Unit converters

MM to Pixels

Convert millimeters to pixels at any DPI or PPI for print artwork, paper sizes, labels, stickers, and layout exports.

Last checked: 2026-05-01

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Tool summary

Pixels = millimeters / 25.4 x DPI. At 300 DPI, 210 mm equals about 2480 px.

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

Interactive tool

MM to Pixels

Convert millimeter measurements into pixels for paper sizes, print artwork, labels, stickers, packaging, and layout exports.

Formula pixels = millimeters / 25.4 x DPI

Example	Input	Result
A4 width at 300 DPI	210 mm	2480 px
3 mm bleed at 300 DPI	3 mm	35 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 MM to Pixels in your sizing workflow

Convert millimeter measurements into pixels for paper sizes, print artwork, labels, stickers, packaging, and layout exports.

InputMillimeters

OutputPixels

Best beforeCanvas setup or export

StateBrowser-based calculation

Use this converter when a print spec gives physical dimensions in millimeters but your design app needs pixels. Enter the millimeter value and the target DPI or PPI, then copy the rounded pixel result for your canvas or export settings.

Related pages and tools

tool CM to Pixels tool DPI Calculator reference A4 paper size reference Print 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. 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. CM to Pixels Convert centimeters to pixels at any DPI or PPI for print layouts, photos, posters, flyers, and design exports.

FAQ

Common questions

How do I convert mm to pixels?

Divide millimeters by 25.4 to get inches, then multiply by the DPI or PPI value.

Why does DPI matter for mm to pixels?

Millimeters describe physical size. DPI or PPI tells you how many pixels should fit into each inch of that physical size.

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