4 log 16Logarithm calculator to generate step by step calculation for how to find what is log base 4 of 16? Logarithm base 4 of 16 is 2. log 4 (16)log2 16 = 4, since 24 = 2 × 2 × 2 × 2 = 16. · Logarithms can also be negative: log 2 1 2 = − 1 {textstyle log _{2}!{frac {1}{2}}=