Print Resolution Calculator
Calculate the maximum print size from your image resolution, or find the pixels needed for a target print size at any DPI.
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.