BMI Calculator - Check Your Body Mass Index Free

🏋️ 100% Free · Instant Result · Full Health Report

BMI Calculator
Know Your Body Mass Index

The premium BMI calculator by Azo Mart Tools — calculate your Body Mass Index, ideal weight range, BMR, daily calorie needs and body fat percentage. Free, no signup, and 100% private.

  Your Details
Tip: 1 ft = 30.48 cm, 1 in = 2.54 cm
🏋️
Ready to Check Your BMI
Fill in your details and click Calculate BMI to see your Body Mass Index, ideal weight range, and daily calorie needs.
  BMI Classification (WHO Standard)
BMI Range Category Health Risk
Below 16.0 Severe Thinness Very High
16.0 – 16.9 Moderate Thinness High
17.0 – 18.4 Mild Thinness Moderate
18.5 – 24.9 Normal Weight ✓ Low
25.0 – 29.9 Overweight Increased
30.0 – 34.9 Obese Class I High
35.0 – 39.9 Obese Class II Very High
40.0 + Obese Class III Extremely High
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WHO Standard
Unlimited Free

Why Use Azo Mart BMI Calculator?

Complete health insights — free, accurate, and private.

Instant BMI

Get your Body Mass Index in seconds with category and health risk.

Ideal Weight

See the healthy weight range for your height and how much to lose/gain.

Calorie Needs

BMR and daily calorie targets to maintain, lose, or gain weight.

Body Fat Estimate

Get an estimated body fat percentage based on BMI, age, and gender.

Metric & Imperial

Switch between kg/cm and lb/ft+in with one click.

100% Private

All calculations in your browser. Your health data never leaves your device.

How to Use — 3 Easy Steps

Check your BMI in under 30 seconds.

1

Enter Your Details

Add your age, gender, height, and weight. Pick metric or imperial.

2

Click Calculate

See your BMI, category, ideal weight range, and calorie needs.

3

Copy & Track

Copy your result to share with your doctor or track progress.

Frequently Asked Questions

Everything about BMI and body mass index.

What is BMI?

BMI stands for Body Mass Index. It's a measure of body fat based on your height and weight. Formula: BMI = weight (kg) / height² (m²). It's a quick screening tool used by doctors worldwide.

What is a healthy BMI range?

According to WHO (World Health Organization):
• Under 18.5 = Underweight
• 18.5 to 24.9 = Normal / Healthy
• 25.0 to 29.9 = Overweight
• 30.0 and above = Obese

Is BMI accurate for everyone?

BMI is a general screening tool, not a diagnostic. It may not be accurate for athletes, bodybuilders, pregnant women, elderly people, growing children, or people with very tall/short frames. Always consult a doctor for personalized advice.

Does BMI differ for men and women?

The BMI formula itself is the same for men and women. However, women naturally tend to have more body fat than men at the same BMI. That's why we also show an estimated body fat percentage based on your gender and age.

What is BMR and how is it different from BMI?

BMI measures whether your weight is healthy for your height. BMR (Basal Metabolic Rate) measures how many calories your body burns at complete rest in a day. We use the Mifflin-St Jeor formula to calculate your BMR and daily calorie needs.

Is this BMI calculator free?

Yes, 100% free with no signup, no payment, and no limits. And 100% private — everything runs in your browser.

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