Wheel Torque Calculator
SI
Imp
Imperial
Inputs
View results
Engine torque
(T_e)
Engine torque before drivetrain multiplication.
lbf·ft
Transmission ratio
(G)
Selected gear ratio.
Final drive ratio
(F)
Axle or differential ratio.
Transfer ratio
(T)
Transfer-case or auxiliary ratio. Use 1.0 if none.
Drivetrain efficiency
(eta)
Efficiency from engine output to the wheel.
%
Tire rolling radius
(r_t)
Rolling tire radius used to convert torque to contact force.
in
Results
Default result
Edit inputs
Wheel torque
(T_w)
2,600
lbf·ft
Pass
Also computed
Tire contact force
(F_t)
2,401
lbf
2,401 lbf
Overall ratio
13.055
Method notes
2 notes
Wheel torque is idealized engine torque times gear ratios and drivetrain efficiency.
Actual launch force is limited by tire grip, weight transfer, traction control, clutch or converter behavior and drivetrain strength.
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