Power Supply Wattage Calculator
Use this calculator to find the required or actual wattage for a power supply by entering the voltage and current values.
What this calculator is doing
This calculator determines the electrical power in watts using the basic formula from electrical engineering:
\[ P = V \times I \]
Where:
\( P \) = Power in watts (W)
\( V \) = Voltage in volts (V)
\( I \) = Current in amperes (A)
This calculation assumes direct current (DC) or purely resistive AC loads (power factor = 1). For AC circuits with reactive components, the real power is:
\[ P = V \times I \times \text{PF} \]
Where PF is the power factor (0 < PF ≤ 1).
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Disclaimer: These calculators are provided for informational purposes only. Always verify your designs against relevant engineering standards and consult a qualified professional. We do not take responsibility for any errors or damages resulting from the use of these calculations.