Use the form below to do your conversion.
Solution
Step1
Log139509=Log(9509) ÷ Log(13)
Log(9509)= 3.9781348473983
Log(13)=1.1139433523068
Log139509=3.9781348473983 ÷ 1.1139433523068
Ans=3.571218266315
Step2
Alternatively, the logarithm can be calculated like this.