- "Antoine frame-of-reference method"
- Examples of everyday item equivalences for metric units of length, mass, volume, and temperature.
- ConvertMe.com
- Interactive calculators for many measurement systems.
- ConvertIt
- Quick and easy measurement converter.
- A Dictionary of Units
- A summary of most of the units of measure used around the world. Also includes the conversion factors needed to change them into a 'standard' unit of the SI.
- Factmonster.com: Measurements
- Topics include: U.S. Weights and Measures, Metric Weights and Measures, The International System (Metric), Metric Conversions, Conversion Factors, Conversion of Miles to Kilometers and Kilometers to Miles, Fahrenheit and Celsius (Centigrade) Scales, Measuring Motion, Measuring Power, Nautical Measurement, How Early Measures Made Their Mark, Miscellaneous Units of Measure, Origins of Measurements, Cooking Measurement Equivalents, Standard Measurements in Sports, Polygons: How Many Sides?, Famous Math Minds.
- How Many? A Dictionary of Units of Measure
- Online Conversion
