Convert Oersteds to Amperes per Metre (Oe to A/m)
1 oersted (Oe) = 79.57747155 amperes per metre (A/m). 1 A/m = 0.01256637061 Oe. Example: 100 Oe = 100 × 79.57747155 = 7957.747155 A/m.
Also searched as oersteds to A/m, oersteds in A/m, oersteds into amperes per metre, Oe to A/m, Oe in amperes per metre, Oe into ampere per metre, oersted to ampere per metre, Oe to amperes per metre converter, oersteds to amperes per meter and how many amperes per metre in an oersted.
1 Oe = 79.57747155 A/m
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk oersted to ampere per metre converter to paste a column from Excel.
How to Convert Oersted to Ampere per Metre
- 1 Oe = 79.57747155 A/m
- 1 A/m = 0.01256637061 Oe
- Example: convert 100 Oe to A/m: 100 Oe = 100 × 79.57747155 A/m = 7957.747155 A/m
Formula
A/m = Oe × 79.57747154595
Derivation from SI units:
- 1 Oe = 1000/(4π) A/m ≈ 79.577 A/m (exact by definition)
- The SI unit of magnetic field strength H
Both units are defined exactly, so the factor is exact. Oersted definition: oersted; Ampere per Metre definition: ampere per metre.
Worked examples
- 1 Oe is 79.57747155 A/m.
1 Oe × 79.57747155 = 79.57747155 A/m - A coercivity of 100 Oe is 7957.747155 A/m.
100 Oe × 79.57747155 = 7957.747155 A/m
Oersted to Ampere per Metre conversion table
| Oersteds (Oe) | Amperes per Metre (A/m) |
|---|---|
| 0.5 Oe | 39.78873577 A/m |
| 1 Oe | 79.57747155 A/m |
| 5 Oe | 397.8873577 A/m |
| 10 Oe | 795.7747155 A/m |
| 50 Oe | 3978.873577 A/m |
| 100 Oe | 7957.747155 A/m |
| 500 Oe | 39788.73577 A/m |
| 1000 Oe | 79577.47155 A/m |
| 3000 Oe | 238732.4146 A/m |
| 5000 Oe | 397887.3577 A/m |
Where it's used
Field strengths and coercivities in oersted from CGS literature are converted to A/m, the SI unit. Multiply by 1000/(4π), about 79.577.
Oersted to other magnetic field strength units
| Conversion | 1 Oe equals |
|---|---|
| oersted to ampere per metre | 79.57747155 A/m |
| oersted to kiloampere per metre | 0.07957747155 kA/m |
| oersted to kilooersted | 0.001 kOe |
| oersted to ampere per centimetre | 0.7957747155 A/cm |
Frequently asked questions
How many A/m is 1 oersted?
1 Oe = 1000/(4π) A/m = 79.577472 A/m exactly as defined.
Why does the oersted conversion contain π?
CGS electromagnetic units are "unrationalised": the 4π that SI places in Maxwell’s equations is absorbed into the unit, so 1 Oe = 1000/(4π) A/m.
How many amperes per metre are in 1 oersted?
1 Oe = 79.57747155 A/m.
How do I convert oersteds to amperes per metre?
Multiply the value in Oe by 79.57747155. For example, 100 Oe × 79.57747155 = 7957.747155 A/m.
Is the Oe to A/m conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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, "oersted".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Oersteds to Amperes per Metre (Oe to A/m). Retrieved October 25, 2026, from https://scientificconverters.com/magnetic-field-strength/oersted-to-amperes-per-meter/
IEEE
Scientific Converters, "Convert Oersteds to Amperes per Metre (Oe to A/m)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/magnetic-field-strength/oersted-to-amperes-per-meter/