Paper-size converter
Look up a standard paper size's dimensions in millimetres and inches — A-series, US Letter, Legal and Tabloid.
Result
Width
Height
Width
Height
How to use this calculator
- Choose a paper size.
- Read its dimensions in millimetres and inches.
Assumptions
- Uses the standard published dimensions for each size — some printers/trimmers have very small tolerances that can differ by a millimetre or two.
Technical details: what the fields mean
- Paper size
paperSize - A standard paper size — A4 and A3 are common in most of the world; Letter and Legal are standard in the US and Canada.
Methodology
Looks up the standard dimensions for the chosen paper size from published international (ISO 216) and North American paper standards.
Worked example
A4
Inputs: paperSize=A4
Result: 210.0mm × 297.0mm (8.27in × 11.69in)
Practical guidance
- A-series sizes halve in area each step up (A4 is half of A3, which is half of A2) — useful for scaling a design between sizes.
Common mistakes
- Confusing US Letter (215.9×279.4mm) with A4 (210×297mm) — they're similar but not the same, which can cause printing/formatting issues when a document made for one is printed on the other.
FAQs
What size is A4 paper in inches?
8.27 × 11.69 inches (210 × 297mm).
Is US Letter the same as A4?
No — Letter is 215.9 × 279.4mm, slightly wider and shorter than A4's 210 × 297mm.