Use the form below to do your conversion.
Solution
Step1
Log21991=Log(1991) ÷ Log(2)
Log(1991)= 3.2990712600274
Log(2)=0.30102999566398
Log21991=3.2990712600274 ÷ 0.30102999566398
Ans=10.959277505721
Step2
Alternatively, the logarithm can be calculated like this.