Free calculator
Work out your range
Enter your mum’s and dad’s heights and pick a chart. You’ll get your adult height range. It’s a rough guide, not a promise.
Your two heights
It’s a rough guide, not a promise. You could finish outside it.
Show the working
Want it narrower?
For a narrower range, Plus uses the Khamis–Roche method. It takes what you’ve already given and adds your age, your height today and your weight today.
Centile Plus is for ages 13 to 17½, and it keeps every height check.
See Centile for iPhone and AndroidNothing here reaches us
This calculator runs in your browser. The heights you type are never sent to us and never saved. They’re gone when you close the page. There’s no account, no cookie, no analytics and no ad tracker here.
You can check that yourself. Open your browser’s developer tools, watch the network tab and press the button. Nothing leaves. Our privacy notice says the same in full.
What the app adds
Free in the app: your range from those three things, and how we got it. Plus adds your age, your height today and your weight today, for a narrower range. It charts every height check, compares you with people your age and reminds you monthly.
Centile is for ages 13 and over. It’s a guide, not medical advice. It can’t spot a growth problem. If you’re worried about your growth, talk to a doctor.