Quick answer (at 3:2)
At 300 DPI a 20 MP image prints about 18.3 × 12.2 inches (46.4 × 30.9 cm) assuming a 3:2 aspect ratio.
By aspect ratio
3:2
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 5,477 × 3,651 | 18.26 × 12.17 in | 46.4 × 30.9 cm |
| 240 | 5,477 × 3,651 | 22.82 × 15.21 in | 58.0 × 38.6 cm |
| 200 | 5,477 × 3,651 | 27.39 × 18.25 in | 69.6 × 46.4 cm |
| 150 | 5,477 × 3,651 | 36.51 × 24.34 in | 92.7 × 61.8 cm |
4:3
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 5,164 × 3,873 | 17.21 × 12.91 in | 43.7 × 32.8 cm |
| 240 | 5,164 × 3,873 | 21.52 × 16.14 in | 54.7 × 41.0 cm |
| 200 | 5,164 × 3,873 | 25.82 × 19.36 in | 65.6 × 49.2 cm |
| 150 | 5,164 × 3,873 | 34.43 × 25.82 in | 87.4 × 65.6 cm |
1:1
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 4,472 × 4,472 | 14.91 × 14.91 in | 37.9 × 37.9 cm |
| 240 | 4,472 × 4,472 | 18.63 × 18.63 in | 47.3 × 47.3 cm |
| 200 | 4,472 × 4,472 | 22.36 × 22.36 in | 56.8 × 56.8 cm |
| 150 | 4,472 × 4,472 | 29.81 × 29.81 in | 75.7 × 75.7 cm |
16:9
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 5,963 × 3,354 | 19.88 × 11.18 in | 50.5 × 28.4 cm |
| 240 | 5,963 × 3,354 | 24.85 × 13.97 in | 63.1 × 35.5 cm |
| 200 | 5,963 × 3,354 | 29.82 × 16.77 in | 75.7 × 42.6 cm |
| 150 | 5,963 × 3,354 | 39.75 × 22.36 in | 101.0 × 56.8 cm |
How we calculate this
- Convert 20 MP to approximate pixels for an aspect ratio.
- Divide each pixel dimension by DPI → inches:
inches = pixels ÷ DPI. - Convert inches to centimeters:
cm = inches × 2.54.