Use the form below to do your conversion.
Solution
Step1
Log20689=Log(689) ÷ Log(20)
Log(689)= 2.8382192219076
Log(20)=1.301029995664
Log20689=2.8382192219076 ÷ 1.301029995664
Ans=2.181517129787
Step2
Alternatively, the logarithm can be calculated like this.