For what length of time can you live after kidney failure if you recieve no treatment?

It depends on urine: If patient passes no urine at all, the longevity is very short (ie, days). If patient makes urine output, then it depends on 2 factors, the quality and quantity of urine output. The general range is few to several months. Your doctor is in better position to give you a better estimate. However, we only judge from previous precedents. Everyone's different. There is a higher power that decides death.