Calculate the magnetic field generated around a long straight current-carrying wire at a given distance. This calculator uses Ampère's law to determine field strength at any radial distance.
Enter your values below
Current flowing through the wire
Radial distance from the center of the wire
How this calculator works
The magnetic field equals the permeability of free space times current divided by the product of 2π and the radial distance from the wire.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
