Use the form below to do your conversion.
Solution
Step1
Log21305=Log(305) ÷ Log(21)
Log(305)= 2.4842998393468
Log(21)=1.3222192947339
Log21305=2.4842998393468 ÷ 1.3222192947339
Ans=1.8788863914187
Step2
Alternatively, the logarithm can be calculated like this.