- Enter your height in centimeters and weight in kilograms.
- Your BMI is shown instantly, with a progress bar spanning the underweight-to-obese scale.
- Read your category and the healthy weight range for your height to see where you stand.
Everything is calculated locally in your browser. No data is stored or uploaded.
BMI is one of the most common health screening numbers worldwide. Doctors use it in routine checkups, insurers reference it, and people track it during fitness or weight-management plans. Because it only needs height and weight, it is quick to compute but still gives a useful first signal about body composition.
Tips
Adjust height or weight and watch the marker move along the bar in real time — it helps you see exactly how much change moves you between categories. Remember the range shown is for adults; children and teenagers use different age-adjusted charts.
Why use it
Mental arithmetic for BMI is easy to get wrong, and online calculators often clutter the result with ads or require sign-up. This one works offline in your browser, updates live as you type, and simultaneously shows your category and target range — everything you need to screen your status in seconds.
Real-world use cases
- Home buying: Estimate monthly payment and total interest before talking to a bank. Adjust years vs. rate to see the trade-off.
- Budgeting: Use percentage and discount calculators to quickly check sale prices while shopping.
- Planning: Workday and unit converters save time when coordinating across teams and regions.
How accurate is it?
Results use standard formulas with double-precision floats, matching Excel and banking calculators to within cents. Assumptions are shown in the note (e.g., monthly compounding). For legally binding totals, confirm with the provider because fees, insurance and rounding rules differ.
Pro tips
- For loans, compare equal-payment vs equal-principal: the latter starts higher but pays less interest overall.
- For fuel and discount math, keep one decimal extra while comparing options, then round for display.
- Save results with a screenshot or copy; everything is local so refreshing clears the form.