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Print Size Calculator

Calculate the maximum print size for your camera or image based on megapixels and DPI. See print dimensions for 150, 240, and 300 DPI quality levels.

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Maximum Print Size by DPI

300 DPI — Professional
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0 × 0 cm
240 DPI — Standard
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0 × 0 cm
150 DPI — Large/Distance
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Standard Print Sizes

Check marks show sizes your image supports at 300 DPI

About This Tool

How big can you print your photos? It depends on your camera's resolution (megapixels) and the print quality (DPI) you need. This calculator shows the maximum print dimensions for any camera or image file, at three common quality levels: 150 DPI for viewing distance prints, 240 DPI for standard quality, and 300 DPI for professional close-up viewing. Enter your camera's megapixels (like 12 MP for iPhone or 45 MP for a Canon R5) or the exact pixel dimensions of your image. The calculator instantly shows the largest print you can make at each quality level — in both inches and centimeters. Popular camera presets are included for quick reference. Remember: DPI requirements depend on viewing distance. A billboard viewed from 50 feet needs only 20-50 DPI, while a photo book held at arm's length needs 240-300 DPI. This calculator focuses on prints viewed at typical distances (1-3 feet).

How to Use

1. Select a camera preset or enter custom megapixels/dimensions 2. View the maximum print size at three DPI levels: - 150 DPI: Good for large prints viewed from distance (2+ feet) - 240 DPI: Standard quality for most prints - 300 DPI: Professional quality for close viewing 3. Check standard print sizes to see which ones your image supports 4. Toggle between inches and centimeters as needed 5. Use "Copy Link" to save your calculation

Formula

Print Size (inches) = Pixel Dimension ÷ DPI Maximum print width = Image width in pixels ÷ DPI Maximum print height = Image height in pixels ÷ DPI Example: 6000 × 4000 pixel image (24 MP) At 300 DPI: 6000 ÷ 300 = 20" × 4000 ÷ 300 = 13.3" At 240 DPI: 6000 ÷ 240 = 25" × 4000 ÷ 240 = 16.7" At 150 DPI: 6000 ÷ 150 = 40" × 4000 ÷ 150 = 26.7" Megapixels to pixels (assuming 3:2 ratio): Width = √(MP × 1,000,000 × 1.5) Height = Width ÷ 1.5

Frequently Asked Questions

What DPI do I need for printing photos?
For prints viewed at arm's length (photo books, small prints), use 240-300 DPI. For wall prints viewed from 2-3 feet, 150-200 DPI is sufficient. For large prints and posters viewed from further away, 100-150 DPI works well. The closer the viewing distance, the higher the DPI needed.
How big can I print an iPhone photo?
iPhone 15/14 Pro (48 MP) can print up to 32" × 24" at 300 DPI, or 64" × 48" at 150 DPI. iPhone 15/14 standard (12 MP) can print 16" × 12" at 300 DPI, or 32" × 24" at 150 DPI. iPhone photos are excellent quality and suitable for most print sizes.
What is the difference between DPI and PPI?
PPI (pixels per inch) describes digital image resolution. DPI (dots per inch) describes print output. For practical purposes, they're used interchangeably when calculating print sizes. A 300 PPI image printed at 300 DPI gives a 1:1 pixel-to-dot ratio — the sharpest possible output.
Can I enlarge a photo beyond its maximum print size?
Yes, but quality degrades. Printing beyond the recommended size causes visible pixelation and softness. Modern AI upscaling software (like Topaz Gigapixel) can enlarge images 2-4× with reasonable quality, but results vary by image content. For critical work, capture at higher resolution.
How many megapixels do I need for large prints?
For an 8×10" print at 300 DPI, you need about 7 MP. For 16×20" at 300 DPI, you need 29 MP. For 24×36" at 300 DPI, you need 65 MP. However, viewing distance matters — a 24×36" print viewed from 3+ feet looks great at 150 DPI (only 16 MP needed).
What print size can I get from 12 megapixels?
A 12 MP camera (like iPhone 15 standard or older DSLRs) produces roughly 4000×3000 pixels. At 300 DPI: 13.3" × 10". At 240 DPI: 16.7" × 12.5". At 150 DPI: 26.7" × 20". The 12 MP is plenty for most print needs up to 16×20".
Does aspect ratio affect print size?
Yes. A 3:2 sensor (most cameras) matches well with 4×6", 8×12", and 12×18" prints. A 4:3 sensor (phones, Micro 4/3) matches 8×10" and 16×20" better. Mismatched ratios require cropping, which loses some pixels and reduces maximum print size slightly.

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