Convert Milliwebers to Maxwells (mWb to Mx)

Formula

Mx = mWb × 100000

Derivation from SI units:

• 1 mWb = 10⁻³ Wb
• 1 Mx = 1 G·cm² = 10⁻⁸ Wb (exact)
• 1 mWb = 0.001 Wb ÷ 1 × 10⁻⁸ Wb per Mx = 100000 Mx

Both units are defined exactly, so the factor is exact. Milliweber definition: milliweber; Maxwell definition: maxwell.

Worked examples

1. A reading of 1 mWb converts to 100000 Mx.
   1 mWb × 100000 = 100000 Mx
2. A value of 10 mWb is 1000000 Mx.
   10 mWb × 100000 = 1000000 Mx

Where it's used

Milliwebers are used for transformer core flux per turn, while maxwells appear in older transformer and magnet design formulas. Both measure magnetic flux, so the conversion is a fixed factor.

Milliweber to other magnetic flux units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "maxwell".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.