What happens if resistance increases?

According to the law, if the voltage stays the same, an increase in resistance will always cause the current to decrease.

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Ohm's Law Calculator – Electrical Circuit Service | CalcTools

Calculate Voltage, Current, and Resistance. Essential service for students and electricians.

Ohm's Law is the most fundamental principle in electricity, describing how pressure (Voltage), flow (Current), and restriction (Resistance) interact. Whether you are troubleshooting a household appliance or designing an LED circuit for a project, understanding these values is critical for both function and safety. Our Ohm's Law service allows you to input any two variables to solve for the third, providing instant clarity for any electrical circuit.

Voltage (V) (V)

Current (A) (A)

Resistance (Ω) (Ω)

Power (W) (W)

Enter any two values to solve.

Circuit Analysis

12.00 V

12.00V, 2.00A, 6.00Ω, 24.00W

Voltage (V)12.00

Current (I)2.00

Resistance (R)6.00

Power (P)24.00

How it Works

The tool applies the universal algebraic rearrangements of V=IR. It also calculates total power consumption (Watts) as a secondary output, giving you a complete electrical snapshot of your circuit.

Calculation Formula

V = I × R | P = V × I

Calculation Examples

1. **LED**: 12V through 470Ω = **~25mA current**.

Why use this tool in your daily life?

Safety through understanding. This service prevents electrical overloads and ensures your components are correctly sized for their power source, making it an essential utility for anyone working with modern electronics.