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2nd Gear RPMs

vCalc Reviewed
`RPM_2 = ( "T1" * RPM_1 )/ "T2" `
`(RPM_1)"RPMs of gear 1"`
`(T1)"Teeth in gear 1"`
`(T2)"Teeth in gear 2"`

The 2 gear rpm equation calculates the RPMs of a second gear when the RPMs and number of teeth are known for the first gear and the number of teeth of the second gear is known,   

INSTRUCTIONS: Choose units and enter the following:

  • (RPM1) Rotation rate of gear 1
  • (T1) Teeth in gear 1
  • (T2) Teeth in gear 2

Rotation Rate of Gear 2: The calculator returns the rotation rate in revolutions per minute.  However this can be automatically converted to compatible units via the pull-down menu.

The Math / Science

The formula for the relationship between interlocked gears and their revolution speed is: 

`RPM_1 * T_1 = RPM_2 * T_2`


Simple Machine Calculators