Horsepower Calculator

Vehicle Weight: lbs
Quarter Mile Time (ET): sec
Quarter Mile Trap Speed: mph
   


RPM Calculator
Gear Ratio (3.08, 3.55):
Tire Radius (24.5, 26, 27.5):
Miles Per Hour:
   
Your RPM =


Speed Calculator
RPM
Rear Axle Gear ratio (3.08, 3.55)
Transmission Gear ratio (2.54, 1.43, 1.00)
Tire diameter in inches (24.5, 26, 27.5)


Your speed is MPH

The same tire and RPM's will give the following speeds based on the following gear ratio changes.

2.59 2.73 3.08 3.36 3.55 3.70 4.11 4.56



PSI: BAR:

BAR: PSI:

PSI
BAR
  
BAR
PSI
11
0.75
0.75
10.9
12
0.83
0.80
11.6
13
0.90
0.85
12.3
14
0.97
0.90
13.1
15
1.03
0.95
13.8
16
1.10
1.00
14.5
17
1.17
1.05
15.2
18
1.24
1.10
16.0
19
1.31
1.15
16.7
20
1.38
1.20
17.4
21
1.45
1.25
18.1
22
1.52
1.30
18.9
23
1.57
1.35
19.6
24
1.65
1.50
21.8
25
1.72
1.60
23.2

 

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