What is a healthy BMI?

According to NHS guidelines: Under 18.5 = underweight, 18.5–24.9 = healthy weight, 25–29.9 = overweight, 30+ = obese. BMI is a screening tool and not a diagnostic measure.

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health

BMI Calculator

Calculate your BMI and see which health category you fall into. Includes NHS guidelines and healthy weight ranges.

BMI CalculatorFree · No signup

Weight (kg)

Height (cm)

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About This Calculator

Our BMI Calculator is designed specifically for UK businesses and individuals. All calculations use current 2025/26 rates and follow UK guidelines.

This tool is completely free to use with no signup required. You can use it as many times as you like. The results are instant and calculated in your browser — no data is sent to our servers.

Also known as

BMI calculatorBMI calculator UKbody mass index calculatorhealthy weight calculatoram I overweight calculator

Frequently Asked Questions

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Last updated: 1 April 2026 · Rates for 2025/26 tax year