What is "BMI"?

BMI (Body Mass Index) is calculated by dividing weight (kg) by height (m) squared. It's an international standard for measuring obesity. For Asians, normal BMI is 18.5-22.9, overweight is 23+, and obese is 25+.

Example: Height 170cm, Weight 65kg → BMI = 65 ÷ (1.7)² = 22.5 (Normal)

BMI Calculator

Height (cm)170 cm

Weight (kg)70 kg

Your BMI

24.2

BMI Classification

BMI Range	Category
18.5 below	Underweight
18.5 - 22.9	Normal
23 - 24.9	Overweight
25 - 29.9	Obese
30 above	Severely Obese

* Asian standard (WHO Asia-Pacific criteria)

🏃

BMI Result

24.2

✨ Overweight

Height 170cm, Weight 70kg

🔎 Compare results

Compare outcomes by conditions

#BMICalculator #Health #Fitness #Weight #Wellness

What is BMI?

BMI (Body Mass Index) is a measure that uses your height and weight to assess your health status. It is calculated by dividing your weight in kilograms by your height in meters squared.

BMI Formula

BMI = weight(kg) ÷ height(m)²

BMI = weight(kg) ÷ height(m)². For example, a person weighing 70kg and 175cm tall has a BMI of 70 ÷ 1.75² = 22.9.

Healthy Weight Management Tips

✓BMI is just a reference indicator; it doesn't account for muscle mass or body fat percentage
✓Regular exercise and a balanced diet are important
✓Rapid weight changes can be harmful to your health
✓Consult a healthcare professional for accurate health assessment

Last updated: 2025-01

💡Check these out next

🍎

Calculate Calories

Check your daily recommended calories

→

📋

Set Health Goals

Set target dates with D-Day calculator

→

📈

Check Financial Health

Plan investments with compound interest

→

🎯 Who is this for?

Useful for various situations

🏃

Before Starting Diet

Check your obesity level and set a target weight.

DietGoal Setting

💪

Measure Exercise Effect

Track BMI regularly to monitor your exercise progress.

ExerciseTracking

🏥

Health Checkup Prep

Check and manage your BMI before health checkups.

CheckupPrevention

👶

Youth Weight Management

Monitor your teen's growth-stage weight status.

YouthGrowth

💡

Expert Tip

Don't judge health by BMI alone. Athletes with high muscle mass can be healthy despite high BMI. Normal BMI with high visceral fat means 'skinny fat'. Measure waist circumference and body fat percentage together for accurate health assessment. Waist over 90cm (men) or 85cm (women) indicates abdominal obesity.

— Korean Society for the Study of Obesity

❓ Frequently Asked Questions

What is the ideal weight for my height?

Use BMI 22 as a reference. For example, at 170cm height, ideal weight is about 63.6kg (1.7 × 1.7 × 22). Normal range (BMI 18.5-22.9) is 53.5-66.2kg.

💡 Our calculator automatically shows your ideal weight range!

Is BMI 23 overweight?

For Asians, BMI 23+ is classified as overweight. This differs from Western standards (25+). Asians tend to have more visceral fat at the same BMI, so stricter criteria apply.

💡 Asian standards are more accurate for Korean users!

Does muscle mass affect BMI?

Yes! BMI only considers weight, so high muscle mass can show high BMI even without obesity. Body fat percentage measurement (InBody) is more accurate. Standard is 15-20% for men, 20-25% for women.

💡 If you exercise regularly, we recommend body fat measurement!

Is BMI calculation different for children/teens?

Ages 2-20 use the same formula but different interpretation. Results are evaluated by percentile among same age/gender. 85-94th percentile is overweight, 95th+ is obese.

At what BMI is health at risk?

Health risks (diabetes, hypertension, cardiovascular disease) increase sharply at BMI 25+ (Obese Class I). BMI 30+ is severe obesity requiring active management. BMI below 18.5 also risks malnutrition and weakened immunity.

📌 Key Takeaways

📐BMI = Weight(kg) ÷ Height(m)² - simple calculation
📊Asian normal BMI is 18.5-22.9, 23+ is overweight
⚠️Don't judge health by BMI alone - check body fat too
📏Measure waist circumference for more accurate obesity assessment

📊 Complete BMI Guide

What is BMI?

BMI (Body Mass Index) is calculated by dividing weight (kg) by height (m) squared. It's a simple measure of obesity developed by Belgian statistician Adolphe Quetelet in the 1830s. It's widely used worldwide as a quick indicator of overall health status.

Asian BMI Classification

BMI Range	Classification	Health Risk
< 18.5	Underweight	Malnutrition risk
18.5 - 22.9	Normal	Low
23 - 24.9	Overweight	Slightly elevated
25 - 29.9	Obese Class I	High
≥ 30	Obese Class II	Very high

⚠️ Limitations of BMI

BMI doesn't account for muscle mass, body fat distribution, or bone density. Athletes may have high BMI despite being healthy. Elderly people may have normal BMI but high body fat due to muscle loss. Use BMI as a reference only and consult a healthcare professional for accurate health assessment.

🔗Related Calculators

🍎

Calorie Calculator

Daily calorie needs

📈

Compound Interest

Calculate compound growth

💼

Net Worth

Assets minus debts

🏦

Prepayment Fee

Loan prepayment penalty