One in seven billion - what's your number?

The world's seven billionth person will be born on October the 31st, but what number are you? Photo / Thinkstock

The world's seven billionth person will be born on October the 31, but what number are you?

Now you can find out online.

Plug your birth date into the web site whats-your-number.org to see where you sit on the graph.

The site gives you a point on a steeply accelerating graph that tells you how many people were on the planet when you arrived on it.