Paper Size Converter
Convert A4, Letter, Legal & 50+ paper sizes to any unit instantly
Select Paper Size
Paper Dimensions
Millimeters (mm)
210 × 297 mm
Centimeters (cm)
21.0 × 29.7 cm
Inches (in)
8.27 × 11.69 in
Pixels (px)
2480 × 3508 px @ 300 DPI
Points (pt)
595 × 842 pt
Aspect Ratio
1:1.414 (√2)
Popular Paper Sizes Quick Reference
| Size | Millimeters | Inches | Pixels (300 DPI) |
|---|---|---|---|
| A4 | 210 × 297 | 8.27 × 11.69 | 2480 × 3508 |
| Letter | 216 × 279 | 8.5 × 11.0 | 2550 × 3300 |
| Legal | 216 × 356 | 8.5 × 14.0 | 2550 × 4200 |
When to Use Paper Size Converter
Print Design Projects
Calculate exact pixel dimensions for brochures, flyers, and marketing materials at various DPI settings for professional printing.
Office Documentation
Ensure consistent formatting across international offices using different paper standards like A4 versus Letter size.
Graphic Design
Create templates and layouts with precise measurements for business cards, postcards, and custom printing formats.
Publishing Industry
Convert between book sizes, magazine formats, and manuscript dimensions for international publishing requirements.
International Business
Navigate different regional paper standards when working with global partners, suppliers, and printing services.
Educational Resources
Create worksheets, textbooks, and educational materials with accurate dimensions for different regional printing standards.
Frequently Asked Questions
What is the difference between A4 and Letter size paper?
A4 paper measures 210 × 297 mm (8.27 × 11.69 inches) and follows the ISO 216 standard used internationally. Letter size measures 216 × 279 mm (8.5 × 11 inches) and is the ANSI standard used primarily in North America. A4 is slightly narrower and taller than Letter size.
How do I calculate paper size dimensions in pixels?
To calculate pixels, multiply the paper dimensions in inches by the DPI (dots per inch). For example, A4 at 300 DPI = 2480 × 3508 pixels. Our calculator automatically converts dimensions to pixels at various DPI settings for print and web design.
What DPI should I use for printing?
For professional printing, use 300 DPI or higher. For everyday office printing, 150-300 DPI is sufficient. For web display, 72-96 DPI works well. Higher DPI produces better quality but larger file sizes.
Is this paper size converter free to use?
Yes, our paper size converter is completely free to use. No registration required. You can convert unlimited paper sizes and get instant dimensions in multiple units without any cost.
Which paper sizes are included in the converter?
Our converter includes 50+ paper sizes: ISO A-series (A0-A10), B-series (B0-B10), C-series (C0-C10), ANSI sizes (Letter, Legal, Tabloid, Ledger), and international formats. All dimensions available in mm, cm, inches, and pixels.
Can I use this tool for professional printing?
Absolutely! Our tool provides precise dimensions suitable for professional printing and design work. It includes pixel calculations at various DPI levels, making it perfect for graphic designers, printers, and print shops.
How accurate are the conversion calculations?
Our calculations are mathematically precise and based on official ISO and ANSI standards. All dimensions are calculated to multiple decimal places and rounded appropriately for practical use in design and printing applications.
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