C | Einingar og umreiknistuðlar
| metri (m) | = 39.37 tommur (in.) = 1.094 stikur (yd) |
| sentimetri (cm) | = 0.01 m (exact, definition) |
| millimetri (mm) | = 0.001 m (exact, definition) |
| kílómetri (km) | = 1000 m (exact, definition) |
| angström (Å) | = 10 –8 cm (nákvæmt, skilgreining) = 10 –10 m (nákvæmt, skilgreining) |
| stika (yd) | = 0.9144 m |
| tomma (in.) | = 2.54 cm (nákvæmt, skilgreining) |
| míla (Bandarísk) | = 1.60934 km |
| lítri (L) | = 0.001 m 3 (nákvæmt, skilgreining) = 1000 cm 3 (nákvæmt, skilgreining) = 1.057 (bandarískt) kvart |
| millilítri (mL) | = 0.001 L (nákvæmt, skilgreining) = 1 cm 3 (nákvæmt, skilgreining) |
| míkrólítri (μL) (μL) | = 10 –6 L (nákvæmt, skilgreining) = 10 –3 cm 3 (nákvæmt, skilgreining) |
| vökvakvart (Bandarískt) | = 32 (bandarískar) vökvaúnsur (nákvæmt, skilgreining) = 0.25 (bandarískt) gallon (nákvæmt, skilgreining) = 0.9463 L |
| þurrt kvart | = 1.1012 L |
| rúmfet (bandarískt) | = 28.316 L |
| gram (g) | = 0.001 kg (nákvæmt, skilgreining) |
| milligram (mg) | = 0.001 g (exact, definition) |
| kílógram (kg) | = 1000 g (nákvæmt, skilgreining) = 2.205 lb 1 |
| tonn (metrískt) | =1000 kg (nákvæmt, skilgreining) = 2204.62 lb |
| únsa (oz) | = 28.35 g |
| pund (lb) | = 0.4535924 kg |
| tonn (stutt) | =2000 lb (nákvæmt, skilgreining) = 907.185 kg |
| tonn (langt) | = 2240 lb (nákvæmt, skilgreining) = 1.016 metratonn |
| 4.184 júl (J) | = 1 varmaefnafræðileg kaloría (cal) |
| 1 varmaefnafræðileg kaloría (cal) | = 4.184 × × 10 7 erg |
| erg | = 10 –7 J (exact, definition) |
| rafeindarvolt (eV) | = 1.60218 × × 10 −19 J = 23.061 kcal mol −1 |
| lítri∙loftjúpur | = 24.217 cal = 101.325 J (exact, definition) |
| fæðuhitaeining (Cal) | = 1000 cal (nákvæmt, skilgreining) = 4184 J |
| bresk varmaeining (BTU) | = 1054.804 J 2 |
| torr | = 1 mm Hg (nákvæmt, skilgreining) |
| paskal (Pa) | = N m –2 (nákvæmt, skilgreining) = kg m –1 s –2 (nákvæmt, skilgreining) |
| loftjúpur (atm) | = 760 mm Hg (nákvæmt, skilgreining) = 760 torr (nákvæmt, skilgreining) = 101,325 N m –2 (nákvæmt, skilgreining) = 101,325 Pa (nákvæmt, skilgreining) |
| bar | = 10 5 Pa (nákvæmt, skilgreining) = 10 5 kg m –1 s –2 (nákvæmt, skilgreining) |