Paper Size Comparison
Compare A, B, Letter, Legal, and custom sizes, and see whether they fit for printing.
The scale is the one to type in the print dialog so the whole page fits without cropping. Printer margins are not counted.
Your result
Choose two sizes. A custom size needs its width and height.
How to use it
- Choose the source and the target.
- If you choose custom, enter the width and the height in millimetres.
- Read the fit scale and the orientation.
Examples
- A4 on LetterSource A4 and target Letter. It does not fit. The needed scale is 94.07 and the orientation is portrait.
- A5 on A4Source A5 and target A4. It fits. The needed scale is 100.00 and the largest is 141.43.
- Custom with no sizeSource custom and no width. No result is shown until the size is complete.
Tool details and privacy
The needed scale is 100 when the size fits and could grow. When it does not fit, it is the shrink. Largest is the biggest uniform scale even when it fits.
A4 on Letter does not fit at 100. A5 on A4 fits, and the largest uniform scale is 141.43, not 100.
Options
- Known sizes are in millimetres. A custom size uses one decimal place, such as 210.5. The best orientation is the larger of the two placements.
Limits
- 100 does not mean the page fills the sheet. Largest is how far it could grow.
- Custom needs a width and a height. Other choices hide those fields.
Privacy
The numbers are calculated in your browser and are not sent to any server.
Questions
Does A4 fit on Letter?
No. The needed scale is 94.07 in portrait.
Why 141 and not 100 for A5?
100 is the needed scale because it fits. 141.43 is the largest uniform enlargement.
Is Letter in millimetres?
Yes. 215.9 by 279.4.
Does it print the page?
No. It only compares the sizes.