space heater · 2200W
18.33A
North America 120 V · 20 A
space heater, 2200 W — 18.33 A on a 120 V / 20 A circuit
2200 W divided by 120 V is 18.33 A. This circuit allows 16 A continuously, so 0 of them can run together.
Too much for this circuit alone
Plug it straight into the wall
- Power draw
- 2200 W
- Voltage
- 120 V
- Breaker
- 20 A
- Current that flows
- 18.33 A
- Limit for continuous use
- 16 A
- How many fit at once
- 0
- Wire it needs
- AWG 12
- Two hours a day, per month
- 132 kWh
Continuous loads get eight tenths
A breaker does not trip the instant you reach its rating — it holds for a long while first, and the wire warms up in the meantime. So a load running more than three hours is planned to eight tenths of the breaker. On a 16 A breaker that is 12.8 A.
Nearby cells
Same appliance, other circuits
Same circuit, other appliances
air purifier
0.38A · 42
laptop
0.54A · 29
fan
0.67A · 24
TV
1A · 16
fridge
1.25A · 12
heated blanket
1.67A · 9
game console
1.83A · 8
desktop PC
2.92A · 5
washing machine
4.17A · 3
toaster
7.5A · 2
rice cooker
9.17A · 1
microwave
10A · 1
coffee machine
11.67A · 1
iron
12.5A · 1
hair dryer
13.33A · 1
vacuum cleaner
14.17A · 1
air conditioner
15A · 1
electric kettle
16.67A · 0
space heater
18.33A · 0
induction hob
25A · 0
How to read this
- Current is the power draw divided by the voltage — a different country gives a different answer.
- The number that fits at once is eight tenths of the breaker divided by that current.
- A power strip stops at 15 A. A bigger breaker does not help; the strip is the ceiling.
- The wire gauge is taken straight from the wire pages.
Frequently asked questions
Q. How many amps does a space heater draw?
2200 W over 120 V is 18.33 A.
Q. How many fit on this circuit?
0. Eight tenths of the 20 A breaker is 16 A, divided by 18.33 A.
Q. Is a power strip fine?
No. It passes 15 A, so plug it straight into the wall.
Q. What wire does it need?
AWG 12 carries this current comfortably. Two hours a day comes to 132 kWh a month.