How is BMI calculated?

BMI is weight in kilograms divided by height in metres squared. For example, 65 kg and 170 cm gives about 22.49.

Can BMI alone determine whether I am healthy?

No. BMI is a quick adult weight-status screening measure and does not account for muscle mass, body-fat percentage, or medical history. Consult a healthcare professional for an individual assessment.

Which BMI categories does this calculator use?

It uses Asian adult reference cutoffs—under 18.5, 18.5–22.9, 23–24.9, 25–29.9, 30–34.9, and 35 or above. The displayed reference weight range corresponds to BMI 18.5 or above and below 23.

How is the BMR estimate calculated?

When both age and sex are entered, the calculator applies the Mifflin–St Jeor equation. It is an estimate of resting daily energy use, not a calorie prescription.

Is this calculator suitable for children or teenagers?

No. Growing children and teenagers require age- and sex-specific BMI percentiles rather than adult cutoffs.

TOOLOG / WEB UTILITY

Adult BMI Calculator | Asian Cutoffs, Weight Range, and BMR

Calculate adult BMI with Asian-reference categories, the weight range for BMI 18.5–22.9, and an optional Mifflin–St Jeor BMR estimate.

Health/Fitness Runs in your browser

Try the tool

Enter your details below. Results update instantly.

Height (cm)

Weight (kg)

Age (optional)

Sex (optional)

-BMI

Waiting for inputAsian adult reference category

-BMI 18.5–22.9 weight range

-Basal metabolic rate (BMR)

Enter height and weight to calculate BMI and the reference weight range.

For adults only. Categories use Asian adult cutoffs; BMR uses the Mifflin–St Jeor equation when both age (18–100) and sex are entered. Results are screening estimates, not a diagnosis.

Check adult BMI with clearly stated Asian cutoffs

Enter height and weight to see BMI, an Asian adult reference category, and the weight range corresponding to BMI 18.5–22.9. Add both age and sex to estimate basal metabolic rate (BMR).

Key features

Real-time BMI calculation
Six clearly separated adult reference categories
Height-based BMI 18.5–22.9 weight range
Optional Mifflin–St Jeor BMR estimate
Empty, out-of-range, and incomplete optional-input feedback

How to use

Enter height (cm).
Enter weight (kg).
Optionally enter both a whole-number age from 18–100 and sex for BMR.
Review BMI, category, reference weight range, and BMR. You can also fill the sample values, copy a valid result, or clear all inputs.

Blank required fields, values outside the supported ranges, fractional ages, and incomplete age/sex pairs are explained beside the results.

Example calculation

Height: 170 cm
Weight: 65 kg

The BMI is about 22.49, which is in the normal range under this calculator’s Asian adult reference cutoffs. At the same height, the weight range corresponding to BMI 18.5–22.9 is approximately 53.5–66.2 kg.

Notes

BMI and BMR are adult screening estimates, not diagnoses or prescriptions.
Athletes or high-muscle individuals may need additional body-composition checks.
Do not apply these adult categories during pregnancy or to growing children.

Formula and category boundaries

BMI = weight (kg) ÷ height (m)².
Categories: under 18.5, 18.5–22.9, 23–24.9, 25–29.9, 30–34.9, and 35 or above.
BMR uses weight, height, whole-number age from 18–100, and sex in the Mifflin–St Jeor equation.

Add circumference context: Body Fat Calculator
Estimate daily energy needs: TDEE Calculator
Check exact age: Age Calculator

Summary

This adult BMI calculator combines an Asian-reference weight category, a BMI-based weight range, and an optional BMR estimate. Use the result as a starting point for personal health planning, not as a diagnosis.