How many megapixels for a poster
One of the most common questions asked in photography is “how many megapixels do I need for large blow-ups?” The answer depends on the resolution you choose. Generally, the higher resolution you choose, the better the quality of the printed image. The general rule of thumb is: If you wish to send your prints to a print shop, All about Digital Photos has written a fantastic guide explaining what you will need.
If you are printing the images yourself, use the table below as a guide to help you choose the best resolution for your needs. Paper Size in mm Pixels at 300 ppi (dpi*) Pixels at 150 ppi (dpi*) Pixels at 72 ppi (dpi*) A0 841 x 1189 9933 x 14043 4967 x 7022 2384 x 3370 A1 594 x 841 7016 x 9933 3508 x 4967 1684 x 2384 A2 420 x 594 4961 x 7016 2480 x 3508 1191 x 1684 A3 297 x 420 3508 x 4961 1754 x 2480 842 x 1191 A4 210 x 297 2480 x 3508 1240 x 1754 595 x 842 A5 148 x 210 1748 x 2480 874 x 1240 420 x 595 A6 105 x 148 1240 x 1748 620 x 874 298 x 420 A7 74 x 105 874 x 1240 437 x 620 210 x 298 A8 52 x 74 614 x 874 307 x 437 147 x 210 A9 37 x 52 437 x 614 219 x 307 105 x 147 A10 26 x 37 307 x 437 154 x 219 74 x 105 Source: DIN formate faq * DPI is short for Dots Per Inch and refers to dots per inch used in a printer. PPI is a measure of how an image is printed to a medium such as paper. For more information about the difference between DPI and PPI as well as a list of the most common mistakes, click on the link below.