B4 to B3 Conversion
B3 is exactly double B4. If you have a B4 design you want to print larger, you can scale it up to B3 by 141% (the inverse of the 70.7% reduction).
B4 (Original)
B4
250 × 353 mm
9.8 × 13.9 in
9.8 × 13.9 in
B3 (Enlarged)
B3
353 × 500 mm
13.9 × 19.7 in
13.9 × 19.7 in
📊 B4 → B3 Quick Facts:
• Scale Up: 141.4%
• Ratio: B3 = 2 × B4
• Enlarge Factor: Multiply dimensions by √2
• Uses: B3 for newspapers, posters, larger books
• Scale Up: 141.4%
• Ratio: B3 = 2 × B4
• Enlarge Factor: Multiply dimensions by √2
• Uses: B3 for newspapers, posters, larger books
📏 Complete Dimensions
| Unit | B4 | B3 |
|---|---|---|
| Millimetres | 250 × 353 mm | 353 × 500 mm |
| Centimetres | 25.0 × 35.3 cm | 35.3 × 50.0 cm |
| Inches | 9.8 × 13.9 in | 13.9 × 19.7 in |
| Pixels @ 72 DPI | 709 × 1001 px | 1001 × 1417 px |
| Pixels @ 300 DPI | 2953 × 4169 px | 4169 × 5906 px |
| Pixels @ 600 DPI | 5906 × 8339 px | 8339 × 11811 px |
🎨 Common Uses
- B4: Newspapers, larger books, technical brochures
- B3: Posters, larger newspapers, wall charts
🔁 Related Conversions
- B4 to B5 – Half size
- B3 to B4 – Reverse conversion
- B3 to B2 – Double size
- B-Series Hub – All B-series sizes
❓ Frequently Asked Questions
Is B3 double B4? Yes — B3 is exactly double the area of B4.
How do I enlarge B4 to B3? Set your printer or software to 141% scale.