Gearing Calculator

(work out how fast your car can actually go in each gear)

                        

                        

                       

 

This is a Javascript routine to help the really Sad and Nerdy amongst us who loose sleep worrying about gear and final drive ratios. Enjoy! First you need to know your wheel diameter.

 

Width
in mm		 Profile Alloy diameter
in inches		 Total diameter
in mm

                                                  Then we can worry about the gearing. Default values are for the 3.0 E36 M3 Euro.

1st gear 2nd gear 3rd gear 4th gear 5th gear 6th gear Reverse Final drive
:1 :1 :1 :1 :1 :1 :1 :1
Gear
Engine speed RPM
Speed MPH mph
Speed Km/h km/h