You have probably heard this term many times before especially in the context of printing your digital photos. DPI is sometimes used as a measurement of digital photo printing quality while the truth is that DPI is an indicator of the printer quality. DPI stands for Dots per Inch. DPI is a physical characteristic of a printer. Every printer prints dots that when put next to each other comprise a photo. Each dot has a physical size. DPI is also known as the maximum resolution that a printer is capable of. Low-end printers have lower DPI while high-end printers have higher DPI. DPI is defined as the number of dots a printer can print per inch. For example if a printer supports 1200 DPI it means that the printer can print 1200 dots per inch (on both X or Y axis). When printing it is important to make sure that the DPI is higher or equal to the number of pixels per inch in the source photo. If the DPI is lower the printer will not be able to fully display the high resolution photo. When the DPI is higher the printer will use multiple dots to represent one photo pixel. DPI is not relative to the page size. DPI is a fixed number for a given printer.
Inkjet printers are capable of printing images with resolution of 300DPI(Dots Per Inch) to 720 DPI(Dots Per Inch). Inkjet printers produce high-resolution images and used for printing photo quality printers. So, in a nutshell, the higher DPI (Dots Per Inch) is going to result in a higher quality printed image and allow you to expand the size of a print to much larger than you'd be able to. Shooting RAW files, instead of low resolution, also has an effect. Low resolution photographs are hard to 'blow up' beyond it's original size without losing it's crisp sharp characteristics, due to the very low resolution of your camera or not using HDR on your mobile phone camera.
Some favorite printers we like that you may like to check out: HP Deskjet 3630. Small, affordable and smartly designed, Epson WorkForce Pro WF-4630 review. Economical print costs for volume printing, Epson WorkForce WF-100. A portable and easy-to-use printer, Canon Pixma MG7150, Brother DCP-J4120DW, HP Envy 5540 All-in-One printer are just a few. If you are looking for large wall art print outs for wall art, that's another blog post.
Now you know. :)