Print size and DPI, without a print preview product
Drop a photo or type pixels. See the physical size at 72, 150, and 300 DPI in inches and millimetres. Or work backwards from a print size to the pixels you need. Files never leave this device.
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Drop images anywhere on this page
Optional image. Or type pixel size. Files stay on this device.
Drop a photo or type pixels to see physical size at 72, 150, and 300 DPI.
Pixels needed for a print
Enter the print size you want. We tell you how many pixels that is at the chosen DPI.
When to use this calculator
DPI (dots per inch) is not a magic sharpness switch inside the file. It is a relationship between pixel count and how large you print. A 3000×2000 photo is about 10×6.7 inches at 300 DPI, or much larger and softer at 72 DPI. This page does that arithmetic and, if you want, sends you to Resize with the pixel size filled in.
Use 300 DPI as a rule of thumb for photo prints you will hold. 150 DPI is often enough for a large poster viewed from a few feet. 72 DPI is a screen-era number, not a lab print target. This is not a printer driver, a colour-managed proof, or a bleed/crop-mark tool.
If you already have the print size (say 8×10 inches at 300 DPI), fill the inverse boxes. You will see the pixels required. Then use the resize CTA. After that, compress only if you are emailing the file, not if you are sending it to a lab. For a PDF, use JPG to PDF on ❤️ LoveThisPDF.
An image is optional. You can type width and height without dropping a file. If you do drop a photo, pixels are read on this device. Nothing is uploaded. HEIC from an iPhone is fine in current browsers.
How to do it
- Drop a photo or type its pixel width and height.
- Read the table: physical size at 72, 150, and 300 DPI.
- Or enter a print size and DPI to see required pixels, then open Resize.
Tips
- Upsizing a small photo to 300 DPI at a large print size will not add detail.
- Labs care about pixels and colour. This page only does the size math.
- /dpi is the same calculator.
Related
FAQ
- Does changing DPI in this calculator rewrite the file?
- No. It shows the relationship between pixels and print size. Use Resize if you need a different pixel count.
- What DPI should I use?
- 300 for a photo you will hold. 150 can be fine for a large poster. 72 is not a print target.
- Do you upload the photo?
- No. Pixels are read in this browser. You can also type sizes with no file at all.
- Is /dpi a different tool?
- No. /dpi is the same calculator as this page.