Choose the paper format
Select A4, A3, A5, Letter, or Legal and review its canonical millimetre or inch base.
Standards first, pixels second
Start with the real sheet size.
PaperSize keeps the source dimensions visible: ISO A-series sizes use their stated integer millimetres, while Letter and Legal use exact inch bases. Choose a PPI value to calculate a whole-pixel canvas with the rounding shown. Nothing is uploaded, resized, or stored.
Free · No signup · No image upload
Three explicit choices
From standard sheet to pixel canvas
Set the image PPI
PPI links pixels to physical inches. PaperSize does not assume one density is right for every printer or viewing distance.
Review and copy the result
See the formula, unrounded values, nearest whole pixels, and portrait or landscape order before copying.
Five finite references
Use the named format, not a guessed canvas
- A4, A3, and A5 keep their ISO integer-millimetre dimensions visible before conversion.
- Letter and Legal start from exact inch dimensions instead of rounded metric substitutes.
- The A4-versus-Letter comparison explains why equal-looking office pages can still crop or reflow.
Ready to calculate
Choose the sheet, then choose the density.
Open the calculator to compare physical units and calculate a transparent nearest-pixel result without uploading an image.