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Ohm's Law Converter

Use this tool to calculate watts, volts, amps, or ohms based on given electrical values. The equations apply to DC circuits and purely resistive loads; AC phase and reactive impedance are not modeled.

W
V
A
Ω

How to Use:

  • Enter values in at least two fields
  • Click "Calculate" to compute results
  • Click "Reset" to clear all fields

Electrical Formulas:

  • Power (W) = Voltage (V) × Current (A), W = V × A
  • Voltage (V) = Current (A) × Resistance (Ω), V = A × Ω
  • Current (A) = Voltage (V) / Resistance (Ω), A = V / Ω
  • Resistance (Ω) = Voltage (V) / Current (A), Ω = V / A

This tool helps with:

  • Determining missing electrical values using Ohm’s Law and power equations.

  • Converting between power (W), voltage (V), current (A), and resistance (Ω).

  • Simplifying circuit calculations for electrical and RF applications.

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Related Glossary Entries

Ohm's Law
Watt (W)
Voltage (V)
Ampere (A)
Resistance (Ω)
Impedance (Z)
Last updated on September 22, 2026
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article
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