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PixelMeasures

Print setup

DPI Calculator

Calculate DPI or PPI from physical size and pixel width to check print sharpness, canvas setup, and image export quality.

Last checked: 2026-05-01

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

Interactive tool

DPI Calculator

Calculate DPI or PPI from a physical width and pixel width before printing, exporting, or checking image quality.

Formula DPI / PPI = pixels / inches
ExampleInputResult
A4 width 2480 px over 210 mm 300 PPI
4x6 photo width 1200 px over 4 in 300 PPI

Workflow

Use DPI Calculator in your sizing workflow

Calculate DPI or PPI from a physical width and pixel width before printing, exporting, or checking image quality.

InputPhysical width and pixels
OutputDPI / PPI
Best beforeCanvas setup or export
StateBrowser-based calculation
Use the DPI calculator when you know the physical output width and the available pixel width. It is useful before sending artwork to print, checking if a photo has enough resolution, or deciding how large a digital file can be printed.

Related

Related pages and tools

tool MM to Pixels tool Pixels to Inches guide DPI vs PPI reference A4 paper size template Business Card Template Open the matching PixelMeasures template page.

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. 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. 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 calculate DPI?

Convert the physical size to inches, then divide the pixel dimension by that inch value.

Is DPI the same as PPI?

People often use them interchangeably for image planning. PPI describes pixels per inch in an image; DPI is often used in print output contexts.

Is 300 DPI always enough?

It is a strong default for many close-viewed print pieces, but exact requirements depend on printer, material, viewing distance, and artwork type.

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.

Last checked: 2026-05-01