Enter the current (amps) and the radius (m) into the Calculator. The calculator will evaluate the Magnetic Strength. 

Magnetic Strength Formula

MS = I /2*pi*r


  • MS is the Magnetic Strength (amps/meter)
  • I is the current (amps)
  • r is the radius (m)

To calculate Magnetic Strength, divide the current by 2, multiply by pi, then multiply again by the radius.

How to Calculate Magnetic Strength?

The following steps outline how to calculate the Magnetic Strength.

  • First, determine the current (amps). 
  • Next, determine the radius (m). 
  • Next, gather the formula from above = MS = I /2*p*r.
  • Finally, calculate the Magnetic Strength.
  • After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

current (amps) = 4

radius (m) = 23