Use the form below to do your conversion.
Solution
Step1
Log215143=Log(5143) ÷ Log(21)
Log(5143)= 3.7112165243211
Log(21)=1.3222192947339
Log215143=3.7112165243211 ÷ 1.3222192947339
Ans=2.8068086278138
Step2
Alternatively, the logarithm can be calculated like this.