Free tool

Canvas Size Calculator

Drop in a photo or its pixel dimensions and get the largest canvas it can support — rated by real print DPI, instantly.

Instant · runs in your browser

Check your photo’s print size

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photo
Optional: drop your photo
Browse canvas portraits made for these sizes →

How the print size calculator works

Print sharpness is pixels divided by inches. 300 DPI is gallery-grade, 150 DPI looks crisp at arm’s length, and below 100 DPI edges visibly soften. The calculator takes your photo’s resolution for canvas printing, fits it to each standard 2:3 canvas size, and rates the result — including the crop that cover-fitting a canvas implies, which naive calculators ignore.

Everything runs in your browser. If you drop a photo file, only its width and height are read — the image itself goes nowhere.

Choosing the best canvas size for a photo

Bigger is not automatically better: a 24×36" canvas viewed across a living room tolerates 100 DPI happily, while a 8×12" desk piece gets inspected up close and deserves 250+. Factor in viewing distance, then let the table below tell you what your pixels can honestly deliver. And if the photo is destined to become AI portrait art, resolution matters less — generated artwork is rendered at print resolution regardless of your input.

How it works

  1. Drop your photo on the circle (dimensions are read locally), or type its pixel width and height.
  2. Read the instant DPI rating for every standard canvas size.
  3. Pick the size where quality and wall-presence meet — then create something for it.

Frequently asked questions

What resolution do I need for canvas printing?

Aim for 150+ DPI at your chosen size: for a 16×24 inch canvas that means roughly 2400×3600 pixels. 100–150 DPI remains acceptable for large pieces viewed from a distance.

Where do I find my photo’s pixel dimensions?

Easiest: drop the file on this page and we read them locally. Otherwise — file Properties/Details on Windows, Get Info on Mac, or the info panel in any photos app.

Why do you only list 2:3 canvas sizes?

PortraitGift artwork is produced at a 2:3 portrait ratio (1024×1536 generation, printed to matching canvases), so those are the sizes you can actually order. The DPI math shown transfers to any printer’s size chart.

Does my photo resolution matter for an AI portrait?

Far less than for direct printing. Generated portraits are rendered at print resolution from scratch — your photo only needs enough detail for a clear likeness, roughly 800 pixels across the face.

Explore all custom portrait styles →

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