Formula: Current (Amps) = Power (Watts) ÷ Voltage (Volts)
Volts to Amps Converter
Determine how many Amperes (A) or Milliamperes (mA) your device pulls when you only know its total wattage and voltage rating.
Try Common Devices:
W
V
Required Current Draw
2.0 A
24 Watts ÷ 12 Volts = 2.0 Amperes (2,000 mA)
How to Size Your Power Adapter
If your calculation shows your device needs 2.0 Amps, choose a power supply rated for 2.0A, 2.5A, or 3.0A. The adapter will only deliver what is pulled, and having headroom prevents overheating.
Ready to verify full adapter compatibility?
Test voltage match, plug dimensions, and polarity before plugging into the wall.
Open Compatibility Checker