Use the form below to do your conversion.
Solution
Step1
Log101991=Log(1991) ÷ Log(10)
Log(1991)= 3.2990712600274
Log(10)=1
Log101991=3.2990712600274 ÷ 1
Ans=3.2990712600274
Step2
Alternatively, the logarithm can be calculated like this.