18 Inches to Pixels
18 inches is 5,400 pixels at 300 DPI, 2,700 pixels at 150 DPI and 1,728 pixels at the 96 PPI screen standard.
Edit any field to convert a different size at the same resolution.
18 inches in pixels at every common resolution
The pixel count changes with the resolution you are working to — these are the values you are most likely to need.
| Resolution | Pixels | Typical use |
|---|---|---|
| 72 DPI | 1,296 | Legacy web |
| 96 DPI | 1,728 | Screen and CSS |
| 150 DPI | 2,700 | Posters and drafts |
| 300 DPI | 5,400 | Photo and magazine print |
| 600 DPI | 10,800 | Fine art and line work |
How the conversion works
Pixels are found by multiplying the length in inches by the pixel density: pixels = inches × DPI. For 18 inches at 300 DPI that is 18 × 300 = 5,400.
18 inches is a single edge, so the density alone decides the pixel count.
A print at this size is usually seen from half a metre or more, where 150 DPI holds up, which puts it at 5,400 pixels at 300 DPI and 2,700 at 150.
In metric, 18 inches is 45.72 cm or 457.2 mm, and in typographic units it is 1,296 points.
Frequently asked questions
How many pixels is 18 inches?
5,400 pixels at 300 DPI, 2,700 at 150 DPI and 1,728 at the 96 PPI screen standard. Multiply the inches by whichever density you are working to.
How many pixels is 18 inches at 300 DPI?
5,400 pixels. That is the standard density for photographic and magazine printing.
What is 18 inches in centimetres?
45.72 cm, because one inch is exactly 2.54 centimetres.
Does this size really need 300 DPI?
Usually not. Something this size is read from about a metre away, and at that distance 150 to 200 DPI is indistinguishable from 300. That is 2,700 pixels rather than 5,400 — a quarter of the file for no visible loss.
Why does the pixel count change with DPI?
A pixel has no fixed physical size. The DPI value says how many pixels fill one inch, so raising it raises the pixel count needed to cover the same physical space.