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.
Try 1000 G → 0.1 T
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.
Formula (LaTeX) + variables + units
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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
- No variables provided in audit spec.
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Last code update: 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.