To ensure your printer is not running out of ink, you may have to check the ink levels. Here is your guide to how to check ink levels on HP printer. You can use the HP Print and Scan Doctor tool to check the ink level. First of all, run the tool and click on the Printer/Supply levels. The estimated ink and toner levels will appear on the screen, and you can check the ink levels. Furthermore, you can also use the HP Smart app to check the ink levels for Windows 10, iOS, and Android devices.