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Pixels to Inches Converter

Convert inches to pixels and pixels to inches, cm or mm at any DPI, and find the image size in pixels you need to print at a given size.

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How many pixels are in an inch?

As many as the DPI you print or display at: pixels = inches × DPI. At 300 DPI an inch is 300 pixels, so an 8 × 10 inch print needs 2,400 × 3,000 pixels; at the CSS reference of 96 DPI an inch is 96 pixels.

Cost
Free, no limits
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None — runs on your device
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Works offline
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How to convert inches to pixels

  1. Choose the DPI

    Pick 72, 96, 150, 300 or 600, or type your own.

  2. Enter a length

    In pixels, inches, cm or mm. Every other unit appears at that DPI.

  3. Size a print

    Enter a print width and height in inches or cm to see the pixels needed and the megapixels.

Examples

  • 1,200 px at 300 DPI4 in · 10.16 cm · 101.6 mm

    1,200 ÷ 300 = 4 inches.

  • Print 8 × 10 in at 300 DPI2,400 × 3,000 px (7.2 MP)

    Inches × DPI on each side.

  • Print 10 × 15 cm at 300 DPI1,182 × 1,772 px

    1,181.1 and 1,771.7 rounded up.

Key features of the Pixels to Inches Converter

  • Pixels, inches, centimetres and millimetres in every direction
  • DPI presets of 72, 96, 150, 300 and 600, or any custom value
  • Pixels needed for a print size, rounded up to whole pixels
  • Megapixels for the print size
  • Recalculates as you type

Supported units

Lengths

  • Pixels
  • Inches
  • Centimetres
  • Millimetres

DPI presets

  • 72
  • 96
  • 150
  • 300
  • 600
  • Custom

Print sizing

  • Width × height in inches or cm
  • Pixels needed
  • Megapixels

When should you use this?

  • Checking whether a photo has enough pixels for the print size you want.
  • Setting up a canvas in pixels for a flyer, poster or book cover of a known physical size.
  • Converting a pixel measurement from a screen design into inches or cm at the CSS 96 DPI reference.

Limitations

  • It cannot tell you an image's real-world size without a DPI — that is your choice, not a property of the image.
  • Screen sizes vary: a CSS pixel is 1/96 inch by definition, but physical screen pixels differ by device.
  • Print pixel counts are rounded up, so a centimetre size can come out one pixel larger than some published tables.

Troubleshooting

Every result shows a dash

Check that the DPI is above zero and the value is zero or more.

The print size needs more pixels than my image has

Print smaller, accept a lower DPI (150 can be fine for posters), or use a higher-resolution original.

Common mistakes to avoid

  • Raising the DPI to make an image sharper. It only changes the print size; the pixel count stays the same.
  • Using 72 DPI for print sizing because it is in the file's metadata — at that DPI a print will look soft.
  • Forgetting bleed: printers often need a few millimetres extra on each edge.

Pro tips

Tips for better results

  • Printing

    Ask the printer for DPI and bleed first

    Ask the printer which DPI they want and whether to include bleed before you size anything.

  • Largest print

    Read the inches for your pixel width at 300 DPI

    To find the largest good print from a photo, enter its pixel width at 300 DPI and read the inches.

  • Web

    Use 96 DPI for CSS layouts

    For web layouts, use 96 DPI: that is how browsers relate CSS pixels to inches.

A pixel has no size of its own

An image is a grid of pixels — 3,000 × 2,000, say — and nothing in that grid says how big a pixel is. Size only appears once you decide how many pixels go into an inch: the DPI (dots per inch) or PPI (pixels per inch). At 300 DPI, 3,000 pixels print 10 inches wide; at 150 DPI, the same pixels print 20 inches wide. Changing the DPI setting in an image file changes neither the pixels nor the file's quality, only the size it prints at.

The formulas

Inches = pixels ÷ DPI, and pixels = inches × DPI. One inch is exactly 2.54 cm, or 25.4 mm. So inches to pixels at 300 DPI is a multiplication by 300, and pixels to cm is pixels ÷ DPI × 2.54.

Which DPI to use

300 DPI is the usual figure for photos and print viewed up close; 150 is often enough for posters seen from a distance; 600 is used for line art and detailed scans. 96 is the CSS reference pixel — web browsers treat 96 CSS pixels as one inch — and 72 is an old Mac and Photoshop default that still appears in image metadata. A print shop or publisher may specify its own figure; use that.

Pixels needed for a print

The print-size box multiplies width and height by the DPI and rounds up to whole pixels, so the image always covers the paper. An 8 × 10 inch print at 300 DPI needs 2,400 × 3,000 pixels (7.2 megapixels). In centimetres the division rarely comes out even: A4 (21 × 29.7 cm) at 300 DPI comes to 2,481 × 3,508 pixels here, because 2,480.3 rounds up.

Source

Privacy

The Pixels to Inches Converter runs entirely in your browser. What you enter and the result it produces stay on your own device — nothing is sent anywhere, because nothing needs to be.

You can confirm this rather than take our word for it: open your browser’s developer tools, watch the Network tab, and use the tool. No request carries your input. It also keeps working with the connection off.

Details are in the privacy policy.

More unit converters

What next?

Once you know the pixel size you need.

Resize an image to exact pixels

Pixels to Inches Converter — questions

How do I convert inches to pixels?

Multiply inches by the DPI. At 300 DPI, 4 inches is 1,200 pixels; at 96 DPI it is 384.

How many pixels is an inch?

As many as the DPI you choose. There is no fixed answer: 72, 96, 150, 300 and 600 are all common, and 96 is the CSS reference for screens.

How do I convert pixels to cm?

Divide pixels by the DPI to get inches, then multiply by 2.54. 1,200 pixels at 300 DPI is 4 inches, or 10.16 cm.

What size in pixels do I need to print 8 × 10 inches at 300 DPI?

2,400 × 3,000 pixels, which is 7.2 megapixels. For 4 × 6 inches at 300 DPI you need 1,200 × 1,800.

Does changing an image's DPI make it sharper?

No. DPI is only a print-size instruction. Sharpness comes from the number of pixels; raising the DPI without adding pixels makes the print smaller, not better.

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