Use the form below to do your conversion.
Solution
Step1
Log21581=Log(581) ÷ Log(21)
Log(581)= 2.7641761323903
Log(21)=1.3222192947339
Log21581=2.7641761323903 ÷ 1.3222192947339
Ans=2.0905580060731
Step2
Alternatively, the logarithm can be calculated like this.