Paper size and print calculators
Ten free calculators for everything to do with paper sizes: convert dimensions, identify an unknown size, compare sizes to scale, find copy percentages, convert pixels and inches, work out paper weight and postage, pick the right envelope, count copies per press sheet and add bleed. They all run in your browser, with no sign-up.
Contents of this page
Sizes
- Size converterPick a paper size and get every unit at once: millimetres, centimetres, inches, points and pixels at any resolution, portrait or landscape.
- Size finderEnter width and height and find the closest standard paper size, with the difference in millimetres.
- Size comparisonOverlay up to four paper sizes to scale, for example A4, Letter and C4, and read the differences in millimetres.
- Scaling factorThe percentage to scale A4 to A3, A5 or any other size. Calculator plus the full table from A0 to A10.
Conversion
- Pixels to cmConvert pixels to centimetres and back at any resolution, with tables for 72, 150 and 300 dpi and advice on image size for print.
- Inches to cmOne inch is exactly 2.54 cm. Convert inches to centimetres and back, with a table, fractions like 3/8 inch and common sizes.
Post and print
- Paper weight calculatorWork out the weight of sheets, a stack or a mailing from size, gsm and sheet count, and see the matching Deutsche Post letter class.
- Envelope finderChoose your paper size and fold and get the envelopes that fit, with the spare room in millimetres. Works for A4, A5, A6, Letter and custom sizes.
- Imposition calculatorFind out how many finished pieces fit on a press sheet such as SRA3 or 70 × 100 cm, including bleed and gutter, with a layout sketch.
- Bleed calculatorEnter trim size and bleed to get the document size, safe area and pixel dimensions for your print file.
How the calculators work
All calculations run in your browser. What you type is not sent to our server and not stored. The size data comes from the same checked table that the rest of this website uses. If JavaScript is switched off, every calculator page still shows tables with the most important values.