The value of Mu naught is equal to μ0 = 4π π × 10-7 H/m. The approximated value of Mu naught is equal to 12.57 ×10-7 H/m. Mu naught is also the proportionality constant between the free space permeability and the magnetic field strength in any of the mediums.

The mu naught value is 4π × 10-7 H/m. But what is mu naught? Mu naught or µ0 is the permeability constant. It is synonymous with the magnetic constant or the permeability of free space. So, the mu naught value measures the amount of resistance offered against the magnetic field formed in a vacuum.

Mu naught is value is μ₀ = 4π × 10⁻⁷ H/m. H/m, or Henry per meter, is the unit of measurement for mu naught. To express magnetic permeability in a vacuum, we utilized the Greek alphabet, which is mu (μ). The sign is an acronym for the unit of measurement, microns or micrometers.