Conversion method
Magnetic field strength H (A/m) differs from flux density B (tesla). Converting between them needs the medium’s magnetic permeability.
Oe = x × 0.012566370614359171
10 A/m = 0.125664 Oe.
| A/m | Oe |
|---|---|
| 1 | 0.012566 |
| 5 | 0.062832 |
| 10 | 0.125664 |
| 25 | 0.314159 |
| 50 | 0.628319 |
| 100 | 1.256637 |
Unit definitions and sources
Magnetic field strength H (A/m) differs from flux density B (tesla). Converting between them needs the medium’s magnetic permeability.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Ampere per meter (A/m); si | Common units | Ampere per meter: base (a-m) = value × 1. Common use: Magnetic Field Strength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Oersted (Oe); si | Common units | Oersted: base (a-m) = value × 79.57747154594767. Common use: Magnetic Field Strength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kiloampere per meter (kA/m); si | Specialist units | Kiloampere per meter: base (a-m) = value × 1000. Common use: Magnetic Field Strength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Ampere per centimeter (A/cm); si | Specialist units | Ampere per centimeter: base (a-m) = value × 100. Common use: Magnetic Field Strength. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of magnetic field strength conversions
All 4 magnetic field strength units convert through Ampere per meter (A/m). 4 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.