Gear Ratio Calculator
Now available as free Android app:
Pair 1:
1 tooth
8 teeth
12 teeth
14 teeth
16 teeth
20 teeth
24 teeth
28 teeth
36 teeth
40 teeth
56 teeth
60 teeth
60 teeth
140 teeth
168 teeth
Pair 2:
Pair 3:
Pair 4:
Pair 5:
Pair 6:
Pair 7:
Pair 8:
Pair 9:
Pair 10:
Pair 11:
Pair 12:
Pair 13:
Pair 14:
Pair 15:
Pair 16:
Pair 17:
Pair 18:
Pair 19:
Pair 20:
Pair 21:
Pair 22:
Pair 23:
Pair 24:
Pair 25:
Final ratio: 1:1
Speed and torque are unaffected.
Show output for
How many:
motor(s):
| Teeth | Gears | ||||
|---|---|---|---|---|---|
1 |
 |
 |
 |
||
8 |
 |
||||
12 |
 |
 |
|||
14 |
 |
||||
16 |
 |
 |
 |
 |
|
20 |
 |
 |
 |
 |
|
24 |
 |
 |
 |
 |
|
28 |
 |
 |
 |
 |
 |
36 |
 |
||||
40 |
 |
||||
56 |
 |
 |
|||
60 |
 |
 |
|||
140 |
 |
||||
168 |
 |
||||
 |
Planetary gearing consists of three elements: a sun gear, a ring gear and a number of planet gears mounted on a carrier.
One of these elements is always fixed, one is an input and one is an output. Select gear sizes below and hit CALCULATE
to see ratios for all three cases.
|
The + marks the position of your driver gear's axle. Click an empty pin hole
to select the position of your follower gear's axle and see the available gear combinations:
Units: