| A Dictionary of Units: A summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a standard unit. |
| Apples4theteacher.com: Measure the teddy bears game. |
| Conversion Calculator: A simple calculator to convert between various units. |
| Convert-me.Com: Interactive calculators for many common and exotic measurement systems, including metric, Ancient Greek, Roman, and old Russian. |
| CyberSleuth: Units of Measurements Worksheets: Twenty-three printable worksheets for elementary school-aged children. Focuses primarily on conversion of units of length. |
| FAQ: How do I read a ruler?: Instructions on how to use metric and English rulers. |
| Funbrain.com: Measurement game - Game which has several levels of difficulty for both English and metric rulers. |
| GCSE Maths: Measurement: Includes length, area and volume and the use of prefixes in units. With worked examples and animations. |
| How Many?: 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. |
| How To Read A Ruler: Article describes all of those little lines and markings. |
| Jack's Math: Provides several methods for determining length, width and height. |
| Learning About Time: History and description of clocks with lessons on telling the time. Includes an interactive tutor. [Requires Java] |
| Measurement Worksheets: Features printable worksheets. Includes English and Metric System pages. |
| Measuring Angle and Distance with your Thumb: How to use body parts to estimate measurements. |
| Metric 4 US: A site promoting the metric system which argues why metric is better and English is worse. Provides an English-metric online calculator. |
| Metric Conversion: Java metric conversion calculator for length, weight, pressure, and volume. |
| Metric Conversion Chart: Online metric conversion calculator includes metric, US customary and Imperial unit conversions. |
| Metric Conversion Tables: Conversion factors and online calculators for metric and imperial units. |
| Metric Conversion Tutorial: Step-by-step, interactive tutorial for converting metric units. |
| Metric Measures: Offers equivalents for common measurements, plus how metric units are used in sports and the kitchen. |
| Online Units Conversion: Gives equal values for areas, volumes, circle measurements, computer storage, currencies, distance and length, energy, fuel consumption, power, pressure, speed, temperature, time, torque, and weights. |
| Origins of Measurements: Compares units of ancient times with modern ones. |
| Temperature Converter Fahrenheit Celsius (Centigrade): A temperature converter for Celsius and Fahrenheit. |
| The Modern Metric System: Dictionary of metric units explaining the principles and history of the system. |
| The Ruler Game: Timed game will test how quick you can read a ruler. |
| Unit Conversions: Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions. |
Classical
