OpusDesk Hub What this tool does
Calculate adult body mass index from height and weight. Metric BMI = weight in kilograms ÷ (height in metres)²; centimetres are divided by 100 first. Imperial mode uses 703 × pounds ÷ inches². The displayed value is rounded to one decimal place and the category is selected from that rounded value.
How to use BMI Calculator
- Prepare the input. Choose metric or imperial units.
- Run or configure the tool. Enter height and weight in the units on the labels.
- Check and use the output. Calculate and read the assumptions before interpreting the number.
How this tool works
Metric BMI = weight in kilograms ÷ (height in metres)²; centimetres are divided by 100 first. Imperial mode uses 703 × pounds ÷ inches². The displayed value is rounded to one decimal place and the category is selected from that rounded value.
Worked example
Input: Metric mode; height 175 cm; weight 70 kg
Output: 70 ÷ 1.75² = 22.857…; displayed BMI 22.9.
Limits, assumptions and interpretation
Height and weight must be positive and produce a finite result. Enter total inches, not feet-and-inches text, in imperial mode.
- Adult BMI is a screening measure, not a diagnosis or personal medical advice; it does not measure body fat or distinguish muscle from fat.
- Children and teens need age- and sex-specific assessment; pregnancy and individual health circumstances need a clinician.
- Rounding can affect the label at a category boundary; keep the original measurements.
Supported inputs and limits
- Metric mode; height 175 cm; weight 70 kg
- Height and weight must be positive and produce a finite result. Enter total inches, not feet-and-inches text, in imperial mode.
- Adult BMI is a screening measure, not a diagnosis or personal medical advice; it does not measure body fat or distinguish muscle from fat.
- Children and teens need age- and sex-specific assessment; pregnancy and individual health circumstances need a clinician.
- Rounding can affect the label at a category boundary; keep the original measurements.
Sources and specifications
Adult screening, not a diagnosis
BMI compares weight with height, not body composition. Adult categories are not a child growth chart or individualized assessment. Discuss health decisions with a clinician.
CDC adult BMI categoriesFrequently asked questions
What does this tool actually do?
Metric BMI = weight in kilograms ÷ (height in metres)²; centimetres are divided by 100 first. Imperial mode uses 703 × pounds ÷ inches². The displayed value is rounded to one decimal place and the category is selected from that rounded value.
What should I check before using the result?
Height and weight must be positive and produce a finite result. Enter total inches, not feet-and-inches text, in imperial mode. Adult BMI is a screening measure, not a diagnosis or personal medical advice; it does not measure body fat or distinguish muscle from fat. Children and teens need age- and sex-specific assessment; pregnancy and individual health circumstances need a clinician. Rounding can affect the label at a category boundary; keep the original measurements.
Is information sent to a server?
Tool inputs are processed in this browser. This product does not use analytics or send your input to an external API. Clicking an external website link still visits that website.