Use the form below to do your conversion.
Solution
Step1
Log111991=Log(1991) ÷ Log(11)
Log(1991)= 3.2990712600274
Log(11)=1.0413926851582
Log111991=3.2990712600274 ÷ 1.0413926851582
Ans=3.1679416487606
Step2
Alternatively, the logarithm can be calculated like this.