Use the form below to do your conversion.
Solution
Step1
Log131991=Log(1991) ÷ Log(13)
Log(1991)= 3.2990712600274
Log(13)=1.1139433523068
Log131991=3.2990712600274 ÷ 1.1139433523068
Ans=2.9616149270027
Step2
Alternatively, the logarithm can be calculated like this.