Magnet Power Calculator

Magnet Power Calculator calculator can be used to calculate the magnetic field strength (B) at a given distance from a magnet based on its remanence (Br) and dimensions.

Input Parameters

Calculation Results

Calculation Formula

B = Br * (W * H) / (2 * π * d²)

Where:
B = Magnetic field strength at distance d (Gauss)
Br = Remanence of the magnet (Gauss)
W = Width of the magnet (cm)
H = Height of the magnet (cm)
d = Distance from the magnet center (cm)
π = Pi (approximately 3.14159)

Magnet Power Calculator Calculator Usage Guide

Learn how to use the Magnet Power Calculator calculator and its working principles

How to Use the Magnet Power Calculator

  1. Enter the remanence (Br) of your magnet in Gauss. This is the magnetic strength of the magnet when it is fresh out of the factory.
  2. Input the width (W) and height (H) of your magnet in centimeters. These dimensions affect the magnetic field strength.
  3. Specify the distance (d) from the center of the magnet where you want to measure the magnetic field strength, in centimeters.
  4. Click the "Calculate" button to compute the magnetic field strength (B) at the specified distance.
  5. Use the "Reset" button to clear all input fields and start over if needed.

Understanding the Formula

The calculator uses the following formula to estimate the magnetic field strength:

B = Br * (W * H) / (2 * π * d²)

This formula assumes a simplified model where the magnet behaves like a bar magnet with uniform field distribution. The actual field strength may vary depending on the magnet shape, material, and temperature.

Applications

This calculator is useful for:

  • Designing magnetic circuits and assemblies
  • Estimating the magnetic field strength for specific applications
  • Comparing different magnets for a particular use case
  • Understanding how distance affects magnetic field strength