Inches to Pixels Calculator
Convert inches to pixels at any DPI resolution. The formula is pixels = inches x DPI. This tool shows results for common DPI values (72, 96, 150, 300) to help with screen and print design.
How to Convert Inches to Pixels
- Determine the target DPI (96 for screen, 300 for print).
- Multiply the measurement in inches by the DPI.
- The result is the number of pixels needed.
Formula
Pixels = Inches x DPI
Example Calculation
An 8.5 x 11 inch document at 300 DPI:
Width = 8.5 x 300 = 2550 pixels
Height = 11 x 300 = 3300 pixels
This is the standard resolution for a letter-size print at photo quality.
Inches to Pixels Reference Table
| Inches | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|
| 0.5 | 36 | 48 | 75 | 150 |
| 1 | 72 | 96 | 150 | 300 |
| 2 | 144 | 192 | 300 | 600 |
| 3 | 216 | 288 | 450 | 900 |
| 4 | 288 | 384 | 600 | 1200 |
| 5 | 360 | 480 | 750 | 1500 |
| 6 | 432 | 576 | 900 | 1800 |
| 8.5 | 612 | 816 | 1275 | 2550 |
| 11 | 792 | 1056 | 1650 | 3300 |
Frequently Asked Questions
How many pixels is 1 inch?
It depends on DPI. At 96 DPI (standard screen), 1 inch = 96 pixels. At 300 DPI (print), 1 inch = 300 pixels.
What DPI should I use for web images?
For web, DPI does not matter since screens display pixels directly. What matters is the pixel dimensions. However, 72 or 96 DPI is conventional for web images.
What resolution do I need for a 4x6 photo print?
At 300 DPI (photo quality): 4 x 300 = 1200 pixels wide, 6 x 300 = 1800 pixels tall. Minimum recommended: 1200 x 1800 pixels.
What is the difference between DPI and PPI?
DPI (dots per inch) refers to printer output. PPI (pixels per inch) refers to screen display. In practice, they are often used interchangeably for digital-to-physical conversions.
How do I calculate image size for a poster?
For posters viewed from a distance, 150 DPI is usually sufficient. A 24x36 inch poster at 150 DPI needs 3600 x 5400 pixels.