BMI adjusted for South Asian bodies. Calorie targets based on your actual stats, not one-size-fits-all averages. Pregnancy milestones with Indian antenatal schedule. Body fat without gym equipment.
Four essential health calculators built on the medical formulas actually used by clinicians and fitness professionals in India.
Standard BMI charts classify overweight as 25+ and obese as 30+. Those numbers came largely from European population studies. For South Asians, the WHO Asia-Pacific guidelines recommend different thresholds: overweight at 23+ and obese at 27.5+.
The reason is metabolic, not just cultural. Indians tend to store more visceral fat - the dangerous kind that wraps around organs - at lower total body weight. Someone with a BMI of 24 who looks fine on a Western chart may have elevated cardiovascular and metabolic risk by South Asian standards.
Our BMI calculator shows your classification under both scales. Seeing both numbers is more useful than seeing one. A BMI of 23.5 might read "healthy" globally but "overweight" by Asia-Pacific criteria - and that distinction is clinically relevant for Indians.
Start with BMI for a broad picture. If it's above 23 (Asia-Pacific), that's worth taking seriously even if it's below 25 on global charts. Below 18.5, underweight is a concern regardless of which scale you use.
Then check body fat. BMI treats all weight the same - it can't tell muscle from fat. A fit person and a sedentary person can have identical BMIs. The body fat calculator gives you a more honest breakdown: what percentage of your body is actually fat tissue, and what's lean mass.
Then set a calorie target. Once you know where you're starting from, the calorie calculator tells you exactly how much to eat. It gives you the number for weight loss at a specific pace - say 0.5 kg per week - plus the protein, carbohydrate, and fat breakdown if you're tracking macros.
For pregnancy, the due date calculator works from LMP (last menstrual period), exact conception date, or IVF transfer date. Beyond just the estimated due date, it shows the current gestational week, trimester boundaries, and a week-by-week calendar that includes key Indian antenatal tests like the nuchal translucency scan (11–13 weeks), anomaly scan (18–20 weeks), and glucose challenge test (24–28 weeks).
One important note: these are estimation tools. Population averages don't apply equally to every individual. Use the numbers as baselines and starting points - not as replacements for a conversation with your doctor or nutritionist.
The Asia-Pacific WHO guidelines define healthy as 18.5–22.9 for South Asians. Overweight starts at 23, and obese at 27.5 - lower than global standards of 25 and 30 respectively. Indians carry more visceral fat at lower body weights, which explains the different thresholds. A BMI of 23–24 that looks fine on Western charts may warrant attention in an Indian clinical context.
The Mifflin-St Jeor equation has a margin of error of roughly +/- 10% for most people - better than the older Harris-Benedict formula still used on many sites. The bigger variable is the activity multiplier. The safest approach: use the calculator's number as a starting point, track your actual weight for 2–3 weeks, and adjust by 100–200 kcal if your rate of change doesn't match your goal.
The US Navy method needs only a soft measuring tape. Men: measure neck and waist circumference. Women: measure neck, waist (narrowest point), and hips (widest point). The formula is validated by the US Department of Defense and is accurate enough to track progress over time, even if a DEXA scan would be more precise.
Naegele's rule - adding 280 days to the first day of your last period - is the standard method used by obstetricians globally. About 5% of babies arrive exactly on the EDD. The real purpose is to anchor gestational milestones and schedule antenatal tests at the right weeks. An early ultrasound (before 13 weeks) is the most accurate way to confirm gestational age, and your doctor may adjust the EDD based on fetal measurements.
Free health calculators built on medically referenced formulas - no paywalls, no sign-ups, no ads cluttering your results.