Watts to Ohms Calculator

This calculator helps you convert power (watts) and voltage to resistance (ohms) using the formula: R = (V²) / P

Input Parameters

Calculation Results

Calculation Results

Resistance (Ohms): -

Current (Amperes): -

Calculation Formula

R = V² / P

Where:
R = Resistance (Ohms)
V = Voltage (Volts)
P = Power (Watts)

Watts to Ohms Calculator Usage Guide

Learn how to use the Watts to Ohms Calculator and understand the relationship between power, voltage, and resistance

How to Use This Calculator

  1. Enter the power in watts (W) of your device or component.
  2. Enter the voltage (V) at which the device operates.
  3. Click the "Calculate" button to compute the resistance in ohms (Ω).
  4. The calculator will also display the current flowing through the device.

Understanding the Formula

This calculator uses the relationship between power, voltage, and resistance:

R = V² / P

Where:

  • R is the resistance in ohms (Ω)
  • V is the voltage in volts (V)
  • P is the power in watts (W)

Practical Applications

This calculator is useful for:

  • Designing electrical circuits
  • Calculating the resistance needed for a specific power and voltage
  • Understanding the electrical properties of components
  • Ensuring components operate within their specifications

Example

If you have a device that uses 60 watts of power at 120 volts:

R = (120 V)² / 60 W = 14400 / 60 = 240 Ω

The device would require a resistance of 240 ohms to operate safely at 120 volts with a power consumption of 60 watts.