1. Enter a value
Type a number in the input field. You can use a period or comma as the decimal separator.
Convert CM to pixels
Convert centimeters to pixels at your chosen DPI. Enter dimensions and DPI to get the pixel count instantly.
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When do you need to convert cm to pixels?
In print design, dimensions are specified in centimeters or inches, but digital images are measured in pixels. The conversion depends on the DPI (dots per inch) resolution: pixels = cm × DPI / 2.54.
Standard print resolution is 300 DPI: 10 cm = 1,181 pixels, 21 cm (A4 width) = 2,480 pixels. Web resolution is typically 72 DPI: 10 cm = 283 pixels.
This converter is essential for preparing images for print, setting up document templates, and calculating the required image resolution for a specific print size.
All calculations run locally in your browser — nothing is sent to any server.
How to use the converter?
2. Read the result
The conversion result appears instantly in the field next to it – no clicking required.3. Copy or reverse
Click Copy result or use the Reverse button to convert in the opposite direction.
When is this converter useful?
Print Preparation
A4 at 300 DPI = 2,480 × 3,508 px. A3 poster = 3,508 × 4,961 px.Web Graphics
Banner 20 × 6 cm at 96 DPI = 756 × 227 px.Social media
Calculate pixel dimensions for graphics with a given physical size.Photo Books
Convert photo book page dimensions (cm) to printer pixel requirements.
What makes this converter different?
Complete privacy
All calculations run locally in your browser. No data is sent to any server.Real-time results
The result updates instantly as you type – no need to click any button.Bidirectional conversion
The Reverse button lets you convert in both directions with one click.Reference table
A ready-made table with commonly converted values and contextual descriptions.
How does cm to pixel conversion work?
The formula is: pixels = cm × DPI / 2.54. DPI means dots per inch, and 1 inch = 2.54 cm.
At 300 DPI: 1 cm = 118.11 pixels. At 72 DPI: 1 cm = 28.35 pixels.
Higher DPI = more pixels per centimeter = sharper print. 300 DPI is the standard for professional print quality.
Practical tips
- 300 DPI (print quality): A4 = 2,480 × 3,508 px, A3 = 3,508 × 4,961 px.
- 150 DPI (large format): A2 poster = 2,480 × 3,508 px.
- 72 DPI (screen): 10 cm = 283 px, 20 cm = 567 px.
- 12 MP camera (4,000 × 3,000 px) prints up to 33.9 × 25.4 cm at 300 DPI.
Common DPI resolutions
| Feature | 300 DPI (print) | 72 DPI (screen) |
|---|---|---|
| 10 cm | 1,181 px | 283 px |
| A4 width (21 cm) | 2,480 px | 595 px |
| A4 height (29.7 cm) | 3,508 px | 842 px |
| Use case | Professional print | Web graphics |
| Quality | Sharp at any size | Screen-only |
300 DPI (print)
- 10 cm
1,181 px - A4 width (21 cm)
2,480 px - A4 height (29.7 cm)
3,508 px - Use case
Professional print - Quality
Sharp at any size
72 DPI (screen)
- 10 cm
283 px - A4 width (21 cm)
595 px - A4 height (29.7 cm)
842 px - Use case
Web graphics - Quality
Screen-only
Convert other units to px
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