Is a mini-split expensive to run?

Set it and leave it — inverter systems are cheapest when they hold a steady temperature instead of being switched on and off. At typical use it adds about $40.10 to a monthly electric bill at the US-average rate, but that swings from $28.01 in the cheapest states to $104.29 in the most expensive.

How many watts does a mini-split use?

Mini-Split typically draws about 1,000 running watts. Because it has a motor or compressor, it briefly spikes to around 1,500 watts at startup, which matters for generator and breaker sizing but not for energy cost. Check the nameplate or label on your specific unit for its exact rating.

How much electricity (kWh) does a mini-split use?

At typical use (1,000 W for 8 hours a day), a mini-split uses about 8.0 kWh per day — roughly 243 kWh per month, or about 28% of what the average US home uses in a month (863 kWh). Energy used doesn't depend on your electricity rate — only the bill does.

How can I lower the cost of running a mini-split?

Set it and leave it — inverter systems are cheapest when they hold a steady temperature instead of being switched on and off. You can also cut the cost by lowering your electricity rate — many utilities offer cheaper off-peak hours — or simply by running it fewer hours. The calculator on this page shows how changing hours per day or your electricity rate moves the number.

How Much Does It Cost to Run a Mini-Split?

An inverter mini-split ramps its compressor up and down instead of cycling, so its average draw is far below its nameplate watts. At the US-average rate of 16.5¢/kWh, running a mini-split costs about $40.10/month ($481.22/year) at typical use. Adjust the watts, hours, and your rate below for your exact number.

Power (watts)

Hours per day: 8

Days per week: 7

Your state (sets the rate)

Electricity rate ($/kWh)

Cost to run a mini-split

$481/yr

Per day: $1.32
Per month: $40.10
Energy per year: 2,920 kWh

Cost = power (kW) × hours × days × your rate. Defaults are typical values — enter your appliance's actual watts (often on a label) and your real rate for a precise figure.

How much electricity does a mini-split use?

At 1,000 W for 8 hours a day, a mini-split uses about 8.0 kWh per day — roughly 243 kWh per month and 2,920 kWh per year. That's about 28% of the 863 kWh the average US home uses in a month. Energy use is the same everywhere — only the price per kWh changes your bill.

Wondering about the circuit instead? See how many amps a mini-split draws.

Cost to run a mini-split by electricity rate

Same 1,000 W appliance, 8 h/day — the bill changes with where you live.

Scenario	Rate	Per month	Per year
Cheapest states (North Dakota)	11.5¢	$28.01	$336.09
US average	16.5¢	$40.10	$481.22
Most expensive (Hawaii)	42.9¢	$104.29	$1,251.51

Find your state's rate on the electricity rates by state page, or see the appliance wattage chart for more devices.

Measure what a mini-split really costs you

The estimate above uses typical wattage and hours. This load is usually hardwired or on a 240 V circuit, so a plug-in meter won't fit it; a whole-home monitor's sensors clip onto the circuit's wires inside the panel and log its real kilowatt-hours. That means working in a live panel — hire an electrician if that isn't you.

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Whole-home energy monitor

Emporia Vue 3 Home Energy Monitor (16 circuit sensors)

Best for: Measuring hardwired and 240 V loads, or every circuit at once

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Frequently asked questions

At the US-average residential rate of 16.5¢/kWh, a mini-split drawing 1,000 watts for about 8 hours a day costs roughly $1.32 per day, $40.10 per month, and $481.22 per year. Your actual cost depends on your electricity rate and how much you use it, and the calculator on this page adjusts for both.

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How Much Does It Cost to Run a Mini-Split?

How much electricity does a mini-split use?

Cost to run a mini-split by electricity rate

Measure what a mini-split really costs you

Emporia Vue 3 Home Energy Monitor (16 circuit sensors)

Frequently asked questions