Some HP inkjet printers, like the workhorse HP OfficeJet Pro 9015e and the affordable HP Envy Inspire 7955e include six months of free ink.
That means you might not even need to check ink levels if you subscribe to this program. The printer monitors ink levels and attempts to send replacement ink before a cartridge runs out. HP's Instant Ink program makes ink refills automatic. Let's take a look at how to check ink levels on an HP, Canon, Epson, and Brother printer. Given the importance of maintaining a good supply of ink, it should be easy to find out how much remains, and the top names in printing do a nice job with this.