| % | percent | |
| A | ampere | SI |
| B | bel | |
| bp | basepair | |
| °C | degree Celsius | |
| cal | calorie | |
| d | days | |
| g | gram | |
| h | hours | |
| Hz | Hertz | SI |
| IU | international units | |
| kg | kilogram | SI |
| L | liter | |
| lx | lux | SI |
| m | meter | SI |
| M | molarity | |
| min | minute | |
| mo | months | |
| mol | mole | SI |
| N | Newton | SI |
| n | integer | |
| Pa | Pascal | SI |
| s | second | SI |
| U | units (case-specific) | |
| V | volt | SI |
| wks | weeks | |