A3 ↔ A2 Paper Size Converter
Convert between A3 and A2 paper sizes instantly
📐 Paper Size Comparison
📚 A3 to A2 Paper Size Details
A3 Paper Size
Dimensions: 297 × 420 mm
In inches: 11.7 × 16.5 in
Common uses: Tabloid newspapers, small posters, diagrams
A2 Paper Size
Dimensions: 420 × 594 mm
In inches: 16.5 × 23.4 in
Common uses: Medium posters, architectural drawings, charts
Scale Factor
A2 to A3: 2× larger
A3 to A2: 0.5× smaller
Area ratio: 1 A2 = 2 A3 sheets
ISO 216 Standard
Both A3 and A2 are part of the ISO 216 paper size standard used worldwide except in North America.
Each size is half the size of the next larger size.
📏 How This Converter Works
This converter calculates the relationship between A3 and A2 paper sizes:
- Area Conversion: A2 paper has twice the area of A3 paper
- Linear Scale: A2 dimensions are √2 times larger than A3 dimensions
- Sheet Count: Calculates how many A3 sheets equal a given number of A2 sheets
- Real-time: Updates automatically as you change values
A3 area = 297 mm × 420 mm = 124,740 mm²
A2 area = 420 mm × 594 mm = 249,480 mm²
// Scale Factor:
A2 area ÷ A3 area = 2
Linear scale = √2 ≈ 1.414
// Sheet Conversion:
A3 sheets = A2 sheets × 2
A2 sheets = A3 sheets ÷ 2
📊 A Series Paper Size Chart
| Paper Size | Dimensions (mm) | Dimensions (inches) | Common Uses |
|---|---|---|---|
| A0 | 841 × 1189 mm | 33.1 × 46.8 in | Large posters, technical drawings |
| A1 | 594 × 841 mm | 23.4 × 33.1 in | Posters, flip charts |
| A2 | 420 × 594 mm | 16.5 × 23.4 in | Medium posters, drawings |
| A3 | 297 × 420 mm | 11.7 × 16.5 in | Tabloids, diagrams |
| A4 | 210 × 297 mm | 8.3 × 11.7 in | Standard paper, letters |
| A5 | 148 × 210 mm | 5.8 × 8.3 in | Notebooks, booklets |
🎯 Practical Applications
Printing & Design
Calculate how many A3 sheets you need to print an A2 poster
Determine scaling for printing designs between sizes
Architecture & Engineering
Convert technical drawings between A3 and A2 formats
Plan printing requirements for blueprints
Education & Office
Calculate paper needs for presentations
Plan printing for reports and documents
Cost Calculation
Estimate paper costs when switching sizes
Plan printing budgets for different paper sizes
❓ Frequently Asked Questions
A: Two A3 sheets placed side by side make one A2 sheet. A2 has twice the area of A3.
A: A2 is 1.414 times larger linearly (√2), and 2 times larger in area than A3.
A: Yes, but it will be scaled down to 71% (1/√2) of the original size to fit A3 paper.
A: A-series paper sizes (including A3 and A2) are used worldwide except in the United States, Canada, and some parts of Mexico.