Health
BMI Calculator (Metric)
Measure body mass index using kilograms and centimeters, then see the World Health Organization weight class instantly.
Height in centimeters, weight in kilograms—instantly classify BMI.
BMI (metric units)
BMI = weight_kg ÷ (height_m)²
The calculator converts your height from centimeters to meters before applying the standard BMI equation.
How to use
- Enter your height in centimeters.
- Enter your weight in kilograms.
- Review the BMI score and category label shown beneath the inputs.
Example
Input: Height = 170 cm, Weight = 68 kg
Output: BMI ≈ 23.5 (Normal weight)
Student-friendly breakdown
This walkthrough emphasizes the most searched ideas for BMI Calculator (Metric): bmi calculator, body mass index calculator, bmi calculator metric, bmi chart calculator. Start with the formula above, then follow the guided steps to double-check your work. For quick revision, highlight the givens, plug into the equation, and finish by verifying your units.
Need more support? Use the links below to open the long-form guide, browse additional examples, or hop into adjacent calculators within the same topic — each one is a quick way to double-check your work or handle a related question without starting from scratch.
Deep dive & study plan
BMI Calculator (Metric): Metric-friendly BMI with category classification. It's built around health, bmi, metric, so you can go from a raw question to a checked answer without switching tools.
The math behind it: The calculator converts your height from centimeters to meters before applying the standard BMI equation. The core relationship is BMI = weight_kg ÷ (height_m)², shown above the calculator so you can see exactly how your inputs turn into the result.
To use it well: (1) Enter your height in centimeters. (2) Enter your weight in kilograms. (3) Review the BMI score and category label shown beneath the inputs. Keep your units consistent as you go, and re-run a case you already know the answer to — it's the fastest way to catch a typo before it throws off a result you're relying on.
Worked example: entering Height = 170 cm, Weight = 68 kg returns BMI ≈ 23.5 (Normal weight). Try swapping in your own numbers next, especially a case you're unsure about, before you use this for something that matters.
Quick retention checklist
- Speak the formula aloud (or annotate it) so the relationships stick.
- Write each step in your own words and compare with the numbered list above.
- Swap in new numbers for the Example to make sure the calculator (and your logic) handles edge cases.
- Check at least one related calculator below — it's the fastest way to confirm your numbers still line up from a different angle.
FAQ & notes
Why does BMI sometimes feel inaccurate?
BMI is a population-level screening tool and does not distinguish between muscle and fat mass, so athletic builds may score higher despite healthy composition.
How is this different from the imperial calculator?
This version expects metric inputs. The imperial calculator converts feet, inches, and pounds before applying the same BMI formula.
What formula does the BMI Calculator (Metric) use?
The calculator converts your height from centimeters to meters before applying the standard BMI equation.
How do I use the BMI Calculator (Metric)?
Enter your height in centimeters. Enter your weight in kilograms. Review the BMI score and category label shown beneath the inputs.