How many watts does a portable AC use?
A portable AC uses 700–1,400 W (about 1,100 W on average). Running 6 hours/day, that is about 6.60 kWh a day and 198.0 kWh a month — roughly $36.25 a month at the U.S. average rate of 18.31 ¢/kWh.
This is the portable AC electricity usage reference: watts, amps on a 120 V circuit, the kWh math, and links to what that usage costs in each state.
Watts, amps, and kWh for a portable AC
| Measure | Value |
|---|---|
| Rated wattage range | 700–1,400 W |
| Average draw used in our math | 1,100 W |
| Amps at 120 V | 5.8–12 A (9.2 A at the average draw) |
| kWh per hour | 1.10 kWh |
| kWh per day at 6 hours/day | 6.60 kWh |
| kWh per month | 198.0 kWh |
| Cost per month at the U.S. average (18.31 ¢/kWh) | $36.25 |
The math is kWh = watts × hours ÷ 1000 and amps = watts ÷ volts. A standard 120 V household circuit on a 15 A breaker carries about 1,800 W. For the dollars in your state, open cost to run a portable AC in Texas and switch states from there.
Portable AC electricity usage profile
| Metric | Value |
|---|---|
| kWh per hour | 1.10 kWh |
| kWh per day (typical) | 6.60 kWh |
| kWh per month (typical) | 198.0 kWh |
| kWh per year (typical) | 2409.0 kWh |
| Low runtime scenario | 3 hours/day |
| High runtime scenario | 9 hours/day |
Connect usage to cost tools
Related appliance usage pages
Source & Method
Source: U.S. Energy Information Administration (EIA) Retail Sales of Electricity. Last dataset period: July 2026. Usage calculations use fixed appliance wattage and runtime assumptions so results stay comparable across pages.
Frequently asked questions
How many watts does a portable AC use?
A portable AC uses 700–1,400 W (about 1,100 W on average). Our usage and cost math uses 1,100 watts running 6 hours/day.
How many amps does a portable AC draw?
On a 120 V circuit, 700–1,400 W works out to about 5.8–12 A; at the 1,100 W we use in the math that is 9.2 A.
How much electricity does a portable AC use per month?
About 198.0 kWh a month at 6 hours/day. Lighter use (3 hours/day) comes to roughly 99.0 kWh and heavier use (9 hours/day) roughly 297.0 kWh.
How much does it cost to run a portable AC?
About $36.25 a month at the U.S. average rate of 18.31 ¢/kWh — from roughly $25.19 in Louisiana to $95.04 in Hawaii at the same usage. The state cost-to-run pages price it at every state's rate.