Pixels to centimetres
Convert a pixel measurement to centimetres at a given resolution — useful when preparing an image for print at a specific DPI, in metric units.
Result
Length
How to use this calculator
- Enter the pixel measurement.
- Enter the resolution (DPI) you're printing or designing at.
- Read the length in centimetres.
Assumptions
- Pixels only have a physical size once you fix a DPI — the same pixel count prints larger at a lower DPI and smaller at a higher DPI.
Technical details: what the fields mean
- Pixels
pixels - The pixel dimension you're converting, e.g. an image's width.
- Resolution
dpi - Dots (or pixels) per inch — 300 is standard for photo-quality print.
Methodology
Inches = pixels ÷ DPI. Centimetres = inches × 2.54.
Worked example
1800 pixels at 300 DPI
Inputs: pixels=1800, dpi=300
Result: 15.24 cm
Practical guidance
- Use 300 DPI for photo-quality prints viewed up close, and a lower DPI for large posters viewed from a distance.
Common mistakes
- Assuming a pixel count has a fixed physical size — it only does once you specify the DPI you're printing at.
FAQs
How many centimetres is 1800 pixels?
At 300 DPI, about 15.24cm — the physical size depends on the DPI you choose.