A dictionary of units of measurement: explanations of the metric system, System Internationale (SI), English customary system, and other modern measuring systems. Plus extensive links to other measurement-related Internet resources.

Provides several methods for determining length, width and height.

Step-by-step, interactive tutorial for converting metric units.

Java metric conversion calculator for length, weight, pressure, and volume.

A site promoting the metric system which argues why metric is better and English is worse. Provides an English-metric online calculator.

Timed game will test how quick you can read a ruler.

Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions.

Measurement game - Game which has several levels of difficulty for both English and metric rulers.

Instructions on how to use metric and English rulers.

Features printable worksheets. Includes English and Metric System pages.