BMI Calculator
Check where you stand. No sign-up required.
Calculate Your BMI
cm
kg
What is BMI?
BMI divides your weight by your height squared. It's a rough guide - not a diagnosis - but it's useful for spotting trends over time.
BMI Categories
Underweight: BMI less than
18.5
Normal: BMI 18.5 to 24.9
Overweight: BMI 25 to 29.9
Obese: BMI 30 or greater
BMI isn't everything
It doesn't know if you lift weights or just had a big lunch. Muscle, bone density, and body type all skew the number. Take it as one data point, not the whole picture.
Turn BMI into a trend line
Private • No account • 10 seconds
A single BMI is a snapshot. Log it regularly and spot real progress over weeks, without spreadsheets, sign-ups, or sharing your data.
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Open BMI Tracker
Tip: log once a week for the clearest trend.