Measurements and Units
| Metric conversion, Currency converter and GPA Calculator Performs thousands of metric conversions with our easy to use tool that includes showing algebraic steps, saving your favorites, and more. Site also includes a currency converter and a GPA calculator, all free, with additional features that allow users to save and organize their GPA calculator inputs. | |
| Dictionary of Units, A - an explanation of the principle systems of units, their history, standards, and conversion factors for changing from one to the other. | |
| Lixcaliber - study of the Golden Section and Pi and their relationship to Earth Measure. | |
| Measurement Science Conference - promoting education and professionalism in measurement science and related disciplines, held annually in January. | |
| Metrology Forum - the science of measurement or calibration and associated topics. Enlightenment to the uninitiated and soul-food to practitioners of this art. | |
| Scales & Weights - photos of a collection of historical scales and weights, with trading opportunities. | |
| Weights and Measures and Standard Time - Chapter 6 of United States Code Title 15 - Commerce and Trade | |