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Magnetic Flux Converter

Science

Convert magnetic flux between weber, milliweber, microweber, and maxwell instantly — distinct from magnetic flux density (Tesla/Gauss) values.

Reviewed by the thecalcu.com team · Last updated July 27, 2026

From
To
All conversionsfor 1 Maxwell (Mx)
Weber (Wb)1.0000e-8
Milliweber (mWb)0.00001
Microweber (µWb)0.01
Maxwell (Mx)1

What is a Magnetic Flux?

The Magnetic Flux Converter converts magnetic flux between weber, milliweber, and microweber (SI), and maxwell (the legacy CGS unit). Magnetic flux measures the total magnetic field passing through a given surface area, distinct from magnetic flux density, which the existing Magnetic Field Converter covers, and which measures that field's strength per unit area rather than the total quantity.

Enter a value in any supported unit and the converter calculates the equivalent instantly. For the related quantity in electromagnetic induction, see the Inductance Converter.

Why Use a Magnetic Flux Converter?

Transformer and generator design calculations use SI-based weber, but some older scientific literature and specialised electromagnetics references still use the CGS maxwell unit, related by a factor of 10⁸. Comparing or combining flux data across these sources requires accurate conversion.

Who Should Use This Converter?

  • Transformer and generator design engineers working with magnetic flux calculations for core design.
  • Physics students and researchers converting magnetic flux values between SI and legacy CGS units from older references.
  • Magnetic sensor engineers working with flux measurements across different unit conventions.

What Insights Does the Magnetic Flux Converter Give You?

The main output is the converted value in your chosen target unit, calculated precisely from the fixed multiplier relationship between units. Because the weber and maxwell differ by a factor of 100 million, the converter helps avoid a significant order-of-magnitude error when working with legacy CGS-based data.

How to use this Magnetic Flux calculator

  1. Choose your starting unit from the source dropdown, for example, "Maxwell (Mx)".
  2. Enter the numeric value you want to convert in the input field.
  3. Choose your target unit from the destination dropdown, for example, "Weber (Wb)".
  4. Read the converted result, which updates instantly as you type or change units.
  5. Use the swap (⇅) button if you need to reverse the conversion direction.
  6. Use the copy button to grab the result for a transformer design calculation or physics problem.
Show formula & methodology ↓Show less ↑

Formula & Methodology

The converter's base unit is the weber (Wb). Every supported unit has a fixed multiplier:

- 1 milliweber (mWb) = 0.001 Wb
- 1 microweber (µWb) = 0.000001 Wb
- 1 maxwell (Mx) = 0.00000001 Wb (exactly 10⁻⁸ Wb)

Any conversion follows:

Result = Input × (toBase of source unit ÷ toBase of target unit)

Worked example, converting 50,000 maxwell to weber:

Result = 50,000 × 0.00000001 = 0.0005 Wb (0.5 mWb)

This confirms how a CGS-scale flux value from an older reference translates to the SI weber unit used in modern engineering calculations.

Related Tools

You may also find these useful: Magnetic Field Strength Converter.

Frequently Asked Questions

What is magnetic flux, and how is it different from magnetic flux density?
Magnetic flux (in weber) measures the total magnetic field passing through a given surface area, while magnetic flux density (in Tesla or Gauss, covered by the existing [Magnetic Field Converter](/magnetic-field-converter/)) measures that field's strength per unit area, flux is the total quantity over an area, density is the per-area rate, despite the similar-sounding names.
How do I convert maxwell to weber?
Multiply the maxwell value by 0.00000001 (1 × 10⁻⁸), since one maxwell equals exactly 10⁻⁸ weber. Enter your value with 'Maxwell (Mx)' as the source and 'Weber (Wb)' as the target to apply this automatically.
Why does the maxwell (CGS) unit still appear in some contexts?
The maxwell persists in some older scientific literature, particularly astrophysics and certain specialised electromagnetics references, due to historical convention from before SI units became the universal scientific standard.
How does magnetic flux relate to electromagnetic induction?
Faraday's law of induction states that the induced voltage in a coil equals the rate of change of magnetic flux through it, a changing magnetic flux (measured in weber) is precisely what generates the voltage in generators, transformers, and induction-based sensors.
How do I convert magnetic flux to magnetic flux density?
Divide magnetic flux (in weber) by the cross-sectional area it passes through (in square metres) to get flux density in Tesla, see the [Magnetic Field Converter](/magnetic-field-converter/) for that related quantity's unit conversions.
What is a typical magnetic flux value for a small transformer core?
This varies significantly by transformer size and design, from microwebers for small signal transformers to several webers for large power transformer cores, so context determines what's typical for a specific application.
How does magnetic flux relate to inductance?
Inductance relates the magnetic flux linkage in a coil to the current producing it (flux linkage = L × I), a higher inductance means more magnetic flux is produced for the same current. See the [Inductance Converter](/inductance-converter/) for that related quantity.
Why is the weber such a large unit compared to typical measured values?
One weber represents a substantial amount of magnetic flux by everyday standards (roughly what you'd get from a 1 Tesla field through a 1 square metre area), so most real-world measurements in electronics and small transformers fall in the milliweber or microweber range.
What industries commonly need magnetic flux unit conversion?
Transformer and inductor core design, generator and motor engineering, and magnetic sensor design all routinely work with magnetic flux calculations, occasionally needing conversion between the SI weber and legacy CGS maxwell units from older references.
Is magnetic flux a vector or scalar quantity?
Magnetic flux through a specific surface is technically a scalar quantity (a single number for that surface), though it's derived from the magnetic field, which is a vector, the flux calculation accounts for the field's direction relative to the surface it's passing through.
Also known as
magnetic flux converterweber to maxwell converterwb to mwb convertermaxwell to weber convertermagnetic flux units