BMI Calculator

Calculate your Body Mass Index, see where you fall on the scale, and find your healthy weight range.

System Weight (kg) Height (cm)

BMI: 22.9 | Normal

Underweight
<18.5Normal
18.5–25Overweight
25–30Obese
>30

Healthy weight range: 56.7 kg – 76.6 kg

The BMI calculator computes your Body Mass Index — a quick way to see whether your weight is healthy for your height. It works with both metric (kg/cm) and imperial (lb/ft) units.

Unlike basic BMI tools, Numbrary shows your result on a color-coded scale from underweight to obese, with a marker showing exactly where you fall, plus your healthy weight range for your height.

BMI categories: Underweight (below 18.5), Normal (18.5–24.9), Overweight (25–29.9), and Obese (30+).

Frequently Asked Questions

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered normal for most adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.

Is BMI accurate for everyone?

BMI is a screening tool, not a diagnosis. It can overestimate body fat in very muscular people and underestimate it in older adults. Use it as a general guide.

How is BMI calculated?

Metric: weight (kg) ÷ height (m)². Imperial: 703 × weight (lb) ÷ height (in)². This calculator does both automatically.

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