Business Card Size to Pixels Converter: Core Features and Principles

Designers often need to convert physical business card dimensions into digital pixel values, but manual calculations can lead to errors. This tool uses the standard conversion formula (Pixels = Millimeters × DPI ÷ 25.4) to accurately convert the physical size of a business card (in millimeters) into the pixel dimensions required for screen or print. Business card sizes typically refer to standardized physical width and height specifications, such as 90 × 54 mm, while DPI (Dots Per Inch) determines the pixel density within a unit of length.

Why Choose Our Business Card Pixel Converter?

Supports international mainstream business card size presets, covering standard specifications for the US, Europe, Japan, China, and other regions.
Allows custom DPI input (ranging from 72 to 600) to meet the needs of both screen display and high-definition printing.
Calculates in real-time and rounds to the nearest whole number, outputting pixel values ready for immediate use in design software.

How to Use the Tool

Select a preset business card size (e.g., 90 × 54 mm) or manually enter the dimensions in millimeters.
Set the target DPI value (300 is recommended for print, 72 is common for screen display).
Click convert to get the pixel values for width and height.
Copy the results directly into your design software.

Frequently Asked Questions (FAQ)

Q: How many pixels is a 90 × 54 mm business card at 300 DPI?
A: 1063 × 638 pixels. The calculation formula is: 90 × 300 ÷ 25.4 ≈ 1063px, and 54 × 300 ÷ 25.4 ≈ 638px.

Q: What is the difference in DPI requirements for print and screen display?
A: Printing requires a high DPI (300+) to ensure sharpness, while 72-96 DPI is sufficient for screen display. An excessively high DPI will generate unnecessarily large files, so choose based on your actual use case.

Important Notes

The input millimeter value must be greater than 0, and the recommended DPI range is between 72 and 600. The results do not account for bleed areas; please confirm the actual specifications with your printer before printing. This tool does not store any input data, making it safe for processing commercial design files.

Technical Notes & Usage Tips

We recommend using preset sizes first to avoid dimension errors. A typical example: the US standard 3.5 × 2 inches (88.9 × 50.8 mm) outputs 1050 × 600 pixels at 300 DPI. Note the conceptual difference between DPI and PPI: DPI for print refers to ink dot density, while PPI for screens refers to pixel density, though the calculation logic is the same.