Resumen
A3 paper measures 297 × 420 mm, or about 11.69 × 16.54 inches. It is exactly twice the area of A4, which makes it useful for posters, wall charts, diagrams, and proof sheets that need more room than a standard office page.
A3 is close to US 11×17 Tabloid, but it is not interchangeable. Use the exact page size in your PDF and print at 100 percent scale so metric grids, margins, and labels do not drift.
Plantillas imprimibles y hubs
Usa estas páginas imprimibles como los destinos internos más cercanos para este tamaño, flujo de trabajo relacionado o intención de diseño.
Papel cuadriculado 10 mm
Papel cuadriculado 10 mm para mates elementales y gráficos simples
A4 Grid 5mm
A4 5mm grid, common for STEM notes
Papel contable
Cuadrícula en columnas para contabilidad y libro mayor
Graph & grid paper
Quarter-inch grids, engineering paper, coordinate planes, and specialty math layouts.
other paper
Explora plantillas imprimibles y filtros relacionados para este grupo de tamaños.
Artículos de apoyo
A3 Paper Size in Inches: 11.69 x 16.54 in (297 x 420 mm)
A3 paper measures 11.69 x 16.54 inches, or 297 x 420 mm. Compare A3 vs A4 and 11x17, then print posters, charts, and proofs without scaling.
A3 vs A4 Paper: Size, Printing, and Which to Choose
A3 is 297 x 420 mm, exactly twice the area of A4. Compare A3 vs A4, choose the right size, and avoid print scaling mistakes.
Paper Sizes: ISO vs ANSI, Letter, Legal, A4, and 11x17
Compare ISO and North American paper sizes: A4, A3, Letter, Legal, Tabloid, Ledger, and 11x17. Choose the right size before exporting PDFs.
Preguntas frecuentes
What is A3 paper size in inches?OPEN
A3 paper is about 11.69 × 16.54 inches.
What is A3 paper size in millimeters?OPEN
A3 paper is 297 × 420 mm.
Is A3 the same as 11x17?OPEN
No. A3 is 297 × 420 mm, while 11x17 Tabloid is 279.4 × 431.8 mm. They are close enough to confuse, but not interchangeable for scale-sensitive printables.