Ohm’s Law Calculator

Solve electrical circuits using Ohm’s law circle: calculate any two values from Voltage (V), Current (I), Resistance (R), and Power (P).

Calculator Inputs

V
Potential difference.
A
Electric current.

Calculated Results

Circuit Resistance (R)
12.00 Ohms (Ω)
Electrical Power (P) 1,200 Watts (1.20 kW)
Supply Voltage (V) 120.00 Volts
Current Flow (I) 10.00 Amperes
Values calculate live as you adjust inputs.

About Ohm’s Law Calculator

What is the Ohm’s Law Calculator?

The Ohm’s Law Calculator is an enterprise-grade calculation tool designed to compute exact mathematical, financial, or scientific parameters based on peer-reviewed formulas.

How to Use This Calculator

  1. Enter your primary input variables in the input fields above.
  2. Select your desired measurement units or options.
  3. Click Calculate to instantly view live outputs, step-by-step mathematical breakdowns, and formulas.

Mathematical Formula & Derivation

Our calculation engine implements verified equations approved by academic literature, WHO guidelines, IRS tax codes, or BIPM metric standards.

Frequently Asked Questions

Q: Is this calculator free to use?
A: Yes! OmniCalc Ultra provides 100% free, private, client-side calculations with zero tracking.

Scientific & Academic References

  • International System of Units (SI) Standards
  • NIST Engineering & Mathematical Reference Handbooks

What is Ohm’s Law Calculator?

Applies Ohm’s fundamental law (V = I × R) and Joule’s law (P = V × I) to calculate resistance, power dissipation, voltage drop, and amperage.

How to Use This Calculator

  1. Enter voltage and current.
  2. Instantly review calculated resistance in Ohms and power dissipation in Watts.

The Mathematical Formula & Variables

R = V / I; Power = V * I

Step-by-Step Worked Example

Scenario: 120V supply drawing 10A current.

  1. Resistance = 120 / 10 = 12.00 Ohms (Ω).
  2. Power = 120 * 10 = 1,200 Watts (1.20 kW).

Result: R = 12 Ω | P = 1,200 W

Frequently Asked Questions

What are the four fundamental electrical parameters?

Voltage (V in Volts), Current (I in Amps), Resistance (R in Ohms), and Power (P in Watts).