ETS-Lindgren 6404 Helmholtz Coil - Manual (Page 23)

Conversion Table for Magnetic Units | 23
Appendix B: Conversion Table for Magnetic Units
To Convert From
Unit
System: SI (MKS) CGS
Magnetic
Quantity: B H B H B
Units tesla amp-
turn/m gauss oersted gamma
To
tesla 1 4 π x 10 -7† 10 -4 10 -4† 10 -9
amp-
turn/m 7.96 x 10 5‡ 1 79.57747 ‡ 79.57747 7.96 x 10 -4‡
gauss 10 4 4 π x 10 -3† 1 1 † 10 -5
oersted 10 4‡ 4 π x 10 -3 1 ‡ 1 10 -5‡
gamma 10 9 4 π x 10 2† 10 5 10 5† 1
Multiply by above value
† Assumes μ = 1; if μ ≠1, multiply by value of μ to convert from H to B.
‡ Assumes μ = 1; if μ ≠1, divide by value of μ to convert from B to H.
1 tesla ≡ 1 weber/m 2 .
For example,
1 tesla = 10 4 gauss.
1 gauss = 79.6 ampere-turns/m in an unloaded coil ( μ = 1).
If μ = 2.50, 1 tesla = 7.96 x 10 5 / 2.50 = 3.18 x 10 5 amp-turns/m.