4 log 16The log base 2 calculator quickly computes the value of the logarithm Similarly, log₂ 16 = 4 or log₂ 32 = 5. But what is, say, log₂ 5? Surely, 5Here is the answer to questions like: Log base 16 of 4 or what is the base 16 log of 4? Use our | Log16 calculator to find the logarithm of any positive number for any number base you enter.