Paper · DPI · pixels

From paper size to pixels

Labs talk in inches and DPI. Screens talk in pixels. Type the paper, pick 300 DPI (or another), get the integer frame, then resize here. Files stay in this tab.

Paper

Width×Height

DPI

Custom

4×6″ at 300 DPI → 1200×1800 px

4×6″ at 300 DPI is 1200×1800. Same Canvas resample as the homepage — not a print driver, not a PDF.

Drop photos onto the paper size

JPG, PNG, WebP, BMP, GIF. HEIC is rejected — convert first.

Preview

target 1200×1800

Fill crops the overflow to cover the frame. Canvas resample — not lossless JPEG, not AI upscale.

Mode

Output

Quality 0.92

Why a paper page is not the homepage

The homepage already lets you type 1200×1800. Repeating that box on a second URL would be the same tool with a different title. This route starts one step earlier: physical size × dots per inch. A 4×6″ print at 300 DPI is 1200×1800. The same 4×6″ at 150 DPI is 600×900 — a draft, not a lab file. Instagram does not care about DPI. A photo lab does.

After the integers exist, Fit calls the same resizeImage the homepage uses. Fill still center-crops. Fit still pads. Stretch still distorts. There is no second encoder, no pica, no print driver.

What this page will not do

It will not assemble a PDF, impose crop marks, or talk to a printer. That is Folio or your OS. It will not lay out a QR sheet. It will not invent pixels a small phone photo does not have — an Upscaled badge still means interpolation. Long edge still caps at 8192, scaled as a pair so A4 does not warp if you punch DPI too high.

Social frames live on the homepage and the preset table. How to click the resizer: guide.

Straight answers

Is 4×6 inches at 300 DPI really 1200×1800 pixels?+

Yes. Inches × DPI = pixels. 4 × 300 = 1200, 6 × 300 = 1800. Centimetres divide by 2.54 first: 10×15 cm at 300 DPI is 1181×1772. Fit then runs the same Canvas resample as the homepage at those integers.

Does this print the photo on paper?+

No. There is no printer dialog, no ICC profile, no bleed, and no PDF page. You get a raster at lab pixel count. Send that file to a lab or to your OS print dialog yourself.

Why not type 1200×1800 on the homepage?+

You can. The homepage already has exact width × height. This page exists for people who think in paper and DPI, not in pixels. The encoder is the same function. There is no second /exact route on purpose — that would duplicate the root tool.