The gal (symbol: Gal), sometimes called galileo after Galileo Galilei, is a unit of acceleration used extensively in the science of gravimetry. The gal is defined as 1 centimeter per second squared (1 cm/s2). The milligal (mGal) and microgal (µGal) refer respectively to one thousandth and one millionth of a gal.
| Definition | Relation to SI units |
|---|---|
= 10−2 m/s2 |
| (decameter per minute) per second | standard gravity | inch per (second squared) | decameter per (second squared) | (yard per minute) per second | mile per (second squared) | (decameter per hour) per second | (decimeter per minute) per second |
|---|---|---|---|---|---|---|---|
| 1 | 0.0169953 | 6.5616798 | 0.0166667 | 10.9361330 | 0.0001036 | 60 | 100 |
| 58.8399 | 1 | 386.0885827 | 0.980665 | 643.4809711 | 0.0060936 | 3,530.394 | 5,883.99 |
| 0.1524 | 0.0025901 | 1 | 0.00254 | 1.6666667 | 1.5782828282828 × 10-5 | 9.144 | 15.24 |
| 60 | 1.0197162 | 393.7007874 | 1 | 656.1679790 | 0.0062137 | 3 600 | 6 000 |
| 0.09144 | 0.0015540 | 0.6 | 0.001524 | 1 | 9.469696969697 × 10-6 | 5.4864 | 9.144 |
| 9,656.064 | 164.1074169 | 63 360 | 160.9344 | 105 600 | 1 | 579,363.84 | 965,606.4 |
| 0.0166667 | 0.0002833 | 0.1093613 | 0.0002778 | 0.1822689 | 1.7260310895481 × 10-6 | 1 | 1.6666667 |
| 0.01 | 0.0001700 | 0.0656168 | 0.0001667 | 0.1093613 | 1.0356186537289 × 10-6 | 0.6 | 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
| 1 gals | = 0.01 meters per (second squared) |
| 2 gals | = 0.02 meters per (second squared) |
| 3 gals | = 0.03 meters per (second squared) |
| 4 gals | = 0.04 meters per (second squared) |
| 5 gals | = 0.05 meters per (second squared) |