Unit converters

CM to Pixels

Convert centimeters to pixels at any DPI or PPI for print layouts, photos, posters, flyers, and design exports.

Last checked: 2026-05-01

Open tool All tools

Tool summary

Pixels = centimeters x 10 / 25.4 x DPI. At 300 DPI, 21 cm equals about 2480 px.

Last checked: 2026-05-01 Source: Adobe Photoshop image size and resolution Found a spec change? Send correction.

Interactive tool

CM to Pixels

Convert centimeter dimensions into pixels for print layouts, classroom materials, photo exports, and design canvases.

Formula pixels = centimeters x 10 / 25.4 x DPI

Example	Input	Result
A4 width at 300 DPI	21 cm	2480 px
10 cm print at 300 DPI	10 cm	1181 px

JavaScript is required for live calculations and local image export. The formula and examples above remain available so you can use the values in another editor.

Workflow

Use CM to Pixels in your sizing workflow

Convert centimeter dimensions into pixels for print layouts, classroom materials, photo exports, and design canvases.

InputCentimeters

OutputPixels

Best beforeCanvas setup or export

StateBrowser-based calculation

Use the cm to pixels converter when dimensions arrive in centimeters but your output must be a pixel canvas. The calculation first converts centimeters to inches, then multiplies by the DPI or PPI target.

Related pages and tools

tool MM to Pixels tool Pixels to CM tool DPI Calculator reference Photo sizes

Nearby tools

More tools in the PixelMeasures toolkit

Aspect Ratio Calculator Calculate aspect ratio from width and height, including reduced ratio and decimal value for images, videos, banners, and canvases. DPI Calculator Calculate DPI or PPI from physical size and pixel width to check print sharpness, canvas setup, and image export quality. Image Resizer Resize an image locally in the browser using custom pixel dimensions or PixelMeasures presets for platforms, print, and design exports. MM to Pixels Convert millimeters to pixels at any DPI or PPI for print artwork, paper sizes, labels, stickers, and layout exports. Pixels to CM Convert pixels to centimeters using any DPI or PPI to estimate print dimensions and physical output size. Pixels to Inches Convert pixels to inches at any DPI or PPI to estimate print size, output dimensions, and image sharpness. Print Bleed Calculator Calculate print bleed size from trim width, trim height, bleed per side, and DPI for print-ready canvas setup. Social Media Image Resizer Resize images to social media presets for covers, thumbnails, stories, pins, banners, shop assets, and profile graphics.

FAQ

Common questions

How do I convert cm to pixels?

Multiply centimeters by 10 to get millimeters, divide by 25.4 to get inches, then multiply by DPI or PPI.

Is 300 DPI required?

No. 300 DPI is a common close-viewed print target, but drafts, large-format work, and screen-only graphics may use a different value.

Can I share selected tool settings?

Some PixelMeasures tools keep selected presets in the URL fragment, so a shared link can reopen useful choices while the main tool page stays focused.

References

Sources and references

Formula-based conversions use physical unit relationships and image-resolution guidance. PixelMeasures calculates results from the entered measurement and DPI/PPI value.

Adobe Photoshop image size and resolution
Used for pixel dimensions, image resolution, resampling, and print PPI concepts.
W3C CSS Values and Units Module
Used for CSS unit definitions, absolute unit relationships, and CSS px behavior.

Last checked: 2026-05-01