How to Print A3 Documents Online
You can print A3-size documents online by uploading your A3 PDF or image file to an online print service that supports A3. Printster accepts A3-size files — upload your document, select A3 paper size during configuration, choose colour or B&W, and have it delivered to your address anywhere in India.
A3 paper (297 x 420 mm) is twice the area of standard A4 and is the go-to size for engineering drawings, architectural floor plans, large spreadsheets, infographics, posters, and project displays. While A3 printers are available in some offices and large print shops, they are not as ubiquitous as A4 printers — and for people who only occasionally need A3 output, owning or visiting one is impractical. Ordering A3 prints online solves this. You upload the file from home or the office, configure your print settings, and the document arrives at your door in the right size, professionally printed. This guide covers how to prepare an A3 file correctly for online printing, what to watch for, and how to place an order.
Preparing your A3 file correctly
Before uploading, verify that your file is actually set to A3 page size. A common mistake is designing at A4 and assuming the printer will scale up — this produces blurry output because the document resolution was never intended for A3.
In Adobe Acrobat: Document Properties → Page Sizes should show 297 x 420 mm (or 841.9 x 1190.6 pts).
In Microsoft Word / LibreOffice: Page Layout → Page Size → A3. Set margins appropriately (a minimum 10 mm margin on all sides is advisable).
In vector tools (Illustrator, Inkscape, CorelDRAW): Set the artboard to A3. Export as PDF with 'Use document bleed settings' and embed all fonts.
For engineering drawings from AutoCAD or similar: export as PDF directly from the application and choose A3 as the paper size in the plot settings. This preserves vector lines cleanly.
Image resolution for A3 printing
At A3 size, a 300 DPI image requires 3508 x 4961 pixels. If your source image is only 1920 x 1080 (Full HD), it will print at roughly 163 DPI at A3, which is acceptable for viewing from arm's length but will show softness on close inspection. For charts, diagrams, and text-heavy content, use vector graphics (PDF or SVG) rather than raster images to ensure crisp output at any size.
Ordering A3 prints on Printster
- Go to printster.in and click 'Upload'.
- Upload your A3-size PDF, DOCX, or image file.
- In the configure step, select A3 as the paper size (if not auto-detected).
- Choose colour or B&W, and single-sided or duplex.
- Add binding if needed — wiro or spiral binding is popular for multi-sheet A3 architectural or engineering sets.
- Proceed to checkout and pay online (UPI, card, or net banking).
Delivery reaches Delhi NCR in 4–7 working days and the rest of India in 7–10 working days from the next working day after confirmation.
Common use cases for A3 printing
- Engineering and architecture: site plans, detail drawings, structural layouts
- Education: large reference charts, science posters, project displays
- Business: large spreadsheets that don't fit legibly on A4, marketing posters, banners
- Art: digitised artwork or photography prints at a large scale
Upload your file & get an instant price
Frequently asked questions
- Can I upload an A4 file and ask Printster to print it at A3?
- This is possible but not recommended. Scaling an A4 PDF to A3 reduces the effective resolution and may make fonts and images look soft. For best results, export or save your document at A3 page size before uploading.
- Does Printster print A3 in colour?
- Yes. A3 is available in both colour and black & white. Use the online price calculator at printster.in to check current per-page rates for A3 colour and B&W printing.
- Can I get A3 prints bound?
- Yes. Spiral and wiro binding are available for A3 documents, which is common for architectural and engineering drawing sets. Binding adds 1–2 working days to the production time.
- What is the maximum file size I can upload?
- Printster accepts files up to 100 MB directly via the upload page. For larger A3 files (common with high-resolution drawing sets), share via WeTransfer and contact Printster to arrange the order.
- How long does delivery take for A3 prints?
- 4–7 working days within Delhi NCR and 7–10 working days for the rest of India, counted from the next working day after your order is placed.
- Is borderless printing available for A3?
- No. Printster does not offer borderless printing. Keep a minimum margin of 5–10 mm on all sides of your A3 document to avoid content being clipped at the page edge.