Watts / Volts / Amps / Ohms Calculator

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Ohm’s law calculator ►

Ohms Calculations

1. R = V / I. This formula calculates resistance by dividing the voltage (V) in volts by the current (I) in amperes. The resulting value is resistance (R) in ohms (Ω).
2. R = V² / P. This formula calculates resistance by squaring the voltage (V) in volts and dividing it by the power (P) in watts. The resulting value is resistance (R) in ohms (Ω).
3. R = P / I². This formula calculates resistance by dividing the power (P) in watts by the square of the current (I) in amperes. The resulting value is resistance (R) in ohms (Ω).

Keep in mind that Ohm’s law assumes that the electrical circuit is linear, meaning that the relationship between voltage, current, and resistance remains constant regardless of changes in voltage or current.

Amps Calculations

1. I = V / R. This formula calculates current by dividing the voltage (V) in volts by the resistance (R) in ohms. The resulting value is current (I) in amperes (A).
2. I = P / V. This formula calculates current by dividing the power (P) in watts by the voltage (V) in volts. The resulting value is current (I) in amperes (A).
3. I = √P / R. This formula calculates current by taking the square root of the power (P) in watts divided by the resistance (R) in ohms. The resulting value is current (I) in amperes (A).

Volts Calculations

1. V = I * R. This formula calculates voltage by multiplying the current (I) in amperes by the resistance (R) in ohms. The resulting value is voltage (V) in volts.
2. V = P / I. This formula calculates voltage by dividing the power (P) in watts by the current (I) in amperes. The resulting value is voltage (V) in volts.
3. V = √P * R. This formula calculates voltage by taking the square root of the power (P) in watts multiplied by the resistance (R) in ohms. The resulting value is voltage (V) in volts.

Watts Calculation

1. P = V * I. This formula calculates power by multiplying the voltage (V) in volts by the current (I) in amperes. The resulting value is power (P) in watts.
2. P = V² / R. This formula calculates power by squaring the voltage (V) in volts and dividing it by the resistance (R) in ohms. The resulting value is power (P) in watts.
3. P = I² * R. This formula calculates power by squaring the current (I) in amperes and multiplying it by the resistance (R) in ohms. The resulting value is power (P) in watts.

Keep in mind that these formulas are based on Ohm’s law and assume a linear relationship between voltage, current, and resistance in an electrical circuit. It’s also important to note that the units used in these formulas must be consistent (e.g., volts and amperes, or volts and ohms) in order for the calculations to be accurate.

See Also