How do I convert gauss to tesla?

Use the flux density group and convert 1 G = 1×10⁻⁴ T. Enter gauss and read the equivalent tesla and milli-tesla.

How do I convert oersted to A/m?

For magnetic field strength, 1 Oe ≈ 79.5774715 A/m in vacuum. Multiply your oersted value by this factor.

What’s the difference between B and H?

B (tesla/gauss) is magnetic flux density; H (A/m, oersted) is magnetic field strength. They are related by B = μH, and this tool separates the two families of units.

Magnetism Unit Conversions – tesla, gauss, oersted, A/m, weber

Magnetism Unit Conversions

Convert magnetism quantities across SI and CGS in one tool. Pick the quantity (B, H, or Φ) and we show only the compatible units – this avoids mixing tesla with oersted by mistake.

Quantity

Value

Try 1000 G → 0.1 T

From unit

To unit

Converted 1000 G → 0.1 T

Result

0.100000

Quick reference

Quantity	SI unit	CGS unit	Relation
B – flux density	1 T	10,000 G	1 T = 10⁴ G
H – field strength	1 A/m	1 Oe	1 Oe ≈ 79.577 A/m
Φ – flux	1 Wb	10⁸ Mx	1 Wb = 10⁸ maxwell

Why separate B, H, and Φ?

Magnetic units are tricky because SI and CGS don’t map 1:1 across all quantities, and because in practice magnet vendors often quote gauss (B) while physics notes use oersted (H). This tool keeps them in separate groups so you don’t accidentally convert B to H without the material permeability.

Formulas used

Flux density (B): 1 T = 10,000 G, 1 mT = 0.001 T = 10 G

Field strength (H): 1 Oe = 1000/(4π) A/m ≈ 79.5774715 A/m

Flux (Φ): 1 Wb = 10⁸ Mx

Note on B–H conversion

B and H are related by \( B = \mu H \), where μ is the permeability of the medium. Because μ depends on the material (air, iron, ferrite…) we do not auto-convert B ←→ H here; we only convert within the same quantity group.