Print Resolution Calculator
Calculate maximum print size from image resolution or find pixels needed for a target print size.
Covers 72, 150, 200, and 300 DPI output quality levels.
Print Resolution determines how sharp a printed image will look. It depends on the image’s pixel dimensions and the print DPI (dots per inch).
Formula:
Print Size (inches) = Pixels / DPI
Pixels Needed = Print Size (inches) × DPI
In metric:
Print Size (cm) = Pixels / DPI × 2.54
DPI Quality Guidelines:
| DPI | Quality Level | Best For |
|---|---|---|
| 300 DPI | Professional / Gallery | Photo prints, magazines, fine art |
| 240 DPI | High quality | Consumer photo prints |
| 150 DPI | Good | Large posters viewed from 2+ ft |
| 100 DPI | Acceptable | Banners viewed from 3+ ft |
| 72 DPI | Screen only | Web images, not for print |
Camera Megapixels and Max Print Sizes (at 300 DPI):
| Megapixels | Pixel Dimensions | Max Print at 300 DPI |
|---|---|---|
| 8 MP | 3264 × 2448 | 10.9 × 8.2 in (27.7 × 20.7 cm) |
| 12 MP | 4000 × 3000 | 13.3 × 10.0 in (33.9 × 25.4 cm) |
| 20 MP | 5184 × 3888 | 17.3 × 13.0 in (43.9 × 32.9 cm) |
| 24 MP | 6000 × 4000 | 20.0 × 13.3 in (50.8 × 33.9 cm) |
| 36 MP | 7360 × 4912 | 24.5 × 16.4 in (62.3 × 41.6 cm) |
| 45 MP | 8192 × 5464 | 27.3 × 18.2 in (69.3 × 46.3 cm) |
| 61 MP | 9504 × 6336 | 31.7 × 21.1 in (80.5 × 53.7 cm) |
Viewing Distance Factor: The farther away a print is viewed from, the lower the DPI can be:
- Handheld print (12 inches / 30 cm): 300 DPI
- Wall art (2–3 feet / 60–90 cm): 150–200 DPI
- Poster (3–6 feet / 1–2 m): 100–150 DPI
- Banner/billboard (10+ feet / 3+ m): 50–100 DPI
Practical Example: A 24 MP camera produces 6000 × 4000 pixel images. At 300 DPI: max print = 20 × 13.3 inches (50.8 × 33.9 cm) — sharp enough for close viewing. At 150 DPI: max print = 40 × 26.7 inches (101.6 × 67.7 cm) — fine for wall art.
Tips:
- Always check actual pixel dimensions, not just megapixels. Cropping reduces available pixels.
- Upscaling (enlarging) an image does not add real detail. AI upscalers can help but have limits.
- JPEG compression does not reduce pixel count, but it can reduce detail.
- For large prints, shoot in RAW format for maximum quality.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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