Gear Speed Table Calculator
SI
Imp
Imperial
Inputs
View results
Target engine RPM
(n)
Engine speed used to calculate speed in each gear.
rpm
Tire diameter
(D)
Loaded or calculated tire diameter.
in
Final drive ratio
Axle, differential or final-drive ratio.
Transfer ratio
Transfer-case or additional reduction ratio. Use 1 if none.
1st gear ratio
2nd gear ratio
3rd gear ratio
4th gear ratio
5th gear ratio
6th gear ratio
Results
Default result
Edit inputs
1st gear speed
38.51
mph
Speed = wheel RPM * tire circumference.
Also computed
2nd gear speed
64.19
mph
3rd gear speed
92.96
mph
4th gear speed
134.8
mph
5th gear speed
168.5
mph
6th gear speed
214
mph
1st overall ratio
13.06
6th overall ratio
2.35
6th gear wheel RPM
2,766
rpm
Tire circumference
81.68
in
Show 3 more results
Method notes
3 notes
Overall ratio = transmission gear ratio * final drive * transfer ratio.
Wheel RPM = engine RPM / overall ratio. Vehicle speed follows from tire circumference.
Use loaded tire diameter for best road-speed agreement. Converter slip, clutch slip, tire growth and rev limiter tolerance are not included.
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