Amps = Watts ÷ Volts. This is Ohm's Law applied to AC/DC circuits.
A 1,500W heater at 120V draws 12.5 amps.
A 1,000W appliance at 240V draws only 4.17 amps.
Use this converter whenever you need to switch between measurement systems with confidence. Even familiar unit conversions carry rounding risk when done mentally — precision work requires the exact factor.
A frequent mistake is converting in the wrong direction — multiplying where the formula requires division, or vice versa. Always verify the direction of conversion: are you converting from the smaller or larger unit?
A UK architect receives a specification from a US client with dimensions in feet and inches. Converting each measurement to millimetres with precision ensures the drawings are accurate — approximate mental conversion would introduce errors that compound across multiple linked dimensions.
Amps = Watts ÷ Volts. A 600W device at 120V draws 5 amps.
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