Understanding the relationship between watts, volts, amps, and ohms is essential for anyone working with electrical circuits. These four fundamental units are interconnected through Ohm's Law and the power equation. Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R): V = I × R. Similarly, electrical power (P), measured in watts, is calculated by multiplying voltage by current: P = V × I. By knowing any two of these values, you can determine the others using these formulas. For instance, to find the current, divide the voltage by the resistance: I = V / R. To assist with these calculations, online tools like the Watts/Volts/Amps/Ohms Calculator are available, allowing users to input known values and compute the unknown parameters efficiently.