Magnetic field strength converter (H field)
Convert between A/m, mA/m, µA/m, dBA/m, dBmA/m and dBµA/m magnetic field strength units.
Formulas
dBµA/m = 20·log₁₀(A/m) + 120
dBA/m = dBµA/m − 120
1 A/m = 10³ mA/m = 10⁶ µA/m
Engineering background
Magnetic field strength H uses A/m as the base unit; the dB form references 1 µA/m. Common in radiated-susceptibility field calibration and H-field probe measurements.
Key benefits
01
One-click conversion across A/m, mA/m, µA/m, dBA/m, dBmA/m and dBµA/m.
02
Matches RS test field-strength units for direct comparison.
03
Linked conversion avoids magnitude errors.
How to use
- 1 Enter a known field-strength value in any unit field.
- 2 Other units update in real time.
- 3 Copy the link to share the result.
Use cases
- › Radiated-susceptibility (RS) field calibration.
- › Near-field H-field probe measurements.
- › Unit unification in EMC reports.
FAQ
What is the offset between dBµA/m and dBA/m?
120 dB. 1 A/m = 10⁶ µA/m.
How do H and B fields relate?
In free space B = µ₀·H; use the B-field converter for linked conversion.