Check your image's DPI and real print size
See your image's pixel dimensions, embedded DPI metadata and megapixels, then find out how large it can actually print at 72–300 DPI — with honest quality ratings instead of wishful thinking. Analyzed locally, nothing uploaded.
or drag & drop an image here, or paste from your clipboard
PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, HEIC, SVG
Your images are processed on your device and are not uploaded to PNGful.
How it works
- 1
Add your image
Drop in the photo you're thinking of printing. It's analyzed on your device and never uploaded.
- 2
Read the facts
Pixel dimensions, megapixels, and any DPI metadata embedded in the file (PNG pHYs or JPEG JFIF density) are shown up front.
- 3
Check the print-size table
See the maximum print dimensions at 72, 150, 200 and 300 DPI, each with an honest quality rating for how it will look on paper.
- 4
Test your target size
Enter the exact print size you want — say 8 × 10 inches — and the calculator shows the effective DPI your pixels deliver at that size.
Common uses
- Checking if a photo can print as an 8×10 before ordering
- Verifying scan resolution meets a publisher's requirements
- Sizing images for posters, flyers and brochures
- Understanding why a print came back blurry
- Checking phone photos before canvas or large-format printing
- Confirming an image meets a print shop's 300 DPI request
DPI metadata doesn't add detail — pixels do
An image file contains a fixed grid of pixels, and optionally a small metadata note (PNG's pHYs chunk or the JFIF density field in JPEGs) suggesting how densely to print them. Changing that note — from 72 to 300, for example — rewrites the suggestion without touching a single pixel. The image contains exactly as much detail afterwards as before.
That's why 'changing the DPI' of a file is never upscaling, no matter how a tool markets it. A 1200 × 1500 px photo prints sharply at 4 × 5 inches (300 DPI) and softly at 8 × 10 inches (150 DPI), and no metadata edit changes that arithmetic. Tools that claim to 'convert your image to 300 DPI' by editing the header only change which print size the file suggests by default.
The only honest ways to print larger are more pixels from the source — a higher-resolution photo, a better scan — or accepting a lower effective DPI, which this tool rates candidly so you know what to expect on paper.
Good to know
- Quality ratings are guidelines based on standard viewing distances — a 150 DPI poster viewed across a room looks better than the same rating suggests for a handheld print.
- Many images, especially screenshots and web downloads, carry no DPI metadata at all; that's normal and doesn't affect the print-size math, which needs only pixels.
- This tool analyzes and calculates — it doesn't resample your image. Pair it with the resize tool if you need to change actual pixel dimensions.
- Print results also depend on paper, printer and sharpening, which no calculator can see; DPI math is the reliable first gate, not the whole story.
Your images stay private
Your images are processed on your device and are not uploaded to PNGful.All processing happens locally using your browser's own image engine — there is no upload step, no server-side queue, and nothing to delete afterwards. Read more in our privacy policy.
Frequently asked questions
What DPI do I need for printing?
300 DPI is the standard for prints viewed up close — photo books, framed photos on a desk, magazine pages. 150 DPI is acceptable for prints viewed at arm's length or further, like posters. Below about 100 DPI, softness becomes obvious at any close distance.
Is DPI the same as PPI?
Colloquially, yes — most people and most software say DPI for both. Strictly, PPI (pixels per inch) describes image pixels mapped onto a print size, while DPI (dots per inch) describes the ink dots a printer physically lays down. When a print shop asks for '300 DPI', they mean 300 PPI, and this tool follows that everyday usage.
My file has no DPI value — is it broken?
No. DPI metadata is optional, and screens ignore it entirely — a 1000 px image displays identically whether it says 72, 300 or nothing. Screenshots and most web images simply omit it. For printing, what matters is pixel dimensions divided by print size, which works fine without any embedded value.
Can I increase DPI to make my image print larger?
Changing the DPI value alone changes nothing about your image — it's a metadata note, not detail. To genuinely print larger you need more pixels from the original source: a higher-resolution export, a rescan at higher settings, or the original camera file instead of a compressed copy. Upscaling algorithms can smooth the enlargement but can't recover detail that was never captured.
Is my photo uploaded to check its DPI?
No. The file is parsed locally in your browser — pixel dimensions come from decoding it on your device and DPI metadata is read directly from the file's bytes. Nothing is transmitted anywhere.
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