Use the form below to do your conversion.
Solution
Step1
Log21491=Log(491) ÷ Log(21)
Log(491)= 2.691081492123
Log(21)=1.3222192947339
Log21491=2.691081492123 ÷ 1.3222192947339
Ans=2.0352762229691
Step2
Alternatively, the logarithm can be calculated like this.