Watts to Amps Calculator
Convert electrical power in watts to current in amps for a DC or single-phase AC circuit by dividing power by voltage (I = P / V).
Formula: I = P / V
About Watts to Amps Calculator
Watts to Amps Calculator is a free online calculator that gives you an instant, accurate result as you type. Convert electrical power in watts to current in amps for a DC or single-phase AC circuit by dividing power by voltage (I = P / V).
The calculation uses the standard formula I = P / V and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
A 1,500 W space heater on a 120 V circuit draws 12.5 A — close to the limit of a standard 15 A household breaker.
Frequently Asked Questions
Is Watts to Amps Calculator free to use?
Yes. Watts to Amps Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (I = P / V) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
Related Tools
Rhombus Calculator
Calculate the area, side length, and perimeter of a rhombus from its two diagonals.
Kite Calculator
Calculate the area of a kite from its two diagonals, plus its perimeter from the two pairs of sides.
Octagon Calculator
Calculate the area and perimeter of a regular octagon from its side length.
Heptagon Calculator
Calculate the area and perimeter of a regular heptagon (7-sided polygon) from its side length.
Nonagon Calculator
Calculate the area and perimeter of a regular nonagon (9-sided polygon) from its side length.
Decagon Calculator
Calculate the area and perimeter of a regular decagon (10-sided polygon) from its side length.