RPM Drop Calculator
SI
Imp
Imperial
Inputs
View results
Shift RPM
(n_1)
Engine speed before the shift.
rpm
Current gear ratio
(G_1)
Gear ratio before the shift.
Next gear ratio
(G_2)
Gear ratio after the shift.
Minimum useful RPM
(n_min)
Lowest RPM you want to land above after the shift.
rpm
Results
Default result
Edit inputs
After-shift RPM
(n_2)
4,488
rpm
Out of tol.
Also computed
RPM drop
2,012
rpm
Drop
31.0
%
Power-band margin
Out of tol.
−12
rpm
Method notes
2 notes
The ratio method assumes road speed is unchanged during the shift.
Use dyno data or logged acceleration to choose the actual shift point; this page only checks gear spacing.
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