Magnitude of a complex number

Gives the distance of a complex number from the origin in the complex plane, computed from its real and imaginary parts. It is used whenever the size of a complex number is needed, such as in polar form or when dividing complex numbers.

|z| = \sqrt{\operatorname{Re}(z)^2 + \operatorname{Im}(z)^2}

What the symbols mean

complex number
real part of z
imaginary part of z
magnitude (modulus) of z, a non-negative real number

About this formula

  • FieldMathematics
  • TopicComplex numbers
  • LevelHigh school
  • Also calledmodulus of a complex number, complex modulus, absolute value of a complex number, complex absolute value, distance from origin complex plane, magnitude of complex number formula
  • SourceWikidata Q3317982

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