1. What is DPI?

DPI (dots per inch) measures the resolution of an image in printing or on digital displays. It indicates how many individual dots can fit into a one-inch space.

2. How Does the Calculator Work?

The calculator uses the DPI formula:

Where:

• \( Pixels \) — Number of pixels in the image dimension
• \( Inches \) — Physical size in inches for that dimension

Explanation: The equation calculates how many pixels would be printed or displayed per inch of physical space.

3. Importance of DPI Calculation

Details: DPI is crucial for determining image quality in print, ensuring proper resolution for different viewing distances, and maintaining image clarity across different output devices.

4. Using the Calculator

Tips: Enter the pixel dimension (width or height) and the corresponding physical size in inches. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between DPI and PPI?
A: DPI (dots per inch) refers to printer dots, while PPI (pixels per inch) refers to screen pixels. They're often used interchangeably but technically different.

Q2: What is a good DPI for printing?
A: 300 DPI is standard for high-quality prints. 150 DPI may be acceptable for large format prints viewed from a distance.

Q3: Does DPI affect file size?
A: Not directly. DPI is metadata that tells how to render pixels. The pixel dimensions determine file size.

Q4: Can I change DPI without resampling?
A: Yes, changing DPI without changing pixel dimensions only affects how the image will print, not its digital appearance.

Q5: Why does my image look blurry even with high DPI?
A: Blurriness comes from insufficient pixel dimensions for the display size, not DPI alone. More pixels are needed for larger displays.