Is BMI a medical diagnosis?
No. BMI is a screening metric, not a diagnosis. It should be used as a general reference only.
calculators tool
BMI Calculator
Calculate BMI with live-linked cm, feet, inches, kg, and lb inputs while viewing healthy weight ranges in both systems.
Enter height and weight in cm, feet, inches, kg, or lb to estimate BMI instantly.
This BMI calculator keeps metric and imperial measurements linked in real time so you can type in the unit system that feels natural and still compare both outputs clearly.
Linked body measurements
Type in centimeters, feet and inches, kilograms, or pounds. The paired values update live using the shared converter rules.
Height
Edit either system. Both stay synchronized instantly.
Or
Meters
1.7 m
Total inches
66.93 in
Weight
Use kilograms or pounds and compare the converted value right away.
Or
Live conversion
68 kg = 149.91 lb
BMI result
23.53
This is a quick screening estimate based on your live-linked height and weight entries.
Current category
Healthy range
A BMI between 18.5 and 24.9 falls in the healthy screening range for this height.
Healthy range
53.5 kg - 72.0 kg
Shown in your preferred system
Other system
117.9 lb - 158.6 lb
Quick cross-check without converting
Measurement snapshot
- Height (metric)
- 170 cm
- Height (imperial)
- 5 ft 6.93 in
- Weight (metric)
- 68 kg
- Weight (imperial)
- 149.91 lb
How BMI is calculated
BMI = weight (kg) / height (m)^2
For imperial values, the tool first converts feet, inches, and pounds into metric units, then applies the same formula.
Category guide
Underweight
Healthy range
Overweight
Obesity
BMI is useful for fast screening, but it is not a diagnosis and should be read alongside broader health context.
About This Tool
This BMI calculator keeps metric and imperial measurements linked in real time so you can type in the unit system that feels natural.
It also shows healthy weight ranges in both kg and lb for the current height instead of forcing you to convert them separately.
How To Use
- 1. Enter height using centimeters or feet and inches.
- 2. Enter weight using kilograms or pounds.
- 3. Review BMI, category, and healthy weight ranges in both metric and imperial units.
BMI Categories Used in This Tool
- Underweight
- Healthy range
- Overweight
- Obesity
Frequently Asked Questions
Can I switch between centimeters, feet, kilograms, and pounds here?
Yes. The tool keeps those height and weight inputs synchronized live so you can enter values in whichever unit system you prefer.