year (solar mean)
1 a, y =
| Permeability coefficient | ||
| Symbol | Unit Name | |
| 3.15576×107 | kg-m/N-s | kilogram meter per newton per second |
| 2.17156×1019 | perm-inch (0 °C) | perm-inch (0°C) |
| 2.16253×1019 | perm-inch (23 °C) | perm-inch (23°C) |
| 2.17156×1022 | perm-mil (0 °C) | perm-mil (0°C) |
| 2.16253×1022 | perm-mil (23 °C) | perm-mil (23°C) |
| Time | ||
| Symbol | Unit Name | |
| 1.30463×1024 | a.u. | a.u. of time |
| 3.6525×107 | blink | |
| 365.25 | d | day |
| 366.25 | d (sider.) | day (sidereal) |
| 26.0893 | fortnight | |
| 8766 | h | hour |
| 3.35733×1030 | Jordan's elementary time | |
| 3.15576×1013 | ms | microsecond |
| 3.15576×1010 | ms | millisecond |
| 5.2596×105 | min, mn | minute |
| 12.175 | month (30 days) | |
| 13.3685 | month (sidereal) | |
| 12.0082 | month (solar mean) | |
| 12.3685 | month (synodic), lunar month | |
| 3.15576×1016 | ns | nanosecond |
| 3.15576×107 | s | second |
| 3.15576×1015 | shake | |
| 52.1786 | w | week |
| 9.46728×1016 | wink | |
| 0.999991 | aastr. | year (astronomical), Bessel year |
| 1.00068 | a, y | year (calendar) |
| 0.999983 | year (sidereal) | |
| 1.00002 | atrop. | year (tropical) |
