Magnetic Flux and Field Converter (Wb, Maxwell, Tesla, Gauss

Electromagnetics: Magnetic Flux (Φ) vs. Flux Density (B)

Magnetic flux measures the total number of magnetic field lines passing perpendicularly through a given surface area.

The SI and CGS Magnetic Units

• Weber (Wb): The SI unit of magnetic flux).

• Maxwell (Mx): The historical CGS unit of magnetic flux).

• Tesla (T): SI unit of magnetic field strength / flux density).

• Gauss (G): CGS unit of magnetic flux density).

How to Use This Calculator

Enter your Magnetic Flux Value (e.g. 1), From Unit — choose from Webers (Wb, Base SI / Volt-Seconds), Milliwebers (mWb, 10⁻³ Wb), Microwebers (µWb, 10⁻⁶ Wb), To Primary Target Unit — choose from Maxwells (Mx / Magnetic Lines), Webers (Wb), Milliwebers (mWb), and Loop / Core Cross-Sectional Area (m², for Magnetic Field B = Φ/A) (e.g. 0.01 (100 cm²)). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Universal electromagnetism and magnetic flux (Φ) formulas: to Maxwells: 1 Weber (Wb) = 10^8 Maxwells (Mx) = 100,000,000 lines of flux Flux Density (Tesla): B = (Φ) / (A) = (Webers) / (Area (m^2)) to Gauss: 1 Tesla (T) = 10,000 Gauss (G)'s Law of Induction: E = -N (dΦ) / (dt) (1 Wb = 1 Volt·second)

Worked Example

For example, converting 1.0 Weber of magnetic flux: \, 1,000 mWb, and 1,000,000 μWb. Passing through a coil with a cross-sectional area of 0.01 m^2, it produces a magnetic flux density of .

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.