Print Size Calculator
Calculate the maximum high-quality print size for your camera's megapixels, or find the exact resolution needed for standard print dimensions.
Max Print Size
Important Math & Conversions
| Print Size (Inches) | Pixels Required | Megapixels |
|---|---|---|
| 4 × 6 (Postcard) | 1200 × 1800 | 2.2 MP |
| 5 × 7 | 1500 × 2100 | 3.2 MP |
| 8 × 10 | 2400 × 3000 | 7.2 MP |
| 11 × 14 | 3300 × 4200 | 13.9 MP |
| 16 × 20 (Poster) | 4800 × 6000 | 28.8 MP |
| 24 × 36 (Large) | 7200 × 10800 | 77.8 MP |
Complete Guide to Print Resolution
Understanding the relationship between pixels, DPI, and physical print size is essential for producing high-quality photographic prints at any dimension.
What is DPI / PPI?
DPI (Dots Per Inch) and PPI (Pixels Per Inch) measure the density of an image when printed. DPI technically refers to the printer's output dots, while PPI refers to the image's pixel density. In practice, they are used interchangeably. 300 DPI is the industry gold standard for photographic prints viewed at reading distance (about 12 inches away). At 300 DPI, individual pixels are invisible to the naked eye.
Viewing Distance & DPI
You do not always need 300 DPI. As the physical print gets larger, the viewer naturally stands further away.
DPI Guidelines by Print Type
• Magazine / 8×10 Photo: 300 DPI (viewed at arm's length)
• 24×36 Poster: 150-200 DPI (viewed from 3-4 feet)
• Trade Show Banner: 72-100 DPI (viewed from 6+ feet)
• Highway Billboard: 15-30 DPI (viewed from 100+ feet)
Do Megapixels Matter?
Megapixels determine the maximum print size at a given DPI. A 12MP camera can produce excellent 8×10 prints at 300 DPI, while a 50MP camera can print gallery-quality 16×24 prints. However, for typical social media and screen viewing, even 2-4 megapixels is more than sufficient. The quality of the lens, sensor size, and shooting technique often matter more than raw megapixel count.
Can You Upscale for Larger Prints?
Modern AI upscaling tools (like Topaz Gigapixel, Adobe Super Resolution, or ON1 Resize) can effectively double or quadruple your image resolution with impressive quality. This allows smaller files to be printed at larger sizes. However, there are limits—heavily upscaled images can appear artificially smooth on close inspection.
Frequently Asked Questions
How big can I print a 24 megapixel photo?
A 24MP image (approx. 6000×4000 pixels) can print at 20"×13.3" at 300 DPI, or 40"×26.7" at 150 DPI for a canvas or poster.
What resolution do I need for a canvas print?
Canvas prints are typically viewed from further away and have a textured surface that hides pixels. 150 DPI is usually sufficient, meaning you need far fewer megapixels than for a glossy photo print.
Does cropping affect print size?
Yes! Cropping removes pixels, reducing the effective resolution. A heavily cropped 50MP image might only have 10-15MP of usable data. Always shoot at the widest composition possible and crop sparingly.