Do you want to get the measure of the world around you? This book explores many aspects of measurement from the size of an atom or how to calculate a country's coastline to finding out the speed limit of the universe or how a computer tells the time. It explores all the different measures we use for lengths, areas, volumes and speeds, and shows you how to calculate them. The book is part of the MATHS IS EVERYWHERE series, which demystifies all aspects of maths and shows how it relates to your everyday world with fun, colourful graphics. These are fantastic books for children aged nine plus who are studying maths, or for anyone who wants to get to grips with maths in a fun way.