Convert Nanotesla to Kilogauss (nT to kG)

Formula

kG = nT ÷ 100000000

Derivation from SI units:

• 1 nT = 10⁻⁹ T (also called a gamma in geophysics)
• 1 kG = 1000 G = 0.1 T
• 1 nT = 1 × 10⁻⁹ T ÷ 0.1 T per kG = 1 × 10⁻⁸ kG

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

Worked examples

1. A reading of 50 nT converts to 5 × 10⁻⁷ kG.
   50 nT × 1 × 10⁻⁸ = 5 × 10⁻⁷ kG
2. A value of 1000 nT is 0.00001 kG.
   1000 nT × 1 × 10⁻⁸ = 0.00001 kG

Where it's used

Nanotesla are used for geomagnetic surveys and magnetometers, while kilogauss appear in remanence of permanent magnets (for example 12–14 kG for NdFeB). Both measure magnetic flux density (B field), so the conversion is a fixed factor.

Nanotesla to other magnetic flux density 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, "gauss".

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