Magnetic flux density converter (B field)
Convert between T, µT, nT, pT, dBpT and dBµA/m magnetic flux density, using the free-space B = µ0·H relation.
Formulas
B = µ₀ · H (free space)
dBpT ≈ dBµA/m + 1.984
1 T = 10⁶ µT = 10⁹ nT = 10¹² pT
Engineering background
Magnetic flux density B (Tesla) relates to field strength H (A/m) via µ₀ = 4π·10⁻⁷. EMC tests commonly convert between dBpT and dBµA/m.
Key benefits
01
One-click conversion across T, µT, nT, pT, dBpT and dBµA/m.
02
Bakes in the free-space B = µ₀·H relation for direct dBpT to dBµA/m conversion.
03
Suited to H-field probe measurements and radiated-susceptibility field calibration.
How to use
- 1 Enter a known flux density or field-strength value in any unit field.
- 2 Other units update in real time.
- 3 Copy the link to share the result.
Use cases
- › Near-field H-field probe measurement conversion.
- › Radiated-susceptibility (RS) magnetic-field calibration.
- › Unifying dBpT and dBµA/m units in EMC reports.
FAQ
What is the offset between dBpT and dBµA/m?
Approximately 1.984 dB in free space, derived from 20·log₁₀(µ₀·10⁶).
What is the difference between B and H?
H is magnetic field strength (A/m); B is magnetic flux density (T). In free space B = µ₀·H.