Power Adapter Wattage Calculator
Calculate the total power in Watts (W) produced by any power supply brick or required by your electronic gadget, estimate 24/7 running costs, and calculate continuous safety margins.
Crucial Rule: Wattage Alone Does NOT Guarantee Compatibility
A 24V · 1A adapter and a 12V · 2A adapter are both exactly 24 Watts. However, plugging a 24V adapter into a 12V device will immediately destroy it! Always match Voltage (V), Polarity, and Connector Dimensions first.
P = V × I
Power in Watts equals electrical voltage potential multiplied by current volume flowing.
1,000 mA = 1 A
Small electronics list current in milliamps. Always divide by 1,000 to find full Amperes before multiplying.
+20% Is Ideal
Using an adapter with 20% to 25% higher wattage capacity prevents thermal throttling and extends power supply lifespan.
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