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Magnetic Flux Conversion
Tool Description
Magnetic Flux Conversion is an online magnetic flux unit converter that supports mutual conversion between weber (Wb), maxwell (Mx), volt·second (V·s), and tesla·square meter (T·m²). Enter any value and unit to instantly view the corresponding results in all other units. Suitable for electromagnetics calculations, motor design, transformer analysis, physics study, and more.
How to Use
- Enter a value
Type the magnetic flux value you want to convert, supporting integers and decimals, e.g.,
0.5,1000000 - Select source unit
Choose the magnetic flux unit of your value from the dropdown (Wb/Mx/V·s/T·m²)
- View results
Click the "Convert" button or press Enter, and the result area below will display the corresponding values in all units. Each result has a copy button for convenience.
Use Cases
- Electromagnetics calculation: In Faraday's law of electromagnetic induction, the induced EMF equals the negative rate of change of magnetic flux (ε = -dΦ/dt). When calculating, you may need to convert between weber (Wb) and maxwell (Mx), and this tool enables quick unit conversion
- Motor and transformer design: In the magnetic circuit design of motors and transformers, the magnetic flux in the core is a key parameter, typically expressed in webers. Some older literature or CGS system data uses maxwells (Mx). Use this tool to unify units for comparison and analysis
- Physics study: When studying the fundamentals of electromagnetism, understand the relationship between magnetic flux (Wb) and magnetic flux density (T) — Φ = B·S, 1 Wb = 1 T·m² — as well as the conversion between SI and CGS unit systems, and visually verify with this tool
Key Advantages
- Free and Easy
The tool is completely free, requiring no registration or installation. Just open the page and start using it, lowering the barrier to entry.
- Local Computation
All conversions run in your browser; your input data is never uploaded to a server, ensuring privacy and security.
- Instant to Use
The interface is clean and intuitive. Enter a value and unit to get all results with one click—no complex operations to learn.
- Full Coverage
Supports mutual conversion among major magnetic flux units such as weber, maxwell, volt·second, and tesla·square meter.
- Precise Relations
Uses definitional equivalence (1 Wb = 1 V·s = 1 T·m²) and a strict decimal conversion (1 Mx = 10⁻⁸ Wb), delivering accurate and reliable results.
- One-Click Copy
Each result has a copy button on the right, so you can quickly paste values into documents or spreadsheets for further use.
Magnetic Flux Unit Conversion Relationships
The following shows the conversion relationships between magnetic flux units, with weber (Wb) as the base unit:
| Unit Name | Abbr. | Conversion Relationship | Equivalent Wb |
|---|---|---|---|
| Weber | Wb | 1 Wb = 1 V·s = 1 T·m² | 1 |
| Maxwell | Mx | 1 Mx = 10⁻⁸ Wb | 10⁻⁸ |
| Volt·Second | V·s | 1 V·s = 1 Wb | 1 |
| Tesla·Square Meter | T·m² | 1 T·m² = 1 Wb | 1 |
Significance of Magnetic Flux in Electromagnetism
Magnetic flux (symbol Φ) is a physical quantity that describes the total magnetic field passing through a given surface. In a uniform magnetic field, the magnetic flux through a plane of area S is: Φ = B·S·cosθ, where B is the magnetic flux density (unit: tesla T), S is the area (unit: m²), and θ is the angle between the magnetic field direction and the normal to the plane.
The SI unit of magnetic flux is the weber (Wb): 1 Wb = 1 T·m² = 1 V·s. The weber is defined by Faraday's law of electromagnetic induction — when the magnetic flux through a loop changes at a rate of 1 Wb/s, an induced EMF of 1 V is generated in the loop. In the CGS system, the unit of magnetic flux is the maxwell (Mx), with the conversion 1 Mx = 10⁻⁸ Wb.
Magnetic flux is a key physical quantity linking electric and magnetic fields: changing magnetic flux produces induced EMF (Faraday's law), while electric current produces magnetic flux (Ampère's law). In devices such as transformers, generators, motors, and electromagnets, magnetic flux is a core design parameter.
