Electricity Cost Calculator

This electricity cost calculator tells you exactly what any appliance, piece of equipment, or lighting fixture costs to run — per day, month, or year. Enter the device wattage, daily operating hours, and your utility rate per kWh, and you’ll have the annual cost in seconds. It’s the starting point for every energy savings conversation: you can’t model savings without knowing what you’re currently spending.

Electricity cost calculator rate reference — US average electricity rates by region
Enter any appliance or device’s wattage and usage to instantly see what it costs you — per day, per month, and per year. Check your utility bill for your exact electricity rate.

Device Details

Find on the device label or manual. e.g. space heater: 1,500W; LED bulb: 10W
Average daily runtime
30 for daily use; fewer for seasonal items
US average ~$0.13. NY average ~$0.19. Check your utility bill.

Your Electricity Cost

$—
Monthly Cost
$—
Daily Cost
$—
Annual Cost

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Calculations based on user-provided inputs. Actual costs depend on your utility’s rate structure, demand charges, and time-of-use pricing. Check your utility bill for your exact rate. Results do not constitute a professional energy audit.

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Electricity Cost Calculator — Frequently Asked Questions

What does this electricity cost calculator measure? +
This electricity cost calculator computes the annual operating cost of 3-phase motors and pumps based on nameplate horsepower, full-load efficiency, power factor, run hours, and your local electricity rate. It’s the standard baseline calculation before evaluating VFD retrofits, premium efficiency motor upgrades, or load reduction projects.
How do I find my motor’s full-load efficiency? +
Check the motor nameplate — NEMA Premium motors manufactured after 2011 must display nominal efficiency. For older motors, use the NEMA MG-1 table averages: standard efficiency motors typically run 87–93% depending on HP. If you can’t find nameplate data, use 88% as a conservative default for motors over 10 HP.
Can I use this electricity cost calculator for VFD savings? +
Yes — calculate the baseline cost at full load first, then reduce speed by 20% and recalculate. Because fan and pump power follows the cube law, a 20% speed reduction cuts power consumption by roughly 49%. The difference is your estimated annual VFD savings. For a full commercial analysis, see the Commercial Energy Audit ROI Calculator.

Now that you know your baseline costs, model the savings from specific upgrades: LED Lighting Savings Calculator — see how much switching to LED saves on your lighting bill. HVAC Energy Savings Calculator — model savings from an HVAC upgrade. Commercial Energy Audit ROI Calculator — determine whether a professional audit makes financial sense.