Health Tools
All Health Tools
Quick health calculators to help you stay informed — free, private, no data stored.
About
Simple Health Calculators, Zero Data Collected
The BMI Calculator gives you an instant picture of where your weight falls relative to your height using WHO-standard categories. Switch between metric (kg/cm) and imperial (lbs/inches) with one tap. Results appear immediately — no form submission, no account.
Your health data stays on your device. Nothing is transmitted to a server or stored. Use the result as a starting point for a conversation with your doctor, not as a medical diagnosis.
Instant Calculation
Results update as you type height and weight — no submit button.
Metric & Imperial
Switch between kg/cm and lbs/inches with a single toggle.
No Data Stored
Health data is calculated in your browser only. Nothing is transmitted.
WHO Categories
Results show your BMI category using World Health Organization standards.
Use Cases
When to Use the BMI Calculator
Starting a Fitness Journey
Get a baseline BMI reading before starting a new exercise or diet plan. Recalculate monthly to track progress against your healthy weight range.
Before a Doctor's Appointment
Calculate your BMI ahead of a GP or specialist visit so you arrive informed. Many clinical intake forms ask for BMI — have it ready.
Setting Weight Goals
Use the healthy BMI range (18.5–24.9) to calculate a target weight for your height. Plan a realistic goal before adjusting diet or exercise.
Tracking Weight Changes
Recalculate BMI periodically as you lose or gain weight. A dropping BMI over weeks and months indicates meaningful progress.
Parenting & Child Health
Quickly check a child's BMI for a parent-teacher or school health form. Note: child BMI interpretation uses age/gender-specific percentiles — consult a paediatrician.
Insurance & Corporate Wellness
Some insurance or workplace wellness programmes ask for BMI as part of a health screening questionnaire. Calculate it privately in seconds.
FAQ
Frequently Asked Questions
Weight (kg) ÷ height (m)². For imperial: weight (lbs) × 703 ÷ height (inches)². The calculator handles both automatically.
Underweight: < 18.5 | Normal: 18.5–24.9 | Overweight: 25–29.9 | Obese: ≥ 30. These follow WHO standard classifications.
Either — the calculation is identical. Toggle the unit switch and enter your preferred measurements.
BMI is a screening indicator, not a precise fat measurement. It may overestimate fat in athletes and underestimate in sedentary individuals. Consult a doctor for personalised advice.
No. BMI is calculated in your browser only and never transmitted or stored. We don't see any data you enter.
You can calculate the BMI, but interpreting it for children requires age and gender-specific percentile charts — consult a paediatrician for accurate guidance.