Amperage To Watts Calculator
Convert amperes (amps) to watts (W) using voltage and power factor. Supports DC and AC single/three-phase systems.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Amperage to Watts Calculator
- Select Current Type: Choose DC, AC Single Phase, or AC Three Phase from the dropdown.
- Enter Voltage (V): Input the voltage in volts (e.g., 120). Must be a positive number.
- Enter Current (A): Input the amperage in amperes (e.g., 10). Must be a positive number.
- Enter Power Factor (if AC): For AC types, input a power factor between 0 and 1 (e.g., 0.9). This field is hidden for DC.
- Calculate: Click the Calculate Power button.
- Read Result: The power in watts (W) appears, along with the formula used and a step-by-step explanation.
Note: All inputs must be positive numbers. The calculator uses standard electrical formulas: P = V × I (DC), P = V × I × PF (AC single-phase), and P = √3 × V × I × PF (AC three-phase).
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Frequently Asked Questions
For DC circuits, multiply voltage by current. For AC single phase, multiply voltage, current, and power factor. For AC three phase, multiply voltage, current, power factor, and the square root of 3.
Power factor is a measure of how effectively electrical power is used, ranging from 0 to 1. It is used in AC circuits to calculate real power.
Yes, select 'AC Three Phase' and enter line-to-line voltage (assumed). The formula uses √3.