To convert watts to volts, you can use the formula: Voltage (V) = Power (P) in watts divided by Current (I) in amps. This means that voltage equals power divided by current. For example, in a direct current (DC) circuit, if you have a power of 100 watts and a current of 10 amps, the voltage would be 10 volts (V = 100W / 10A). In alternating current (AC) circuits, especially single-phase, the voltage can be calculated by dividing the power by the product of the current and the power factor (V = P / (I × PF)). Understanding this relationship is crucial for electrical calculations and ensuring the proper functioning of electrical systems.