Use the form below to do your conversion.
Solution
Step1
Log21805=Log(805) ÷ Log(21)
Log(805)= 2.9057958803679
Log(21)=1.3222192947339
Log21805=2.9057958803679 ÷ 1.3222192947339
Ans=2.1976656156365
Step2
Alternatively, the logarithm can be calculated like this.