Use the form below to do your conversion.
Solution
Step1
Log181991=Log(1991) ÷ Log(18)
Log(1991)= 3.2990712600274
Log(18)=1.2552725051033
Log181991=3.2990712600274 ÷ 1.2552725051033
Ans=2.6281713704515
Step2
Alternatively, the logarithm can be calculated like this.