Air conditioner (central) vs Portable AC: which costs more to run? (2026)
Baseline uses U.S. average $0.180/kWh, typical wattage, and typical hours/day from our catalog. At that rate: Air conditioner (central) ~$48.54/mo (270.0 kWh/mo) · Portable AC ~$51.78/mo (288.0 kWh/mo).
Use the country selector in the tool below for your tariff and currency (defaults follow your locale, same as our appliance calculators). See methodology for sources.
Estimates below use the rate you pick (defaults match your locale when possible). The summary paragraph above stays at U.S. average for SEO; see methodology for sources.
$0.180/kWh
Higher cost: Portable AC · +7% ($3.24/mo vs Air conditioner (central))
Air conditioner (central)
Lower cost- Typical watts
- 1500 W
- Hours/day
- 6
- Monthly est.
- $48.54
- kWh/mo
- 270.0
Portable AC
Higher cost- Typical watts
- 1200 W
- Hours/day
- 8
- Monthly est.
- $51.78
- kWh/mo
- 288.0
Portable AC is estimated to cost more per month at typical use.
Compare by U.S. state
State pages use local utility averages (TYPE7). Open a state for either appliance to fine-tune hours and watts.