Use the form below to do your conversion.
Solution
Step1
Log21509=Log(509) ÷ Log(21)
Log(509)= 2.7067177823368
Log(21)=1.3222192947339
Log21509=2.7067177823368 ÷ 1.3222192947339
Ans=2.0471020148601
Step2
Alternatively, the logarithm can be calculated like this.