Convert Kilogauss to Millitesla (kG to mT)

Formula

mT = kG × 100

Derivation from SI units:

• 1 kG = 1000 G = 0.1 T
• 1 mT = 10⁻³ T
• 1 kG = 0.1 T ÷ 0.001 T per mT = 100 mT

Both units are defined exactly, so the factor is exact. Kilogauss definition: kilogauss; Millitesla definition: millitesla.

Worked examples

1. A reading of 10 kG converts to 1000 mT.
   10 kG × 100 = 1000 mT
2. A value of 14 kG is 1400 mT.
   14 kG × 100 = 1400 mT

Where it's used

Kilogauss are used for remanence of permanent magnets (for example 12–14 kG for NdFeB), while millitesla appear in fridge and small permanent magnets (about 5–100 mT). Both measure magnetic flux density (B field), so the conversion is a fixed factor.

Kilogauss to other magnetic flux density units

Frequently asked questions

Sources

• 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, "gauss".
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .

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