VFD Flow & RPM vs Frequency Tool

For calculating the flowrate of your positive displacement pump at different frequencies.

Note: for PD pumps only.

Enter your known flow at 50 Hz and the pump RPM at 50 Hz. Optionally add a custom frequency.

Flow at 50 Hz Unit Pump RPM at 50 Hz Custom Hz (optional)

Frequency—

Flow—

RPM—

Values use linear scaling with frequency (Q ∝ Hz, RPM ∝ Hz). Rounded to the nearest 0.1.

Flow and RPM scaled linearly with frequency. Rounded to nearest 0.1.
Frequency (Hz)	Flow	RPM

Note: Q ∝ Hz, RPM ∝ Hz. Rounded to the nearest 0.1.

VFD FLOW & RPM VS FREQUENCY TOOL