Use the form below to do your conversion.
Solution
Step1
Log20391=Log(391) ÷ Log(20)
Log(391)= 2.5921767573959
Log(20)=1.301029995664
Log20391=2.5921767573959 ÷ 1.301029995664
Ans=1.9924035310754
Step2
Alternatively, the logarithm can be calculated like this.