Image Size and Resolution Requirements

Application	Ideal Image Size (in pixels)	Resolution (in pixels/inch)
For mobile phones and portable devices with small screens:	320 x 240 pixels	72 ppi
For emails, online sharing sites and viewing on standard computer monitors:	1024 x 768 pixels	72 ppi
Viewing at full-screen size on LCD monitors with 5:4 aspect ratio	1280 x 1024 pixels	72 ppi
Viewing on standard definition TV sets with 4:3 aspect ratios:	720 x 576 pixels	72 ppi
Viewing on widescreen standard definition TV sets:	1280 x 720 pixels	72 ppi
Viewing on high definition TV sets:	1920 x 1080 pixels	72 ppi

You need a much higher resolution when you want to make prints of your digital photos. For photos that will be examined closely – i.e. print sizes up to A4 – the recommended output resolution is 300 pixels/inch. For larger prints, which will be viewed from greater distances, the print resolution can be somewhat lower. The table below relates the output size required for high-quality photo prints to sensor megapixel counts.

Sensor Resolution (megapixels)	Typical Image Resolution (pixels)	Maximum Print Size	Print Resolution	Maximum Output Size
2.16	1800 x 1200	6 x 4 inch	300 dpi	Snapshot prints
3.9	2272 x 1704	7.6 x 5.7 inch	300 dpi	‘Jumbo’ snapshot prints
5.0	2592 x 1944	8.6 x 6.5 inch	300 dpi	8 x 6 inch enlargements
7.1	3072 x 2304	10.2 x 7.7 inch	300 dpi	A4 sized prints
8.0	3264 x 2448	13.6 x 10.2 inch	240 dpi	A4 sized prints
10.0	3648 x 2736	18.2 x 13.7 inch	200 dpi	A3 sized prints
12.1	4000 x 3000	20 x 15 inch	200 dpi	A3+ sized prints
14.7	4416 x 3312	22.1 x 16.6 inch	200 dpi	A2 sized prints
21.0	5616 x 3744	31.2 x 20.8 inch	180 dpi	A1 sized prints

This is an excerpt from Post Capture Pocket Guide.

Click here for more details on this and other titles in the Pocket Guide series.

Visit epson.com.au for the latest Epson printers.