Formula: Width px = 353 × (DPI ÷ 25.4) • Height px = 500 × (DPI ÷ 25.4)
Note: B3 is commonly used for posters, brochures, and medium-format printing.
B3 Paper Size in Pixels — Complete Guide to B-Series Dimensions
Understanding the exact pixel dimensions of B3 paper is essential for designers, printers, and professionals working with medium-format printing. B3 is a versatile B-series paper size, ideal for posters, brochures, and various professional printing applications. This comprehensive guide covers everything you need to know about B3 size in pixels.
📐 What is B3 Paper Size?
B3 is a standard paper size defined by the ISO 216 international standard for B-series paper. It measures 353 × 500 mm (13.90 × 19.69 inches). B3 is commonly used for:
- Posters and promotional materials — Medium-sized posters and advertising displays
- Brochures and catalogs — Professional marketing materials and product catalogs
- Art prints and photography — Fine art reproductions and photo prints
- Magazines and books — Large-format publications and coffee table books
- Architectural drawings — Detailed plans and technical drawings
The B3 size is part of the B-series paper sizes, where each size is half the previous one. B3 is half of B2 and twice the size of B4. The B-series was designed to provide sizes between A-series sizes, with B3 sitting between A3 and A4 in practical application.
📊 B-Series vs A-Series
B3 vs A3: B3 (353 × 500 mm) is larger than A3 (297 × 420 mm). B-series sizes are geometric means between A-series sizes, making them ideal for applications that require sizes between standard A sizes.
Key difference: B3 is approximately 1.19 times larger than A3 in each dimension, providing a perfect middle-ground between A3 and A4.
📊 B3 Size in Pixels at Common Resolutions
The pixel dimensions of B3 depend entirely on the resolution (DPI/PPI). Here's a quick reference for common DPI values:
| Resolution (DPI) | Width (px) | Height (px) | Total Pixels | Use Case |
|---|---|---|---|---|
| 72 DPI | 1,001 | 1,417 | 1.4 MP | Web display / Screen |
| 96 DPI | 1,334 | 1,890 | 2.5 MP | Standard screen |
| 150 DPI | 2,083 | 2,953 | 6.2 MP | Low-quality print |
| 200 DPI | 2,780 | 3,937 | 10.9 MP | Basic print quality |
| 250 DPI | 3,474 | 4,921 | 17.1 MP | Good print quality |
| 300 DPI | 4,169 | 5,906 | 24.6 MP | Professional print |
| 400 DPI | 5,559 | 7,874 | 43.8 MP | Premium print |
| 600 DPI | 8,339 | 11,811 | 98.5 MP | Professional photography |
| 1200 DPI | 16,677 | 23,622 | 394.0 MP | High-resolution scanning |
🧮 How to Calculate B3 Size in Pixels
The formula to convert B3 paper size (353 × 500 mm) to pixels is simple:
🔢 Conversion Formula
Width in pixels: Width (px) = 353 × (DPI ÷ 25.4)
Height in pixels: Height (px) = 500 × (DPI ÷ 25.4)
Total pixels (megapixels): MP = (Width × Height) ÷ 1,000,000
Example: At 300 DPI: Width = 353 × (300 ÷ 25.4) = 4,169 px | Height = 500 × (300 ÷ 25.4) = 5,906 px
The constant 25.4 is the number of millimeters in one inch, which converts mm to inches before multiplying by the DPI value.
📄 B-Series Paper Sizes Comparison
Understanding how B3 compares to other B-series sizes helps you choose the right format for your project:
📊 B-Series Sizes
B0: 1000 × 1414 mm (39.4 × 55.7 in)
B1: 707 × 1000 mm (27.8 × 39.4 in)
B2: 500 × 707 mm (19.7 × 27.8 in)
B3: 353 × 500 mm (13.9 × 19.7 in)
B4: 250 × 353 mm (9.8 × 13.9 in)
B5: 176 × 250 mm (6.9 × 9.8 in)
B6: 125 × 176 mm (4.9 × 6.9 in)
B7: 88 × 125 mm (3.5 × 4.9 in)
📊 A-Series vs B-Series
A2: 420 × 594 mm (16.5 × 23.4 in)
B3: 353 × 500 mm (13.9 × 19.7 in)
A3: 297 × 420 mm (11.7 × 16.5 in)
B4: 250 × 353 mm (9.8 × 13.9 in)
A4: 210 × 297 mm (8.3 × 11.7 in)
B5: 176 × 250 mm (6.9 × 9.8 in)
A5: 148 × 210 mm (5.8 × 8.3 in)
🖨️ B3 Size for Printing — Resolution Recommendations
Choosing the right resolution for printing B3 depends on viewing distance and print quality requirements:
Posters (Viewing Distance: 1-2m)
Recommended: 150-200 DPI
At 150 DPI: 2,083 × 2,953 px
At 200 DPI: 2,780 × 3,937 px
Perfect for advertising posters and trade show displays.
Brochures & Catalogs (Viewing Distance: 0.3-0.5m)
Recommended: 250-300 DPI
At 250 DPI: 3,474 × 4,921 px
At 300 DPI: 4,169 × 5,906 px
Ideal for professional marketing materials and product catalogs.
