This is a bit like asking "How long is a piece of string?" Are you asking about evolution from the emergence of life or the evolution of a single species?
Even the evolution of a single species can be different times, depending on the species. There is no hard-and-fast answer.
If you want a precise answer you will have to frame your question more precisely.
The whole process of evolution from the first emergence of life to now has taken some 3.8 to 4 billion years. The earth is about 4.5 billion years old. So it was lifeless for about half a billion years before the single-cell organisms started to emerg (very slowly).