A new calculator available online can show you how much time you waste on social media in a given year, and what other things you could be doing with that time such as reading books. Lifehacker reports that the Omni calculator allows users to enter in how often they check social media per day, and how long they stay there during each visit. The calculator will then turn that into a book count, based on typical page counts and reading speeds.

For example, if you spent 1.87 hours per day on social media, based on the calculator’s default book length and reading speed settings, you could read 136 books in a single year. The calculator also has different settings to help you figure out how much time it would take to save money based on your salary, or how much activity you need to engage in to lose weight, and more.