Quick answer (at 3:2)
At 300 DPI a 18 MP image prints about 17.3 × 11.5 inches (44.0 × 29.3 cm) assuming a 3:2 aspect ratio.
By aspect ratio
3:2
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 5,196 × 3,464 | 17.32 × 11.55 in | 44.0 × 29.3 cm |
| 240 | 5,196 × 3,464 | 21.65 × 14.43 in | 55.0 × 36.7 cm |
| 200 | 5,196 × 3,464 | 25.98 × 17.32 in | 66.0 × 44.0 cm |
| 150 | 5,196 × 3,464 | 34.64 × 23.09 in | 88.0 × 58.7 cm |
4:3
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 4,899 × 3,674 | 16.33 × 12.25 in | 41.5 × 31.1 cm |
| 240 | 4,899 × 3,674 | 20.41 × 15.31 in | 51.8 × 38.9 cm |
| 200 | 4,899 × 3,674 | 24.50 × 18.37 in | 62.2 × 46.7 cm |
| 150 | 4,899 × 3,674 | 32.66 × 24.49 in | 83.0 × 62.2 cm |
1:1
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 4,243 × 4,243 | 14.14 × 14.14 in | 35.9 × 35.9 cm |
| 240 | 4,243 × 4,243 | 17.68 × 17.68 in | 44.9 × 44.9 cm |
| 200 | 4,243 × 4,243 | 21.21 × 21.21 in | 53.9 × 53.9 cm |
| 150 | 4,243 × 4,243 | 28.29 × 28.29 in | 71.8 × 71.8 cm |
16:9
| DPI | Pixels (approx) | Inches | Centimeters |
|---|
| 300 | 5,657 × 3,182 | 18.86 × 10.61 in | 47.9 × 26.9 cm |
| 240 | 5,657 × 3,182 | 23.57 × 13.26 in | 59.9 × 33.7 cm |
| 200 | 5,657 × 3,182 | 28.29 × 15.91 in | 71.8 × 40.4 cm |
| 150 | 5,657 × 3,182 | 37.71 × 21.21 in | 95.8 × 53.9 cm |
How we calculate this
- Convert 18 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.