Magnetic Field Strength Converter
How to Use the Magnetic Field Strength Converter
Enter a magnetic field strength value, choose the source unit and select the target unit to convert between A/m and oersted.
Practical Example
1 oersted is approximately 79.5775 A/m in free space.
Factors That Affect Magnetic Field Strength
Measured field strength can vary with current, coil geometry, distance, magnetic materials and surrounding fields. The converter changes units only.
Frequently Asked Questions
What is A/m?
Ampere per meter is the SI unit of magnetic field strength H.
What is an oersted?
Oersted is a CGS unit of magnetic field strength.
Is field strength the same as flux density?
No. H and magnetic flux density B are related but distinct quantities.
Understanding Magnetic Field Strength Units
Magnetic field strength H is commonly expressed in amperes per metre or oersted. Converting these units is useful when comparing SI and older electromagnetic specifications.
Field strength is not the same as magnetic flux density B; the relationship between them depends on material permeability. Use the correct physical quantity before converting, especially when working with magnetic materials rather than free space.
Technical Context and Conversion Notes
Magnetic field strength H is measured in A/m and differs from magnetic flux density B. Their relationship depends on permeability, so A/m and tesla are not direct interchangeable units.