This is a difficult question to answer, as it depends on a number of factors, such as the type of inkjet printer, the quality of the ink cartridges, and how often the printer is used. However, a typical inkjet printer can print up to 5000 pages before the ink cartridge needs to be replaced. So, if you print an average of 50 pages per week, your printer should last for approximately 100 weeks, or about 2 years.