VFD Energy Savings Calculator
VFD Energy Savings Calculator
Estimate savings for pumps & fans. Use measured baseline kW for best accuracy; otherwise start with the throttling estimate.
Motor & Utility
Baseline (No VFD)
Load Profile
Add operating points. Flow % ≈ speed % for VT loads. Hours/yr can be seasonal or weekly×52.
Flow % Hours/yr Min Speed %
Example: 50% for 3000h, 75% for 2000h, 100% for 760h.
Validate results with field measurements (kW vs. speed) and your system curve before proposals.
Results
Baseline Energy
–
kWh / year
With VFD
–
kWh / year
Annual Savings
–
kWh / year
Annual $ Savings
–
USD / year
Simple Payback
–
years
CO₂ Avoided (est.)
–
metric tons / year (0.39 kg/kWh)
Note: This calculator uses a standard cubic power model for variable-torque loads. Actual energy savings may vary with real operating data.

Energy Savings Disclaimer

The results from this tool are estimates only intended for preliminary evaluation of potential energy savings when using a Variable Frequency Drive (VFD). Actual savings will vary based on sytem curve, efficiencies, duty cycle, and field conditions

For a more accurate estimate, collect measured motor kW vs. speed data under actual operating conditions. Energy Management Corp makes no guarantee of performance or cost savings based solely on these calculator results.

Need a site-specific assessment or proposal based on field data? Write us here, or us at call 1-800-800-2266.