Digital Display / Web
Recommended: 72-96 DPI
At 72 DPI: 1,001 × 1,417 px
At 96 DPI: 1,334 × 1,890 px
Suitable for digital signage and presentations.
High-Resolution Scanning
Recommended: 600-1200 DPI
At 600 DPI: 8,339 × 11,811 px
At 1200 DPI: 16,677 × 23,622 px
Used for archival scanning and museum-quality reproductions.
📊 B3 Size in Different Units
🔄 How to Use This B3 Pixel Size Tool
- Enter the resolution in DPI (dots per inch) or PPI (pixels per inch) in the input field.
- Click "Calculate" or press Enter to get instant pixel dimensions.
- View all results: The tool shows width, height, total megapixels, and the paper size.
- Use the reference table for quick lookups at common resolutions.
- Share our tool with fellow designers, printers, or anyone working with B3 paper size.
❓ Frequently Asked Questions
A: At 300 DPI, B3 measures 4,169 × 5,906 pixels (24.6 megapixels). This is the standard resolution for professional quality printing.
A: At 150 DPI, B3 measures 2,083 × 2,953 pixels (6.2 megapixels). This is suitable for posters viewed from a distance.
A: For professional print quality, use 300 DPI (4,169 × 5,906 px). For posters and marketing materials, 250 DPI is often sufficient.
A: Yes, B3 (353 × 500 mm) is larger than A3 (297 × 420 mm). B3 is approximately 1.19 times larger in each dimension.
A: B3 has an aspect ratio of 1:√2 (approximately 1:1.414). This is the standard aspect ratio for all B-series paper sizes.
A: B3 at 300 DPI is 4,169 × 5,906 = 24,622,114 pixels, or approximately 24.6 megapixels.
A: B3 paper size is 353 × 500 millimeters, or 35.3 × 50.0 centimeters.
A: Yes, B3 (353 × 500 mm) is commonly used for professional brochures, catalogs, and marketing materials. It's larger than A4 but more compact than A3.
📈 Common Misconceptions About B-Series Paper Sizes
- Misconception: "B3 has a fixed pixel size" — Fact: Pixel size depends entirely on DPI/PPI. B3 is always 353 × 500 mm, but pixel dimensions vary with resolution.
- Misconception: "B3 is the same as A3" — Fact: B3 is larger than A3. B3 is 353 × 500 mm, while A3 is 297 × 420 mm.
- Misconception: "B-series is just larger A-series" — Fact: B-series sizes are geometric means between A-series sizes, creating a different scaling system.
- Misconception: "Higher DPI always means better quality" — Fact: For medium-format prints, 300 DPI is often the sweet spot for quality and file size.
📡 Pro Design Tip: B3 Print Preparation
When preparing files for B3 printing, follow these professional guidelines:
- Resolution: 300 DPI for high-quality prints (4,169 × 5,906 px)
- Bleed: Add 5-10 mm bleed around all edges for professional results
- Color Mode: CMYK for print, RGB for digital display
- File Format: PDF/X-1a or TIFF for best print quality
- Sharpening: Apply moderate sharpening for medium-format output
- Total File Size: At 300 DPI, file sizes typically range from 20-50 MB (uncompressed TIFF)
📊 Understanding B-Series Paper Sizes
The B-series paper sizes are designed to provide intermediate sizes between A-series sizes:
- Origins: The B-series was developed to complement the A-series, providing sizes that are geometric means between A sizes.
- Mathematical basis: Each B size is the geometric mean of the adjacent A sizes. For example, B3 is the geometric mean of A3 and A4.
- Usage: B-series is commonly used for posters, books, brochures, and envelopes that need sizes between A sizes.
- International standard: ISO 216 defines both A and B series, with B3 being a popular choice for medium-format printing.
🔄 Common B3 Size Use Cases
- 📰 Posters: B3 is perfect for medium-sized posters used in retail, events, and advertising.
- 📋 Brochures: B3 is commonly used for professional brochures and marketing materials.
- 🖼️ Art Prints: Photographers and artists often use B3 for gallery-quality prints.
- 📚 Magazines: B3 is used for large-format magazines and coffee table books.
- 📐 Architectural Drawings: B3 is a standard size for detailed plans and technical drawings.
- 📊 Presentations: B3 is often used for presentation boards and visual aids.
📈 Future of Medium-Format Printing
As printing technology continues to evolve, B3 remains a versatile standard size:
- Digital Printing: B3 is now commonly printed on digital printing presses
- Sustainable Materials: B3 is increasingly available in eco-friendly paper options
- Custom Printing: B3 continues to be a versatile size for personalized printed products
- Variable Data Printing: B3 is ideal for personalized marketing materials
- Augmented Reality: B3 printed markers are used in AR applications
🎓 Educational Resources and Further Reading
- Explore our complete suite of paper size converters
- B2 Size in Pixels
- B4 Size in Pixels
- Paper Size Converter
- DPI Calculator
- Read our blog for more design and printing tips
Last updated: January 2026. Our B3 size in pixels tool is regularly reviewed for accuracy and performance.