Space Heater Electricity Calculator in Idaho

A space heater in Idaho costs about $22.86 a month ($278.13 a year) to run at the state's average rate of 12.70 ¢/kWh. Use this calculator to compare light, typical, and heavy use.

Idaho average rate
12.70 ¢/kWh
Assumed wattage
1,500 W
Typical usage pattern
4 hours/day
Typical monthly cost
$22.86
Typical yearly cost
$278.13

Key metrics

MetricValue
Idaho average rate12.70 ¢/kWh
Assumed wattage1,500 W
Typical usage pattern4 hours/day
Typical monthly cost$22.86
Typical yearly cost$278.13

Space Heater in Idaho vs U.S. benchmark

Idaho monthly estimate
$22.86
U.S. monthly estimate
$34.78
Difference
-$11.92
State rate
12.70 ¢/kWh

Calculator assumptions

This calculator uses a typical wattage range of 750-1,500 W, and we assume 1,500 watts for 4 hours/day. The formula is kWh = (watts × hours) / 1000.

At this profile, the appliance uses 180.0 kWh per month and 2190.0 kWh per year.

Appliance calculator scenarios

ScenarioHours/dayAnnual energyIdaho monthlyU.S. monthlyIdaho yearly
Light usage2 hours/day1095.0 kWh$11.43$17.39$139.06
Typical usage4 hours/day2190.0 kWh$22.86$34.78$278.13
Heavy usage6 hours/day3285.0 kWh$34.29$52.16$417.19

Appliance cost reference page

Want the full write-up? The appliance page below uses the same rate and wattage assumptions:

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Source & Method

Source: U.S. Energy Information Administration (EIA) Retail Sales of Electricity. Updated: April 2026. Estimates use the EIA all-in average residential rate — energy, delivery, fixed charges, and utility fees together, not just the electricity itself. Fees are inside the rate, not an extra on top; how your own bill splits fixed versus per-kWh charges varies by utility. For what's inside the all-in rate, see hidden electricity fees; for how rates and estimates are defined, see the methodology hub.

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