Gear Ratio Calculator

Different Gears and How Many Teeth They Have

12T

24T

36T

48T

60T

72T

84T

Different Sprockets and How Many Spokes They Have

Images with 'H' next to them mean high strength.

6T - H

8T

12T - H

16T

18T - H

24T

24T - H

30T - H

32T

40T

Equations To Calculate The Above Results

How we calculate the gear ratio is by using this equation:
Gear Ratio = (Number of Teeth on Gear 1 / Number of Teeth on Gear 2)
The gear ratio represents the relationship between the sizes of two gears. It determines how many times one gear will turn concerning the other, affecting the speed and torque of the system.

How we calculate the RPM is by using this equation:
RPM = (Motor RPM / Gear Ratio)
RPM is the number of revolutions a wheel or mechanism makes in a minute. It is influenced by the motor RPM and the gear ratio.

How we calculate the MPH is by using this equation:
MPH = (Speed in Inches Per Minute / Inches Per Revolution) * (60 / 5280)
MPH calculates the speed of the robot in miles per hour. It depends on the speed of the robot in inches per minute and the conversion factor to miles.