Ductless mini-split: electricity cost calculator
Quick answer: a typical ductless mini-split costs about $36/month while in use at the U.S. average electricity price (18.44¢/kWh) across a 7-month season (about $251/year). Your number depends on wattage, runtime and your state — calculate it below.
A 12,000 BTU mini-split draws 1,000–1,500 W at full output but throttles down to 300–600 W once the room reaches setpoint. The 800 W preset reflects a typical duty-cycle average across heating and cooling seasons.
6.40 kWh/day used · 195 kWh/month in use · 1364 kWh/year at 18.44¢ per kWh (7 months of use per year)
Low, typical and heavy use
Monthly cost while in use, at the U.S. average price of 18.44¢/kWh.
| Scenario | Watts | Hours/day | Per month |
|---|---|---|---|
| Light use | 500 W | 4.8 h | $13.47 |
| Typical | 800 W | 8.0 h | $35.92 |
| Heavy use | 1,500 W | 12.0 h | $101.03 |
Common questions
Why is a mini-split cheaper to run than baseboard heat?
It is a heat pump: it moves heat instead of generating it, delivering 2–4 units of heat per unit of electricity. Electric resistance heaters deliver exactly 1.
Cost in every state
Monthly cost of a typical ductless mini-split (800 W, 8h/day) at each state's average residential price, May 2026.
| State | Avg price | Per month |
|---|---|---|
| Alabama | 16.77¢ | $32.67 |
| Alaska | 28.23¢ | $54.99 |
| Arizona | 15.23¢ | $29.67 |
| Arkansas | 14.36¢ | $27.97 |
| California | 33.25¢ | $64.77 |
| Colorado | 16.16¢ | $31.48 |
| Connecticut | 27.37¢ | $53.32 |
| Delaware | 19.38¢ | $37.75 |
| District of Columbia | 25.40¢ | $49.48 |
| Florida | 15.17¢ | $29.55 |
| Georgia | 15.84¢ | $30.86 |
| Hawaii | 52.00¢ | $101.30 |
| Idaho | 12.35¢ | $24.06 |
| Illinois | 23.85¢ | $46.46 |
| Indiana | 18.15¢ | $35.36 |
| Iowa | 14.14¢ | $27.54 |
| Kansas | 15.13¢ | $29.47 |
| Kentucky | 14.98¢ | $29.18 |
| Louisiana | 14.15¢ | $27.56 |
| Maine | 28.63¢ | $55.77 |
| Maryland | 21.77¢ | $42.41 |
| Massachusetts | 28.82¢ | $56.14 |
| Michigan | 22.01¢ | $42.88 |
| Minnesota | 16.95¢ | $33.02 |
| Mississippi | 16.16¢ | $31.48 |
| Missouri | 13.68¢ | $26.65 |
| Montana | 14.67¢ | $28.58 |
| Nebraska | 13.59¢ | $26.47 |
| Nevada | 13.60¢ | $26.49 |
| New Hampshire | 27.33¢ | $53.24 |
| New Jersey | 23.27¢ | $45.33 |
| New Mexico | 14.12¢ | $27.51 |
| New York | 29.93¢ | $58.30 |
| North Carolina | 15.09¢ | $29.40 |
| North Dakota | 13.61¢ | $26.51 |
| Ohio | 19.52¢ | $38.02 |
| Oklahoma | 13.38¢ | $26.06 |
| Oregon | 16.27¢ | $31.69 |
| Pennsylvania | 21.55¢ | $41.98 |
| Rhode Island | 29.46¢ | $57.39 |
| South Carolina | 16.18¢ | $31.52 |
| South Dakota | 15.73¢ | $30.64 |
| Tennessee | 14.47¢ | $28.19 |
| Texas | 16.44¢ | $32.03 |
| Utah | 12.96¢ | $25.25 |
| Vermont | 24.89¢ | $48.49 |
| Virginia | 17.61¢ | $34.30 |
| Washington | 14.95¢ | $29.12 |
| West Virginia | 16.80¢ | $32.73 |
| Wisconsin | 19.74¢ | $38.45 |
| Wyoming | 14.80¢ | $28.83 |
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Methodology & sources
Cost = watts ÷ 1,000 × hours × price per kWh. Electricity prices are average residential prices by state from the EIA Electric Power Monthly, Table 5.6.A (May 2026). EIA averages include delivery charges and taxes but are not any specific utility tariff — for an exact figure, use the rate from your own bill. Wattage presets reflect common product ranges; check your appliance's nameplate or a plug-in power meter for its true draw.
Last verified: July 30, 2026. Prices refresh automatically each month when EIA publishes new data.