Magnetic Field Strength Converter

12 units

Convert between different units of magnetic field strength including ampere per meter, oersted, and related electromagnetic field units for magnetic circuit analysis.

Precision Control
Adjust decimal precision for your conversion needs

Quick

0 decimals

Rounded to whole numbers

Rough estimates and quick calculations

123
Example

Standard

2 decimals

Two decimal places

Most everyday conversions

123.46
Example

Precise

4 decimals

Four decimal places

Scientific and engineering work

123.4568
Example

Current Precision

Standard mode active

2 decimals
Magnetic Field Strength Converter

Convert between ampere per meter, oersted, and other electromagnetic field units

SI Standard
A/m
CGS System
Oe
Popular Magnetic Field Strength Unit Conversions
Ampere per meter → Oersted
1 A/m = 0.01257 Oe
Oersted → Ampere per meter
1 Oe = 79.577 A/m
Kiloampere per meter → Oersted
1 kA/m = 12.57 Oe
Millioersted → Ampere per meter
1 mOe = 0.07958 A/m
Ampere per centimeter → Ampere per meter
1 A/cm = 100 A/m
Oersted → Kilooersted
1000 Oe = 1 kOe
Professional Applications

Magnetic Circuit Design

Transformers, inductors, electromagnetic devices

Permanent Magnet Analysis

Motor design, magnetic assemblies

EMC Testing

Field strength measurements, compatibility testing

Materials Testing

Magnetic characterization, permeability measurements

Complete Magnetic Field Strength Conversion Guide

Understanding Magnetic Field Strength Measurement

Magnetic field strength (H-field) represents the magnetizing force applied to create a magnetic field, independent of the material's magnetic properties. Unlike magnetic flux density, field strength measures the external influence that tends to magnetize materials. This quantity is fundamental in magnetic circuit design and electromagnetic field analysis.

Essential Conversion Factors

A/m to Oersted:1 A/m = 0.01257 Oe (approximate)
Oersted to A/m:1 Oe = 79.577 A/m (exact conversion)
kA/m to Oersted:1 kA/m = 12.57 Oe = 1,000 A/m
A/cm to A/m:1 A/cm = 100 A/m = 1.257 Oe
mOe to A/m:1 mOe = 0.07958 A/m

Relationship to Magnetic Flux Density

  • Magnetic flux density (B) = μ × Magnetic field strength (H)
  • In vacuum: B = μ₀ × H, where μ₀ = 4π × 10⁻⁷ H/m
  • In ferromagnetic materials: B = μᵣ × μ₀ × H (μᵣ = relative permeability)
  • Critical for understanding magnetic saturation and hysteresis loops
  • Essential for transformer and inductor design calculations

Common Magnetic Field Strength Values

Earth's magnetic field~40 A/m
Typical electromagnet1,000-100,000 A/m
Permanent magnet surface100,000-800,000 A/m
MRI gradient coils10,000-50,000 A/m
Transformer core50-500 A/m
Magnetic recording heads10,000-100,000 A/m

Magnetic Circuit Analysis

  • Magnetomotive force (MMF) = H × length of magnetic path
  • Reluctance calculations require field strength measurements
  • Critical for designing efficient magnetic devices
  • Essential for predicting magnetic saturation effects

Professional Tip

When designing magnetic circuits, always consider both field strength (H) and flux density (B). The relationship between them depends on the material's permeability, which varies significantly between air gaps and ferromagnetic cores.

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Magnetic Flux Density

Tesla, Gauss, Weber/m²

Force

Newton, Pound-force, Dyne

Energy

Joule, BTU, Calorie