Is BMI accurate for athletes?

BMI can overestimate risk for muscular individuals, so use it as a general screening metric.

What is a normal BMI range?

A BMI between 18.5 and 24.9 is generally considered normal for adults.

Can BMI replace medical advice?

No, BMI is informational and should not replace diagnosis from healthcare professionals.

What is a healthy BMI for adults?

For most adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight; 25–29.9 is overweight; 30 and above is obese.

How do I calculate BMI manually?

Divide your weight in kilograms by your height in metres squared. For example, 70 kg ÷ (1.75 × 1.75) = 22.86 BMI.

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BMI Calculator

Check BMI category and healthy weight range from height and weight.

Body Inputs

Compute BMI with healthy-range guidance in one click.

Height (cm)

Weight (kg)

BMI Result

Use category and healthy range as a quick screening guide.

Body Mass Index

0.00

Live result

CategoryNormal

Healthy Min0.0 kg

Healthy Max0.0 kg

Why use this BMI Calculator

Built for speed, clarity, and SEO depth.

The BMI Calculator lets you check your body mass index online free using your height and weight. It instantly returns your BMI value, weight category (underweight, normal weight, overweight, or obese), and healthy weight range based on WHO guidelines. BMI calculator for men and women works identically since the formula is weight-neutral — only height and weight in kilograms and centimetres are needed. While BMI is not a clinical diagnosis, it is widely used as a first-pass wellness screening metric by doctors, fitness coaches, and health insurance providers. Use this free BMI calculator to track changes over time or prepare for a medical appointment. The formula section below explains how BMI is calculated step by step, and the FAQ covers common questions about BMI ranges, limitations for athletes, and what a healthy BMI looks like for adults.

BMI Formula

Standard equation used globally for BMI estimation.

Body Mass Index

BMI = weight(kg) / height(m)^2

Divides body weight by squared height in meters.

Healthy Weight Range

min = 18.5 x h^2, max = 24.9 x h^2

Uses standard BMI band thresholds to estimate healthy range.

Frequently Asked Questions

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Body Mass Index

Healthy Weight Range

Frequently Asked Questions

Is BMI accurate for athletes?

What is a normal BMI range?

Can BMI replace medical advice?

What is a healthy BMI for adults?

How do I calculate BMI manually?

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