitations
Results are estimates based on widely used formulas (Harris-Benedict, Mifflin-St Jeor, WHO BMI bands). They do not account for muscle mass, medical conditions, medications or pregnancy complications. Always consult a registered doctor, dietician or gynaecologist before starting a new diet, fitness or pregnancy plan. These tools are educational and do not replace personal medical advice.