BMI Calculator

Health & Body

Body mass index with healthy range by standard

Quick Answer

BMI Calculator: Body mass index with healthy range by standard. BMI = weight(kg) ÷ height(m)².

Height (cm)

Weight (kg)

BMI

22.5

NormalChina std

China BMI bands (18.5/24/28)

Under

Normal

Overweight

Obese

Healthy weight range for your height: 53.5–69.4 kg

Healthy range53.5~69.4 kg

To normal edge0 kg

Ponderal Index13.2

BMI Prime0.94

Reverse: target BMI → target weight

Target BMI

Target weight

63.6 kg

lose 1.4 kg

Steps

1BMI = weight ÷ height² = 65.0 ÷ 1.700² = 65.0 ÷ 2.8900 = 22.49
2China bands: under <18.5, normal 18.5–23.9, overweight 24–27.9, obese ≥28 → you are "Normal"

BMI bands: China vs WHO

Band	China (WS/T 428)	WHO	Risk
Underweight	<18.5	<18.5	Low (but nutritional risk)
Normal	18.5–23.9	18.5–24.9	Lowest
Overweight	24.0–27.9	25.0–29.9	Elevated
Obese	≥28.0	≥30.0	High (diabetes/CVD)

💡 BMI applies to adults 18+. It misclassifies muscular athletes (high muscle = high "overweight") and the elderly (muscle loss hides fat). China uses stricter cutoffs (24/28 vs 25/30) because Asians develop metabolic risk at lower BMI. Ponderal Index (kg/m³) is fairer for very tall/short people. Not for children — use growth percentile charts instead.

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How to Use

Enter body metrics: fill height, weight, age etc. as prompted by the BMI Calculator.
Read value and grade: results appear instantly with an authority-based classification.
Check reference tables: confirm your range and healthy targets against the tables on this page.
Back-solve your goal: adjust inputs to see what it takes to reach a target.

Key Points

BMI Calculator is a free online health tool — open and use, no sign-up.
All calculations run locally in your browser; your data never leaves the device.
Key capability: Body mass index with healthy range by standard.
Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

BMI formula

BMI = weight(kg) ÷ height(m)²

Example: 70kg, 1.75m → BMI = 70 ÷ 1.75² = 22.86

Healthy range (WHO): 18.5–24.9; China standard: 18.5–23.9

FAQ

How do I use the BMI Calculator?

Open the page and fill in the input fields — results update automatically. Body mass index with healthy range by standard.

Are the results accurate?

Results follow published international standards (WHO, ACE, IOM) and are for reference only.

Can this replace medical advice?

No. Always consult a qualified healthcare professional for health decisions.

Is it free? Do I need to sign up?

Completely free. No registration, login or download required.

Does it work on mobile?

Yes. The responsive design works on all devices.

Related Guides

Source & Updates

Based on WHO, ACE, IOM and other published international standards. Last updated: 2025-07

Authoritative sources:

Last updated: 2026-08-04

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. BMI Calculator[EB/OL]. https://www.yijiansuan.com/en/c/health/bmi

Results provided by this tool are for reference only and do not constitute professional advice.