the metric system

Approximate Conversions from Customary to Metric Units and Vice Versa

When you know:	You can find:	If you multiply by:
Length inches feet yards miles millimeters centimeters meters kilometers	millimeters centimeters meters kilometers inches inches yards miles	25.4 30 0.9 1.6 0.04 0.4 1.1 0.62

A Brief History	Birth of the Metric System	The English System
Development Around the World	Conversions	Table of Measures