Photo Print Sizes: How Many Pixels and Megapixels You Need at 300 DPI
October 21, 2026
Digital images are made of pixels, and printed images are made of dots. The print resolution, in dots per inch (DPI) or pixels per inch (PPI), says how many pixels are used per inch of paper. To print a photo at a given size and quality, multiply the dimensions in inches by the desired DPI. Photo labs commonly recommend 300 DPI for prints viewed up close. An 8 × 10 inch print at 300 DPI needs 2,400 × 3,000 pixels, which is 7.2 megapixels.
Larger prints viewed from farther away look sharp at lower resolutions, since the eye cannot resolve fine detail at a distance. A 16 × 20 inch print at 150 DPI also needs 2,400 × 3,000 pixels, the same file as the 8 × 10 at 300 DPI.
Skip the math and get your answer instantly:
Open the Aspect Ratio Calculator →Pixel Requirements by Print Size
The table shows pixel dimensions and megapixels for common sizes at 300 DPI (high quality for close viewing) and 150 DPI (acceptable for larger prints viewed from a distance). Megapixels equal width in pixels times height in pixels divided by 1,000,000.
Most modern smartphones and cameras capture 12 to 48 megapixels, which is enough for large prints in many cases.
| Print size | Pixels at 300 DPI | Megapixels at 300 DPI | Megapixels at 150 DPI |
|---|---|---|---|
| 4 x 6 in | 1,200 x 1,800 | 2.2 | 0.5 |
| 5 x 7 in | 1,500 x 2,100 | 3.2 | 0.8 |
| 8 x 10 in | 2,400 x 3,000 | 7.2 | 1.8 |
| 11 x 14 in | 3,300 x 4,200 | 13.9 | 3.5 |
| 16 x 20 in | 4,800 x 6,000 | 28.8 | 7.2 |
| 24 x 36 in | 7,200 x 10,800 | 77.8 | 19.4 |
Viewing Distance and Quality
The eye resolves about one arcminute of detail. At a viewing distance of 12 inches, that corresponds to about 290 DPI, which is why 300 DPI is the standard for close-up viewing like photo books. At 3 feet, the limit is about 95 DPI; at 10 feet, about 29 DPI. Billboards are printed at very low DPI because they are viewed from far away. For wall art viewed from a few feet, 150 to 200 DPI is generally fine.
File quality also matters: a sharp 12-megapixel image beats a blurry 24-megapixel one. Use good exposure, focus, and avoid heavy compression.
Aspect Ratio and Cropping
Cameras produce a 3:2 ratio (like 4 × 6 inches), while 8 × 10 prints use a 5:4 ratio, so a 3:2 photo printed at 8 × 10 loses some of the long side or leaves white borders. Crop deliberately: a 6,000 × 4,000 pixel image cropped to 5:4 becomes 5,000 × 4,000 pixels, which at 300 DPI covers a print of about 16.7 × 13.3 inches. Plan the crop when composing the photo, leaving room around the subject.
Low-Resolution Images
If your image has too few pixels, you can enlarge it using software, but it cannot add real detail; modern AI upscaling can produce plausible detail but may alter the image. Another option is to print smaller or accept a lower DPI. A 1,200 × 1,800 pixel image prints well at 4 × 6 at 300 DPI, acceptably at 8 × 12 at 150 DPI, but will look soft at larger sizes. Web images at 72 or 96 PPI are not necessarily low quality: the DPI tag is irrelevant to the pixel count; what matters is the total number of pixels.
File Size and Formats
An uncompressed 24-megapixel image uses about 72 MB (3 bytes per pixel). JPEG compression reduces this to 5 to 15 MB at high quality. For printing, use the highest-quality JPEG or TIFF, avoid resaving a JPEG repeatedly, and check the printer's recommended color profile.
Frequently Asked Questions
How many pixels do I need for an 8x10 print?
2,400 by 3,000 at 300 DPI, or 7.2 megapixels.
Is 300 DPI always necessary?
No. For larger prints viewed from a distance, 150 to 200 DPI is often adequate.
How many megapixels do I need for a 16x20 print?
About 7.2 megapixels at 150 DPI, or 28.8 at 300 DPI.
Why does my 3:2 photo get cropped at 8x10?
Because 8x10 has a different aspect ratio (5:4) than the camera's 3:2.
Can software add resolution to a small photo?
It can enlarge it, but it cannot restore real detail.