Use the form below to do your conversion.
Solution
Step1
Log81991=Log(1991) ÷ Log(8)
Log(1991)= 3.2990712600274
Log(8)=0.90308998699194
Log81991=3.2990712600274 ÷ 0.90308998699194
Ans=3.6530925019068
Step2
Alternatively, the logarithm can be calculated like this.