| Abbreviation | Unit | 1 Base Unit |
|---|---|---|
| s | second | 1 |
| 1/2 ms | half of millisecond | 0.0005 |
| 100 ka[t] | hundred thousand tropical-year | 3155692544500 |
| Ea[t] | million million million tropical-year | 3.1556925445E+25 |
| Ga[t] | thousand million tropical-year | 31556925445000000 |
| Ma[t] | million tropical-year | 31556925445000 |
| Ta[t] | million million tropical-year | 3.1556925445E+19 |
| a | julian-year | 31557600 |
| a[t] | tropical-year | 31556925.445 |
| ca | hundredth of julian-year | 315576 |
| cs | centisecond | 0.01 |
| d | day | 86400 |
| ds | decisecond | 0.1 |
| fa | femtojulian-year | 3.15576E-08 |
| h | hour | 3600 |
| hs | hectosecond | 100 |
| ka[t] | thousand tropical-year | 31556925445 |
| min | minute | 60 |
| ms | millisecond | 0.001 |
| na | nanojulian-year | 0.0315576 |
| ns | nanosecond | 1E-09 |
| ps | picosecond | 1E-12 |
| us | microsecond | 1E-06 |
| wk | week | 604800 |
| w | week | 604800 |
| month | average month in tropical-year | 2629743.7870833334 |
| mo | average month in tropical-year | 2629743.7870833334 |
| y | tropical-year | 31556925.445 |