SI Units and Prefixes

Includes the 7 base SI units, the 22 derived SI units, and the 20 prefixes. If a symbol cannot be produced on your keyboard, type the closest symbol to it (for example, you can type "0" or "o" for the degree symbol, "u" for the micro- symbol, and "O" for the ohm symbol).

Welcome to Memrise!

Join millions of people who are already learning for free on Memrise! It’s fast, it’s fun and it’s mind-bogglingly effective.