A standard full-size 24×36 inch poster requires 3600 × 5400 pixels at 150 DPI (optimal for poster viewing distance) or 7200 × 10800 pixels at 300 DPI.
Required Pixel Resolution
5,400 × 3,600 px
For 36 × 24 in at 150 DPI
💡 Pro Tip: 300 DPI is the industry standard for photo books and prints held close in hand. For large wall frames or posters viewed from a few feet away, 150 DPI yields crisp, professional results.