Use the form below to do your conversion.
Solution
Step1
Log21811=Log(811) ÷ Log(21)
Log(811)= 2.9090208542112
Log(21)=1.3222192947339
Log21811=2.9090208542112 ÷ 1.3222192947339
Ans=2.2001046768846
Step2
Alternatively, the logarithm can be calculated like this.