Use the form below to do your conversion.
Solution
Step1
Log20643=Log(643) ÷ Log(20)
Log(643)= 2.8082109729242
Log(20)=1.301029995664
Log20643=2.8082109729242 ÷ 1.301029995664
Ans=2.1584521358334
Step2
Alternatively, the logarithm can be calculated like this.