Most people guess about their weight — “I feel fine, so I must be okay.” But feeling fine and actually being in a healthy range aren’t always the same thing. BMI isn’t the whole picture, but it gives you a real number to work with instead of just guessing.
Use the calculator below to find your BMI and see what your number actually means.
Use the calculator below to find your BMI — and if you’re looking to improve your overall health, check out our sleep and wellness guide too. Poor sleep and unhealthy weight often go hand in hand.
BMI Calculator
Calculate your Body Mass Index and find out which category you fall into.
For adults 18+. Not a medical diagnosis — consult a healthcare professional for personalized advice.
How Is BMI Calculated?
It's just weight and height plugged into a formula:
BMI = Weight (kg) ÷ Height² (m²)
So say someone weighs 70 kg and stands 1.70 meters tall — their BMI comes out to around 24.2.
BMI Categories:
Your number falls into one of four buckets:
- Underweight: Below 18.5
- Healthy Weight: 18.5 to 24.9
- Overweight: 25.0 to 29.9
- Obesity: 30.0 and above
Why Does BMI Matter?
It's not a diagnosis — think of it more like a warning light on your dashboard. Your doctor won't treat you based on BMI alone, but if your number falls outside the healthy range, it's usually a sign worth paying attention to. People who stay in that 18.5 to 24.9 range tend to have lower chances of running into heart problems, blood pressure issues, or type 2 diabetes — not guaranteed, but the odds are better.
How to Use the BMI Calculator:
- Enter your weight in kilograms.
- Enter your height in centimetres.
- Hit calculate
- See your BMI score and which category you fall into