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PIXELS & RESOLUTION

Paper Size to Pixels Calculator

Select a paper size, choose an orientation and DPI, and instantly see the pixel dimensions needed for printing or design work.

DPI (Dots Per Inch)
Width2,480px
Height3,508px
Physical Size210 × 297mm
Resolution300DPI

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How Paper Size to Pixels Conversion Works

A pixel dimension depends on both the physical paper size and the chosen DPI (dots per inch).The formula is simple: multiply the size in inches by the DPI.

For example, A4 paper is 210 × 297 mm, which equals 8.27 × 11.69 inches. At 300 DPI: 8.27 × 300 = 2,480 pixels wide, 11.69 × 300 = 3,508 pixels tall.

Choosing the Right DPI

  • 72 DPI — Screen resolution. Not suitable for printing.
  • 150 DPI — Acceptable for everyday documents and flyers.
  • 300 DPI — Standard for high-quality printing and photography.
  • 600 DPI — Fine art, detailed line work, and pre-press output.

Higher DPI means more pixels, larger file sizes, and sharper print output. The physical paper size stays the same — DPI only affects the resolution of the image that fills it.

Common Pixel Dimensions at 300 DPI

A4: 2,480 × 3,508 px ·Letter: 2,550 × 3,300 px ·Legal: 2,550 × 4,200 px ·A3: 3,508 × 4,961 px ·A5: 1,748 × 2,480 px

Paper Size to Pixels FAQ

How many pixels is A4 at 300 DPI?
A4 at 300 DPI is 2,480 × 3,508 pixels. This is calculated by converting the A4 dimensions (210 × 297 mm) to inches and multiplying by 300.
What pixel size should I use for printing?
For high-quality printing, use 300 DPI. Multiply the physical size in inches by 300 to get the required pixel dimensions. For example, an 8.5 × 11 inch Letter sheet at 300 DPI needs 2,550 × 3,300 pixels.
How many pixels is Letter paper?
Letter paper (8.5 × 11 inches) at 300 DPI is 2,550 × 3,300 pixels. At 72 DPI (screen resolution) it is 612 × 792 pixels.
What resolution do I need for an A4 print?
For photo-quality A4 printing, aim for 300 DPI (2,480 × 3,508 pixels). For documents and flyers, 150 DPI (1,240 × 1,754 pixels) is often sufficient.
Does changing DPI change the physical paper size?
No. DPI only affects the pixel density — how many dots the printer places per inch. The physical paper dimensions remain the same regardless of DPI. Higher DPI means more pixels are needed to fill the same physical area.
What DPI should I use for printing?
300 DPI is the standard for high-quality print. 150 DPI works for everyday documents. 72 DPI is screen resolution and produces very low quality on paper. For fine art and pre-press, 600 DPI provides maximum sharpness.
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