Display kWh cost
Estimate season electricity use and cost from total display watts, hours per night, nights, and your $/kWh rate.
Formula
kWh = total_watts × hours_per_night × nights ÷ 1000 · cost = kWh × rate
FAQ
How do I total the watts?
Add nameplate watts for lights, inflatables, projectors, and controllers that run together.
Where is my $/kWh?
Your utility bill lists an energy charge per kWh; use that instead of a national average when possible.
Does a timer change the math?
Yes — shorter hours cut kWh linearly. Enter the hours the timer actually allows.
LED vs incandescent?
Use the LED watt savings calculator to compare two watt totals side by side.