Magnetic Field Strength Converter

Convert between all magnetic field strength units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: ampere per metre (A/m)

Conversion Formula

About Magnetic Field Strength Units

Common Magnetic Field Strength Conversions

• 1 Oe = 1000/(4π) A/m ≈ 79.577 A/m (exact; CGS-Gaussian definition)
• 1 kOe = 1000/(4π) kA/m ≈ 79.577 kA/m (permanent magnet coercivity scale)
• 1 A/cm = 100 A/m (metric practical unit used in ferrite datasheets)
• 1 A/in ≈ 39.370 A/m (US coil winding specification)
• 1 A/ft ≈ 3.2808 A/m (US engineering unit; 1 ft = 0.3048 m exactly)
• Earth's geomagnetic field H ≈ 40–60 A/m (≈ 0.5–0.75 Oe at mid-latitudes)
• NdFeB magnet coercivity H_c ≈ 900–2000 kA/m (≈ 11–25 kOe)
• MRI 3 T bore: free-space H = B/μ₀ = 3/(4π×10^-7) ≈ 2387 kA/m

Direct Converters