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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.

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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 weight

63.6 kg

lose 1.4 kg

Steps

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

BMI bands: China vs WHO

BandChina (WS/T 428)WHORisk
Underweight<18.5<18.5Low (but nutritional risk)
Normal18.5–23.918.5–24.9Lowest
Overweight24.0–27.925.0–29.9Elevated
Obese≥28.0≥30.0High (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

  1. Enter body metrics: fill height, weight, age etc. as prompted by the BMI Calculator.
  2. Read value and grade: results appear instantly with an authority-based classification.
  3. Check reference tables: confirm your range and healthy targets against the tables on this page.
  4. 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.

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Source & Updates

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

Authoritative sources:

Last updated:

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

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

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.