Home & outdoor: electricity cost calculators
Pools, hot tubs, workshops and everything else around the house. Every calculator below starts from a realistic wattage and runtime preset and uses your state's average residential electricity price (May 2026 EIA data) — or the exact rate from your bill.
Most expensive to run
Typical monthly cost while in use, at the U.S. average price of 18.44¢/kWh.
| Appliance | Preset | Per month in use |
|---|---|---|
| Garage heater | ~5,000 W · 4h/day | $112 |
| Hot tub | ~3,000 W · 3h/day | $51 |
| Heated floor | ~1,200 W · 6h/day | $40 |
| Pool pump | ~1,100 W · 6h/day | $37 |
| Electric sauna | ~6,000 W · 1h/day | $34 |
All 9 calculators
Pool pump A quiet four-figure annual cost in many sunbelt homes.
~1,100 W · 6h/day →
Hot tub Mostly a water heater that lives outside.
~3,000 W · 3h/day →
Electric sauna A big heater used in short sessions.
~6,000 W · 1h/day →
Heated floor About 12 watts per square foot, every hour it's on.
~1,200 W · 6h/day →
Garage heater Heating an uninsulated garage is the expensive part.
~5,000 W · 4h/day →
Aquarium Heater, filter, lights — a small but constant load.
~100 W · 12h/day →
Grow lights Long photoperiods make wattage really matter.
~400 W · 14h/day →
E-bike charging Pennies per charge — the cheapest vehicle you own.
~150 W · 3h/day →
Electric scooter charging A commuter scooter charges for well under a dime.
~120 W · 4h/day →
Other categories
How these estimates work
Cost = watts ÷ 1,000 × hours × price per kWh. Prices are average residential prices by state from the EIA Electric Power Monthly, Table 5.6.A (May 2026), refreshed automatically each month. EIA averages include delivery and taxes but are not any specific utility tariff.