Use the form below to do your conversion.
Solution
Step1
Log218215=Log(8215) ÷ Log(21)
Log(8215)= 3.9146075677711
Log(21)=1.3222192947339
Log218215=3.9146075677711 ÷ 1.3222192947339
Ans=2.9606341273055
Step2
Alternatively, the logarithm can be calculated like this.