Health & Fitness Calculators

What This Cluster Covers

This page groups six calculators that all relate to one broad topic — body weight, metabolism and pregnancy dating — even though a few of them live in a separate /health-calculator/ section of the site for historical reasons. Five of the six (BMI, BMR, Calorie, Body Fat Percentage and Ideal Height & Weight) are about the same underlying thing: your body composition and energy needs. They're often used together — a BMI reading naturally leads people to check their BMR or calorie needs, and a Body Fat Percentage or Ideal Weight result adds detail that BMI alone can't capture. The sixth tool, the Pregnancy Due Date Calculator, is a distinct women's-health calculator that sits in the same Health & Fitness cluster rather than the body-composition group.

The BMI Calculator here is built specifically for Indian users: it applies the Asian BMI cutoffs (Normal 18.5–22.9, Overweight 23–24.9, Obese 25 and above) rather than the WHO's general-population cutoffs (Normal up to 24.9), reflecting research that Indians and other South Asians tend to develop diabetes and heart disease at lower BMI levels. The other calculators in this cluster — BMR and Calorie (Mifflin-St Jeor formula), Body Fat Percentage (US Navy tape-measure method), Ideal Height & Weight (Devine and Robinson formulas) and Pregnancy Due Date (last menstrual period dating) — use formulas that are recognised and used internationally, so they work equally well for users outside India.

Every calculator on this page runs entirely in your browser. Nothing you enter — your height, weight, measurements or dates — is uploaded to a server or stored anywhere. These are screening and estimation tools meant for general awareness, not medical advice or diagnosis; for personal health decisions, please consult a doctor, registered dietitian or gynaecologist as appropriate.

Which Calculator Do I Need?

If you're not sure where to start, think of the five body-composition tools as a natural sequence. Start with BMI for a quick screening number from just your height and weight — it takes seconds and gives you a category (Underweight, Normal, Overweight or Obese) using Asian cutoffs. Want to know your baseline calorie burn at rest? Use BMR. Planning a specific weight goal, whether that's losing, maintaining or gaining? The Calorie Calculator turns your BMR into a daily target, with a macro breakdown. If you want a more detailed body-composition estimate than BMI alone can give — useful if you're muscular or athletic, since BMI can't tell muscle from fat — use Body Fat Percentage, which only needs a tape measure. And if you're curious what weight range your height is generally considered healthy for, independent of a single BMI number, use Ideal Height & Weight, which compares two established formulas side by side. Separately, if you're expecting a baby, the Pregnancy Due Date Calculator estimates your due date, current week and trimester from your last period.

Frequently Asked Questions