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Drawing Paper Scale Calculator
Calculate print percentage and the resulting drawing scale when resizing ISO A0–A4 sheets.
GUIDE
How to use Drawing Paper Scale Calculator
Calculate print percentage and the resulting drawing scale when resizing ISO A0–A4 sheets. The tool is available directly in your browser with no account required.
- 1. Enter the required value, text, or file in the tool above.
- 2. Adjust any available options and run the tool when needed.
- 3. Review the result and copy or download it if the tool provides that option.
DETAILS
How paper resizing changes a drawing scale
Each step down in the ISO A paper series reduces linear dimensions to about 70.71%. Moving from A1 to A3 is two steps, so the drawing becomes 50% and a 1:100 scale becomes 1:200.
A1 to A3 example
Print an A1 drawing at 50% to fit A3 proportionally. A 100 mm line becomes 50 mm and an original 1:100 scale becomes 1:200.
Good to know
Disable fit-to-page scaling. Printer margins may introduce a small size difference, so verify a known dimension after printing.
Frequently asked questions
What percentage enlarges A3 to A1?
Two paper-size steps correspond to 200% linear enlargement.
Why is A1 to A4 about 35.36%?
Three reductions multiply the linear factor 0.7071 three times, resulting in about 35.36%.
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