Typical Magnetic Flux Values by Application
The following shows typical magnetic flux ranges in different application scenarios for reference comparison:
| Application Scenario | Magnetic Flux Range |
|---|---|
| Flux quantum (superconducting physics) | ~ 10⁻¹² Wb |
| Weak magnetic signals (biomagnetic measurement) | 10⁻⁶ ~ 10⁻⁴ Wb |
| Small relay / sensor magnetic core | 10⁻⁴ ~ 10⁻² Wb |
| Small-to-medium transformer core | 10⁻² ~ 1 Wb |
| Large power transformer core | 1 ~ 100 Wb |
| Superconducting magnet / MRI equipment | > 1,000 Wb |
FAQ
Weber (symbol Wb) is the standard SI unit of magnetic flux, named after German physicist Wilhelm Weber. 1 weber is defined as: when the magnetic flux through a single-turn coil decreases uniformly to zero in 1 second, if an induced EMF of 1 volt is generated in the coil, then the magnetic flux is 1 weber. That is, 1 Wb = 1 V·s = 1 T·m². The weber is one of the most important units in electromagnetism, directly related to Faraday's law of electromagnetic induction.
1 Mx = 10⁻⁸ Wb, 1 Wb = 10⁸ Mx (i.e., 100 million maxwells). The maxwell (symbol Mx) is the unit of magnetic flux in the centimeter-gram-second (CGS) electromagnetic unit system, named after British physicist James Clerk Maxwell. In engineering practice, the SI weber is the mainstream, but some older literature and magnetic material handbooks may still use maxwells, so understanding the conversion is necessary.
According to Faraday's law of electromagnetic induction: induced EMF ε = -N·dΦ/dt, where N is the number of coil turns and dΦ/dt is the rate of change of magnetic flux. When N=1, and the magnetic flux changes by 1 Wb in 1 second, the magnitude of the induced EMF is 1 V. Therefore 1 Wb = 1 V·s. This is the definitional formula of the weber, reflecting the intrinsic connection between magnetic flux and electromagnetic induction. In circuit analysis, the unit of inductance, the henry (H), can also be expressed as 1 H = 1 Wb/A = 1 V·s/A.
1 T·m² = 1 Wb, the two are numerically equivalent. Magnetic flux Φ is defined as the product of magnetic flux density B and area S (in a uniform magnetic field): Φ = B·S. Therefore, the unit of magnetic flux, weber (Wb), equals the unit of magnetic flux density, tesla (T), multiplied by the unit of area, square meter (m²). The tesla (T) describes the strength of the magnetic field, while the weber (Wb) describes the total magnetic flux passing through a given area. For example, if the magnetic flux density is 1 T over an area of 1 m², the magnetic flux through that area is 1 Wb.
No. All conversion calculations are performed entirely in your browser locally using pure JavaScript math. Your input data never leaves your device, so please feel free to use it.
This tool uses JavaScript double-precision floating-point numbers (64-bit IEEE 754) for calculations, which is sufficiently accurate for most everyday scenarios. The weber, volt·second, and tesla·square meter have definitional equivalence (1 Wb = 1 V·s = 1 T·m²), and the maxwell follows a strict decimal relationship with the weber (1 Mx = 10⁻⁸ Wb) with no approximate conversions, so results are precise within floating-point range. Up to 6 significant decimal places are retained, with excess digits automatically truncated. For extremely large or small values, minor errors may occur due to floating-point precision limits, but this has virtually no impact in practical applications.
It supports 4 common magnetic flux units: weber (Wb), maxwell (Mx), volt·second (V·s), and tesla·square meter (T·m²). Enter any unit and value, and the tool immediately shows the corresponding result in the other 3 units, making it easy to switch freely between the SI and CGS systems.
Currently it converts a single value instantly. Enter one value and select the source unit, and the results area shows all target units simultaneously. To process large batches of data, copy the results one by one. For higher-frequency batch needs, member benefits offer a more efficient tool experience.
It wins on being lightweight and instant. Unlike professional electromagnetic simulation software that requires installation and licensing, this tool needs no download and works as soon as you open the page. It covers all everyday magnetic flux unit conversion needs, ideal for teaching, literature review, and quick checks. For complex electromagnetic field simulation, professional software is still recommended.
It is usually an input format issue. Make sure the input box contains a valid number (integers and decimals such as 0.5, 1000000) with no spaces, letters, or special symbols. If there is still no result, try refreshing the page and entering again. The tool computes entirely locally, so it is not affected by network fluctuations.
They describe different levels of physical quantities. Magnetic field strength (H, unit A/m) describes the magnetic field produced by an external source; magnetic flux (Φ, unit Wb) describes the total magnetic field passing through a surface, equal to the product of magnetic flux density B and area S (Φ = B·S). Magnetic flux conversion and magnetic field strength conversion are different physical quantities, and this tool provides separate conversion pages for each—please pay attention to the distinction when using them.
Yes. The page is responsive and works normally on mobile browsers for input, conversion, and copying. All calculations run locally, so the mobile experience is smooth—no app installation required to convert units anytime, anywhere.
Content last updated：2026-07-17
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