Use the form below to do your conversion.
Solution
Step1
Log91991=Log(1991) ÷ Log(9)
Log(1991)= 3.2990712600274
Log(9)=0.95424250943932
Log91991=3.2990712600274 ÷ 0.95424250943932
Ans=3.4572671280027
Step2
Alternatively, the logarithm can be calculated like this.