Motor systems
VFD Motor Speed Calculator
Estimate motor RPM from base speed, drive frequency, base frequency, and a slip assumption.
Systems worksheet
Calculation inputs
RPM
Hz
Hz
%
Calculated result
1,309.5 RPM
Planning estimateConfirm equipment ratings, manufacturer limits, adopted code requirements, and system-specific calculations before installation.
Method and field check
The estimate scales base speed by frequency and subtracts the entered slip assumption. Confirm drive mode, motor cooling, torque, and mechanical limits.