Use the form below to do your conversion.
Solution
Step1
Log201981=Log(1981) ÷ Log(20)
Log(1981)= 3.2968844755385
Log(20)=1.301029995664
Log201981=3.2968844755385 ÷ 1.301029995664
Ans=2.5340572365943
Step2
Alternatively, the logarithm can be calculated like this.