About This Magnetic Permeability Converter
Our Magnetic Permeability Converter provides precise conversions between different units used to measure absolute magnetic permeability (μ). Magnetic permeability describes how easily a material allows magnetic field lines to pass through it and is fundamental in electromagnetic theory, core material selection, and transformer or inductor design.
The SI unit of permeability is Henry per meter (H/m). All conversions are referenced to this base. The permeability of free space (μ₀ = 4π × 10⁻⁷ H/m) serves as the reference point for relative permeability in electromagnetic engineering. This tool is essential for electrical engineers, physicists, and researchers working with magnetic materials and transformer core selection.
Key Features
- Corrected μ₀ Factor: Conversions involving the permeability of free space use the exact CODATA constant 4π × 10⁻⁷ H/m for maximum precision.
- Comprehensive Units: Convert between H/m, mH/m, μH/m, nH/m, H/cm, H/in, and magnetic-circuit units (Mx/At).
- Scientific Precision: Handles both microscopic and macroscopic values with automatic scientific notation for extreme-range results.
- Real-time Conversion: See results instantly as you type or change units — ideal for core material characterisation on the go.