Free Health Calculators
BMI, calorie, fitness, and wellness calculators. All calculators are free, instant, and require no signup.
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BMI Calculator
Calculate your Body Mass Index using both the standard WHO scale (25 / 30 cutoffs) and the WHO Asia-Pacific revised scale (23 / 25 cutoffs) used by ICMR for South-Asian body composition. Supports metric and imperial units.
Pregnancy / Due Date Calculator
Calculate pregnancy due date using Naegele's rule (LMP + 280 days), conception date, or ultrasound dating. Shows current week, trimester boundaries, and all key milestone dates — first heartbeat, anatomy scan, viability, full-term.
Ovulation Calculator
Find your most likely ovulation date and 6-day fertile window based on LMP and cycle length. Shows next 3 cycles with conception-best days highlighted. Pairs with Period and Pregnancy Due Date calculators.
Period Calculator
Predict your next 6 menstrual periods with start dates, fertile windows, ovulation dates, and PMS windows side-by-side. Customisable cycle length and period duration; tracks cycle regularity.
TDEE Calculator
Calculate Total Daily Energy Expenditure (TDEE) using Mifflin-St Jeor BMR × activity factor. Returns calorie targets for cutting / maintenance / bulking + macro split for vegetarian and non-vegetarian Indian diets.
Calorie / TDEE Calculator
Calculate daily calorie needs (TDEE) based on age, weight, height, and activity level.
Body Fat % Calculator
Estimate body fat percentage from tape measurements using the circumference (US Navy) method, in metric (cm/kg) or imperial. Includes goal-weight projection.
BMR Calculator
Calculate Basal Metabolic Rate — the calories your body burns at complete rest.
Macros Calculator
Calculate ideal daily protein, carbohydrates, and fat intake for your goals.
Ideal Weight Calculator
Calculate your ideal body weight based on height using multiple formulas.
BMI for Kids Calculator
Calculate BMI for children and teens ages 2-19 using IAP (Indian Academy of Pediatrics) 2015 growth charts, with CDC charts as an option.
Calories Burned Calculator
Calculate calories burned during exercise based on activity type, weight, and duration.
Heart Rate Calculator
Calculate your target heart rate zones for maximum fat burn and cardio fitness.
Protein Calculator
Calculate daily protein intake based on weight, activity level, and fitness goals.
BAC Calculator
Estimate Blood Alcohol Content (BAC) based on drinks consumed, weight, and time.
Running Pace Calculator
Calculate running pace, finish time, and distance for any running event.
Sleep Calculator
Calculate the best times to wake up or go to sleep based on sleep cycles.
Water Intake Calculator
Calculate how much water you should drink daily based on weight, activity level, and climate.
Lean Body Mass Calculator
Calculate lean body mass and fat mass using the Boer, James, and Hume formulas.
One Rep Max Calculator
Calculate your one rep max for any lift using Epley, Brzycki, Lander, and other formulas.
Waist-Hip Ratio Calculator
Calculate your waist-to-hip ratio and assess cardiovascular risk according to WHO guidelines.
Sobriety Date Calculator
Calculate how long you have been sober in years, months, days, and hours from your sobriety date.
Pregnancy Weight Gain Calculator
Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI and guidelines.
Due Date Calculator
Calculate your baby's estimated due date, trimester milestones, and key pregnancy dates.
Conception Date Calculator
Estimate conception date from due date, or calculate due date from conception date.
Carb Intake Calculator
Calculate your daily carbohydrate needs based on calorie goals, activity level, and diet type.
Fat Intake Calculator
Calculate daily fat intake recommendations based on calorie goals and health objectives.
Body Surface Area Calculator
Calculate body surface area (BSA) using DuBois, Mosteller, and Haycock formulas.
Body Type Calculator
Determine your body type (ectomorph, mesomorph, endomorph) based on measurements.
GFR / eGFR Calculator
Estimate Glomerular Filtration Rate (eGFR) to assess kidney function using CKD-EPI formula.
Height Predictor Calculator
Predict a child's adult height using the mid-parental height formula based on parents' heights.
Keto Macros Calculator
Calculate your personalized keto diet macros — net carbs, protein, and fat — based on your TDEE, weight goal, and ketogenic ratio.
Weight Loss Calculator
Calculate exactly how long it will take to reach your goal weight at a given calorie deficit, with realistic timeline and daily calorie target.
Intermittent Fasting Calculator
Find the right intermittent fasting schedule for your goals (16:8, 18:6, 20:4, OMAD, 5:2) and calculate fasting/eating windows with calorie targets.
A1C / eAG Calculator
Convert HbA1c percentage to estimated Average Glucose (eAG) and check your diabetes risk category — normal, prediabetes, or diabetes range.
Marathon Pace Calculator
Calculate your goal marathon pace per mile/km, mile-by-mile splits, and predict 5K/10K/half marathon times from any pace or finish target.
Heart Rate Zones Calculator
Calculate your 5 heart rate training zones (recovery, fat burn, aerobic, anaerobic, max) using max-HR and Karvonen formulas based on age, resting HR, and fitness level.
About our health calculators
Health numbers only mean something when they fit the person reading them. Our health calculators are tuned for Indian users — for example, the BMI calculator flags the Asian-Indian risk thresholds (overweight at a BMI of 23 rather than 25), because research shows South Asians carry higher metabolic risk at lower body weights than Western populations. The aim is honest, context-aware guidance rather than one-size-fits-all numbers.
From everyday wellness to fitness planning, this category covers the essentials: BMI and ideal body weight, daily calorie needs (BMR and TDEE), body fat percentage, protein and water intake, pregnancy due dates, and pace and calorie tools for runners and gym-goers. Each calculator explains what the result means, what range is considered healthy, and what you can do about it — so a number becomes something you can act on, not just a figure on a screen.
All health calculators are free, mobile-friendly, and private — your height, weight, age, and other inputs never leave your device. They are educational tools meant to help you understand your body and track progress over time, not to diagnose or treat any condition. For anything that concerns you, or before making big changes to diet, exercise, or medication, please consult a qualified doctor or registered dietitian.