BMI Calculator
Your BMI is
Healthy weight for your height
56.7 – 76.3 kg
In the healthy range.
BMI Scale
BMI is a screening tool and not a diagnostic tool. Consult a healthcare professional for medical advice.
Body Mass Index without the fluff
BMI compares weight to height. It flags when weight is low or high for a given height.
Calculate your number above, then read below for context.
Quick formula
BMI = weight (kg) divided by height (m) squared. Imperial units are converted automatically.
Tip: divide height in centimetres by 100 to get metres before squaring.
What this tool does well
- Gives a repeatable measurement in seconds.
- Highlights when lifestyle or medical follow-up may be useful.
- Works for most adults when other lab data is unavailable.
BMI categories at a glance
Underweight
Under 18.5
Review your eating pattern, recent illness, or talk with a clinician if the number surprises you.
Healthy range
18.5 – 24.9
Stay active, eat well, and keep an eye on gradual changes over the year.
Overweight
25.0 – 29.9
Combine BMI with waist measurements or labs to decide on next steps.
Obesity
30.0 and higher
Pair this number with a doctor visit or structured program so you get support instead of guesswork.
How to get a reliable reading
- Pick metric or imperial units before entering numbers.
- Use a recent, morning weight for the most stable value.
- Measure height without shoes and stand tall against a wall.
- Re-check monthly or when your routine changes.
Make sense of the result
- Compare today’s BMI to last season, not just last week.
- Note symptoms such as fatigue, joint pain, or appetite changes.
- Share the number with your healthcare provider if you have diabetes, heart disease, or are pregnant.
When BMI is not enough
- Strength athletes can score high because of muscle, not fat.
- Kids and teens should use age-specific growth charts.
- Older adults with low muscle may have a “normal” BMI despite risk.
Quick answers
How often should I check BMI?
Once a month is plenty for most people. Log the value with the date so you can spot trends.
What if the number looks off?
Double-check that you used the right units, then compare against a tape-measure reading or body-fat scan if available.
Can BMI support a training goal?
Yes. Use BMI for a high-level target, then lean on strength tests, performance logs, or body-fat measurements for finer control.