A Paper Size to PX

Tool Introduction

"A Paper Size to PX" is a professional online tool designed to help designers, developers, printing professionals, and any user who needs to accurately calculate paper pixel dimensions. It can precisely calculate and convert the physical dimensions of A-series paper (from A0 to A13), as defined in the international standard ISO 216, into corresponding pixel (PX) width and height, based on your set DPI (dots per inch) or PPI (pixels per inch) value. Whether for web design, image processing, screen adaptation, or preparing print output, this tool provides reliable pixel dimension references.

How to Use

1. Select Paper Size: From the "Paper Size" dropdown menu, choose the A-series paper specification you need to convert, for example, "A4".
2. Set DPI/PPI: In the "DPI/PPI" input box, enter or adjust the DPI/PPI value. The default value is 96, but you can modify it according to your actual needs (e.g., 300 DPI for high-quality printing).
3. View Conversion Results: The tool will automatically calculate and display the "Width" and "Height" of the paper in pixels (PX) at the specified DPI, based on your selected paper size and DPI/PPI value.

Input Parameter Description:

• Paper Size (size): Required. You need to select a specific A-series paper specification from the preset options A0 to A13.
• DPI/PPI (dpi): Required. Enter a positive integer representing the number of dots or pixels per inch. The default value is 96, which is a common screen DPI value.

Output Result Format:

• Width (width): Read-only field. Displays the calculated paper width in PX (pixels).
• Height (height): Read-only field. Displays the calculated paper height in PX (pixels).

Usage Example

Scenario: Convert an A4 paper size to pixel dimensions at standard screen DPI (96 DPI) for web design or image presets.

• Example Input Data:
  • Paper Size: A4
  • DPI/PPI: 96
• Expected Output Results:
  • Width: 794 PX
  • Height: 1123 PX
• Specific Operation Demonstration:
  1. In the tool interface, select "A4" from the "Paper Size" dropdown menu.
  2. In the "DPI/PPI" input box, keep or enter the default value "96".
  3. The tool will immediately calculate and display the pixel dimensions of A4 paper at 96 DPI: width "794 PX" and height "1123 PX".

Frequently Asked Questions

• Q: What are the physical dimensions of A-series paper sizes?
  A: A-series paper sizes follow the international standard ISO 216. For example, A4 size is 210 mm × 297 mm. The long side of each A-series size is approximately equal to the short side of the next smaller size, and its area is half. All calculations in this tool are based on these standard physical dimensions.
• Q: What is the difference between DPI and PPI in this tool?
  A: DPI (Dots Per Inch) is typically used to describe printer resolution, while PPI (Pixels Per Inch) is often used to describe screen display density. In this tool, the DPI/PPI field refers to the number of dots or pixels per inch that affects the conversion density from physical dimensions to pixels. The higher the value, the larger the converted pixel dimensions.
• Q: Why are there no A14, A15, etc., options between A0-A13?
  A: The international ISO 216 standard typically defines up to A10. This tool specifically extends the supported range to A13 to provide more flexible and comprehensive options, meeting certain specific or small paper size conversion needs. The larger the A-series number, the smaller the paper area.

Notes

• Please ensure that the DPI/PPI value you enter is a positive integer. The higher the DPI value set, the larger the converted pixel width and height, and the image will have higher clarity at the same physical size.
• This tool converts physical dimensions of A-series paper sizes according to the international ISO 216 standard.
• The output pixel values are precisely calculated and rounded results, which may have slight deviations due to floating-point operations, but the accuracy is completely sufficient for most design and printing application scenarios.
• When performing printing or high-precision image processing, be sure to set the input value according to the actual printer or display device DPI requirements.