Magnetic Field Strength Converter
Magnetic field strength, written H, describes the magnetising field produced by electric currents. The SI unit is the ampere per metre (A/m); the CGS unit, the oersted, is about 79.58 A/m.
1 Ampere/Meter = 0.01256637061 Oersted
How to convert Ampere/Meter to Oersted
One Ampere/Meter equals 0.01256637061 Oersted, so multiply any value in A/m by 0.01256637061 to get Oe. To convert back, divide by 0.01256637061 — or multiply by 79.57747155.
Oe = A/m × 0.01256637061
Example: 25 A/m × 0.01256637061 = 0.3141592654 Oe.
Ampere/Meter to Oersted table
| Ampere/Meter (A/m) | Oersted (Oe) |
|---|---|
| 1 | 0.01256637061 |
| 2 | 0.02513274123 |
| 3 | 0.03769911184 |
| 4 | 0.05026548246 |
| 5 | 0.06283185307 |
| 10 | 0.1256637061 |
| 15 | 0.1884955592 |
| 20 | 0.2513274123 |
| 25 | 0.3141592654 |
| 50 | 0.6283185307 |
| 75 | 0.9424777961 |
| 100 | 1.256637061 |
| 250 | 3.141592654 |
| 500 | 6.283185307 |
| 1,000 | 12.56637061 |
Oersted to Ampere/Meter table
| Oersted (Oe) | Ampere/Meter (A/m) |
|---|---|
| 1 | 79.57747155 |
| 2 | 159.1549431 |
| 3 | 238.7324146 |
| 4 | 318.3098862 |
| 5 | 397.8873577 |
| 10 | 795.7747155 |
| 15 | 1,193.662073 |
| 20 | 1,591.549431 |
| 25 | 1,989.436789 |
| 50 | 3,978.873577 |
| 75 | 5,968.310366 |
| 100 | 7,957.747155 |
| 250 | 19,894.36789 |
| 500 | 39,788.73577 |
| 1,000 | 79,577.47155 |
Magnetic Field Strength units at a glance
All 9 units this converter supports, each expressed in Ampere/Meter (A/m) and the other way round.
| Unit | Symbol | 1 unit in A/m | 1 A/m in unit |
|---|---|---|---|
| Ampere/Meter | A/m | 1 | 1 |
| Kiloampere/Meter | kA/m | 1,000 | 0.001 |
| Milliampere/Meter | mA/m | 0.001 | 1,000 |
| Oersted | Oe | 79.57747155 | 0.01256637061 |
| Millioersted | mOe | 0.07957747155 | 12.56637061 |
| KiloOersted | kOe | 79,577.47155 | 0.00001256637061 |
| Ampere-Turn/Meter | At/m | 1 | 1 |
| Ampere-Turn/Inch | At/in | 39.37007874 | 0.0254 |
| Ampere-Turn/Centimeter | At/cm | 100 | 0.01 |
Where magnetic field strength conversions are used
Testing magnetic materials, electromagnet design, and specifying magnetic shielding.
Frequently asked questions
What is 1 Ampere/Meter in Oersted?
1 Ampere/Meter (A/m) is 0.01256637061 Oersted (Oe).
What is 1 Oersted in Ampere/Meter?
1 Oersted (Oe) is 79.57747155 Ampere/Meter (A/m).
How do I convert Ampere/Meter to Oersted?
Multiply the value in Ampere/Meter by 0.01256637061. For example, 5 A/m × 0.01256637061 = 0.06283185307 Oe. To go the other way, divide by 0.01256637061.
How many units does the magnetic field strength converter support?
It converts between 9 units: Ampere/Meter, Kiloampere/Meter, Milliampere/Meter, Oersted, Millioersted, KiloOersted, Ampere-Turn/Meter, Ampere-Turn/Inch, Ampere-Turn/Centimeter.
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Figures on this page are calculated with the same conversion factors as the converter above and shown to up to 10 significant figures. See our disclaimer before relying on a result in a professional or safety-critical context.