Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Oersted to Amperes per metre
Convert Oe to A/m instantly, then review the formula, assumptions, and rounding guidance.
Magnetic unitsInstant result
Decimals
Formula result = input × 79.57747154594767 ÷ 1. 1 Oe = 79.5775 A/m
Common examples
One value, several units
Amperes per metre79.5775 A/m
Kiloamperes per metre0.0796 kA/m
Conversion table
| Oe | A/m |
|---|---|
| 1 Oe | 79.5775 A/m |
| 2 Oe | 159.1549 A/m |
| 5 Oe | 397.8874 A/m |
| 10 Oe | 795.7747 A/m |
| 25 Oe | 1,989.4368 A/m |
| 50 Oe | 3,978.8736 A/m |
| 100 Oe | 7,957.7472 A/m |
Conversion chart
1 Oe79.5775 A/m
5 Oe397.8874 A/m
10 Oe795.7747 A/m
25 Oe1,989.4368 A/m
50 Oe3,978.8736 A/m
Worked example
1 oersted is approximately 79.5775 A/m in free space.
Unit definition
Oersted (Oe) One oersted equals 79.5774715459 ampere per metre.
Unit history
Oersted is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert Oe to ampere per metre.
3. Convert the base value to A/m and apply your display precision.
Understand the result before using it
Oersted to Amperes per metre converts a value measured in Oersted (Oe) into the equivalent value in Amperes per metre (A/m). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 79.57747154594767 ÷ 1
Assumptions
- Oersted and Amperes per metre represent the same magnetic field strength quantity.
- The input is expressed in Oe; the output is expressed in A/m.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 Oe = 79.5774715459 A/m. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a Oe measurement in a document that expects A/m.
- Compare a oersted value with a value reported in amperes per metre.
- Check the Oe-to-A/m arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse Oe with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Oersted to Amperes per metre?
result = input × 79.57747154594767 ÷ 1 Using the displayed relationship, 1 Oe equals 79.5774715459 A/m.
How many Amperes per metre are in one Oersted?
One Oersted is 79.5774715459 Amperes per metre. The displayed digits may be rounded.
Can I reverse the Oe to A/m conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts A/m back to Oe.
Is the Oersted to Amperes per metre result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.