A4 Pixels at Any DPI Calculator

What size is A4 in pixels?

A4 has no single pixel size because pixels depend on the intended print resolution. At 300 DPI, practical A4 dimensions are 2,480 × 3,508 pixels in portrait or 3,508 × 2,480 in landscape. The calculator accepts 30 through 2,400 DPI, including decimal values with up to two places.

A4 dimensions in millimeters, centimeters, and inches

ISO 216 defines A4 as 210 × 297 millimeters, equivalent to 21.0 × 29.7 centimeters and approximately 8.2677 × 11.6929 inches. Pixel density changes the pixel dimensions, not this physical sheet size. A-series paper has a theoretical aspect ratio of 1:√2, approximately 1:1.4142, but this calculator uses the standardized A4 millimeter dimensions directly.

How to calculate A4 pixels from DPI

Divide each millimeter edge by 25.4 to convert it to inches, then multiply by the target pixels per inch. Width is 210 ÷ 25.4 × DPI and height is 297 ÷ 25.4 × DPI. The full theoretical values are retained until each edge is rounded to the nearest whole pixel.

The physical A4 size often produces fractional theoretical pixel values, so practical dimensions are rounded to the nearest whole pixel. Both edges are neither automatically floored nor automatically rounded upward.

A4 at 72, 96, 150, 200, 240, 300, and 600 DPI

Common practical portrait dimensions are 595 × 842 pixels at 72 DPI, 794 × 1,123 at 96 DPI, 1,240 × 1,754 at 150 DPI, 1,654 × 2,339 at 200 DPI, 1,984 × 2,806 at 240 DPI, 2,480 × 3,508 at 300 DPI, and 4,961 × 7,016 at 600 DPI. The calculator’s reference table applies the same exact conversion and nearest-pixel rounding to every row.

As broad context, 72–96 DPI is usually associated more with screen or layout reference than detailed print production; 150 DPI can be usable for some larger or less closely viewed prints; 200–240 DPI is often suitable for general print use; 300 DPI is a common high-detail target; and 600 DPI appears in some high-resolution print or scan workflows. Results still depend on source quality, printer, paper, viewing distance, sharpening, compression, and artwork type.

Why A4 at 300 DPI is 2480 × 3508 pixels

A4 is defined in millimeters rather than pixels. Its 210 mm and 297 mm edges do not convert to exact whole-inch values. At 300 DPI, the theoretical dimensions are approximately 2,480.31496063 × 3,507.87401575 pixels. Nearest-whole-pixel rounding produces the commonly used 2,480 × 3,508 pixel dimensions.

Portrait versus landscape A4

Portrait places the short edge first: 210 × 297 mm. Landscape swaps the display order to 297 × 210 mm. The underlying physical edges, theoretical values, practical total pixel count, and megapixel count do not change.

To fill A4 at the selected DPI without upscaling, a source image generally needs at least the calculated dimensions and the same aspect ratio, or it must be cropped appropriately. Source-image comparisons belong in the related Image Fit on A4 or Letter Calculator and Image Print Size Checker.

DPI versus PPI

DPI technically describes printer dots, while PPI describes source image pixels per printed inch. “DPI” remains common search and interface language for print planning. This calculator interprets the entered DPI number as the desired number of source pixels per printed inch; it does not claim the physical concepts are identical.

Worked examples

Frequently asked questions