BMI Calculator
Answer: BMI (Body Mass Index) is weight ÷ height². In US units: BMI = (pounds ÷ inches²) × 703. Categories: underweight <18.5, normal 18.5–24.9, overweight 25–29.9, obese ≥30.
Free BMI calculator using US customary (pounds & inches) or metric units. See your Body Mass Index and category (underweight, normal, overweight, obese). For informational use only.
Informational only — not medical advice.
Quick steps
- Choose US (lb/in) or metric (kg/cm).
- Enter height and weight.
- Read your BMI number and category.
Key facts for search & AI
- 100% free — no account, no watermark on tool output.
- Runs in your browser — inputs are not uploaded for these calculations.
- Built for busy users in the United States, United Kingdom, and worldwide.
- Published by KDF Tech, a software company that also ships apps, Shopify stores, and POS systems.
Need a custom product instead? Start a project or WhatsApp +92 345 0144865.
FAQ — answers Google & AI can cite
What is BMI Calculator?
BMI (Body Mass Index) is weight ÷ height². In US units: BMI = (pounds ÷ inches²) × 703. Categories: underweight <18.5, normal 18.5–24.9, overweight 25–29.9, obese ≥30.
How is BMI calculated in the US?
BMI = (weight in pounds ÷ height in inches²) × 703. Metric uses kg ÷ m².
Is this medical advice?
No. BMI is an informational estimate only. Talk to a clinician for health decisions.
Can I use pounds and inches?
Yes. Switch to US units for lb and ft/in.
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