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Ohms Law Calculator

Calculate voltage, current, resistance, and power with our free Ohms Law calculator.

Engine Version: 1.0
Reviewed: October 6, 2026
Reviewed by: Utilivox Technical Team
โœ“ Verified Algorithm
Calculator Electrical

Ohm's Law Calculator

Calculate voltage, current, or resistance instantly using Ohm's Law. Enter any two known values to find the missing electrical value.

Engine Version: 1.0
Reviewed: October 6, 2026
Reviewed by: Utilivox Engineering Team
โœ“ Verified Algorithm

Input Parameters

Client-Side Safe
Leave empty if you want to calculate voltage.
Leave empty if you want to calculate current.
Leave empty if you want to calculate resistance.
Please enter exactly two valid values. The third value must be left empty.

Result

โ— Live Engine
Enter any two values to calculate the missing voltage, current, or resistance.
Calculated Value
2.00 A
Voltage 12.00 V
Current 2.00 A
Resistance 6.00 ฮฉ
Formula: I = V รท R

Ohms law describes the relationship between voltage, current, and resistance.

Mathematical Formula

V = I * R

Step-by-Step Worked Example

Given I = 2A and R = 10 Ohm, V = 20V.