Is this a big number?

Free-form entry eg: '125000km', '1.5 million inches', '\$67bn', '45000000 AUD', 100years', '123456789', '1 trillion', '1.5e6', '25 million kg'

# Getting to Grips with Big

#### Numbers Astronomical and Beyond

IsThatABigNumber.com is about extending our number sense. We make comparisons that are (mostly) down-to-earth: populations of people and animals, national budgets, river lengths and so on.

But when we leave behind everyday experience and look at the kind of numbers you find in astronomy and in combinatorics, we come across vastly bigger numbers.

One strategy to grasp these numbers is to break them down into a series of levels, to see them as stupidly big aggregations of things that are themselves stupidly big aggregations of …  Here are some good clips illustrating this:

# For the Love of Numbers

#### The Number Line: A Journey

Wonderful tale by Ben Orlin “Math with Bad Drawings”, of a creature exploring the world of numbers, very much in the spirit of “Flatland”.

https://en.wikipedia.org/wiki/Flatland

# Landmark Numbers

#### Around the world in how long?

Jules Verne sent Phileas Fogg around the world in 80 days, but how far is that anyway? How fast would he have had to travel? How long would it take today to go around the world?

http://www.andrewcaelliott.com/explorations/2017/3/21/around-the-world-in-how-long

### Is That A Big Number? - The Book

Yes, there's now a book based on these numbers. Oxford University Press: July 2018.