Amps is the number that decides whether a circuit, a breaker or an extension cord can safely carry a load. Watts is what most nameplates print, so converting one to the other is the first step in any wiring or breaker question.
A electric stove burner at 1,500 W draws about 12.5 amps on a 120V circuit. The formula is amps equals watts divided by volts.
Amps for your own electric stove burner
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Planning estimate. The rate box is prefilled with a regional average; the figure on your own bill is the one that matters. Power is draw while running, not while switched on.
Amps at different wattages
Nameplate wattage varies by model and setting. Find the row closest to your own unit.
| Power | Amps at 120V | Amps at 240V |
|---|---|---|
| 1,000 W | 8.3 A | 4.2 A |
| 1,500 W | 12.5 A | 6.3 A |
| 2,000 W | 16.7 A | 8.3 A |
| 2,500 W | 20.8 A | 10.4 A |
| 3,000 W | 25.0 A | 12.5 A |
What breaker size it needs
Electrical code treats a load running half an hour or more as continuous, and continuous loads must not exceed 80 percent of a breaker rating. That headroom, not the raw amp draw, is what actually sets the minimum breaker size.
| Draw at 120V | 12.5 A |
|---|---|
| Minimum breaker at 120V | 20 A |
| Wire gauge at 120V | 12 AWG |
Wire gauge figures above follow common NEC ampacity tables for copper conductors in typical residential runs and are a starting point, not a substitute for a licensed electrician, who accounts for run length, ambient temperature and conduit fill that this page cannot see.
Sharing a circuit with this appliance
A standard 15A circuit has about 12.0 amps of continuous headroom, and a 20A circuit about 16.0 amps. At 12.5 amps, this electric stove burner uses 100 percent of a 15A circuit budget on its own, which already exceeds it and needs its own dedicated circuit.
Extension cords carry a separate rating from wall wiring, usually printed on the cord itself. A cord rated below this appliance draw will overheat, and that risk grows with cord length, so always run this class of load on its own outlet rather than a cord or power strip.
How the formula works
Power in watts equals current in amps multiplied by voltage: W = A × V. Rearranged for current, A = W ÷ V, which is the calculation behind every figure on this page. It holds for any appliance once you know its wattage, so the same arithmetic applies whether the nameplate says 100 W or 10,000 W.
Nameplates sometimes print amps directly instead of watts, particularly on motors and compressors. Where that is the case, multiply amps by volts to get watts, and every running-cost and sizing figure elsewhere on this site works from there.
Comparing 120V and 240V for this load
The same wattage draws half the amps at twice the voltage, which is the entire reason 240V circuits exist for larger appliances. Halving the amps means a smaller wire can safely carry the same power, which is cheaper to run and easier to fit through a wall. It is also why the largest loads in a house, ranges, dryers, water heaters and central air, are the ones most often wired at 240V rather than 120V.
This appliance is light enough that 120V is the practical standard, and 240V wiring would be unusual and unnecessary for it.
Common mistakes when converting watts to amps
- Using the wrong voltage. North American households run nominally 120V and 240V; assuming 230V or 220V, common outside North America, changes every figure by several percent.
- Ignoring power factor. Motors, compressors and some electronics draw more apparent current than the watts-divided-by-volts formula alone predicts, because part of the current does no useful work. For a rough safety margin, adding 10 to 15 percent to a motor load calculation is common practice.
- Sizing to running amps only. A breaker survives momentary surges; a small inverter or a shared extension cord often does not.
- Forgetting other loads on the same circuit. The 80 percent continuous-load limit applies to everything on the circuit combined, not to this appliance in isolation.