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  • is of the form
  • is value of the base.


  • This function gives the common logarithm of a complex number.
  • In , where Complexnumber is in the form of . i.e & are the real numbers.
  • And is the imaginary unit ..
  • Log base 10, is known as the common Logarithm or Decadic logarithm, is the logarithm to the base 10.
  • To find the common logarithm of a complex number, we have to calculate from the Natural Logarithm.
  • So .
  • We can use COMPLEX function to convert real and imaginary number into a complex number.


  1. =IMLOG10("6+7i") = 0.964709462857146+0.37443569720420i
  2. =IMLOG10("4-5i") = 0.806391928359868-0.389151908999031i
  3. =IMLOG10("8") = 0.903089986991944
  4. =IMLOG10("3i") = 0.477121254719662+0.682188176920921i
  5. =IMLOG10("0") = NULL

Related Videos

Log of Complex Number

See Also


Binary Logarithm