Unit of Magnetic Flux

Magnetism is indeed a vast chapter for students with a lot of topics and concepts to cover. However, on this page, we will discuss the unit of magnetic flux.

Well, in simple terms magnetic flux is defined as a measure of the strength of a magnetic field over a given area. It has the dimension mass length squared per time squared electric current [ML2T-2A-1]. It is denoted by the Greek letter Phi and has a symbol φ. Further, magnetic flux is basically used to describe the effects of the magnetic force on something occupying a given area. Now let’s look at the magnetic flux units.

SI Unit of Magnetic Flux

The SI unit of magnetic flux is the Weber (Wb). A flux density of one Wb/m2 (one Weber per square metre) is one Tesla (T). Weber is commonly expressed in a multitude of other units.

\(\begin{array}{l}Wb = \frac{kg.m^{2}}{s^{2}.A} = V.s = H.A = T.m^{2} = \frac{J}{A} = 10^{8}M.x\end{array} \)


  • Wb = Weber
  • T = Tesla
  • V = volt
  • m = metre
  • J = joule
  • s = second
  • H = Henry
  • A = ampere
  • Mx = Maxwell

The unit has also been named after German physicist, Wilhelm Eduard Weber.

Other Common Units

In the CGS unit of magnetic flux is measured in Abweber or Maxwell. Other units include statweber and unit_pole.

Summary Of Units

Name Symbols Context Prefixes
weber Wb SI SI
abweber abWb EMU SI
statweber statWb ESU SI
maxwell Mx standard SI
unit_pole standard SI

Submultiples and Multiples of Weber

Value SI symbol Name
10−1 Wb dWb deciweber
10−2 Wb cWb centiweber
10−3 Wb mWb milliweber
10−6 Wb µWb microweber
10−9 Wb nWb nanoweber
10−12 Wb pWb picoweber
10−15 Wb fWb femtoweber
10−18 Wb aWb attoweber
10−21 Wb zWb zeptoweber
10−24 Wb yWb yoctoweber


Value SI symbol Name
101 Wb daWb decaweber
102 Wb hWb hectoweber
103 Wb kWb kiloweber
106 Wb MWb megaweber
109 Wb GWb gigaweber
1012 Wb TWb teraweber
1015 Wb PWb petaweber
1018 Wb EWb exaweber
1021 Wb ZWb zettaweber
1024 Wb YWb yottaweber

Related articles:

Unit Of Current Unit Of Magnetic Field

Stay tuned with BYJU’S to learn other related concepts with the help of interactive and engaging video lessons.

Frequently Asked Questions


What is the value of Tesla?

Tesla is equal to 1 NA-1m-1.


What happens when magnetic field lines are close?

When magnetic field lines are close, the magnetic field becomes strong.


What is magnetic flux density?

The strength of the magnetic field that is the number of magnetic field lines crossing unit area is known as magnetic flux density.


What is the ratio between magnetic force and electric force on a charged particle getting undeflected in the field?

The ratio between magnetic force and electric force on a charged particle getting undeflected in the field is 1.

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