1. What is DPI?

DPI (Dots Per Inch) is a measurement of resolution that indicates how many individual dots can fit within a linear inch. It's commonly used to describe the resolution of printers, scanners, and digital images.

2. How Does the Calculator Work?

The calculator uses the DPI formula:

Where:

• \( Pixels \) — The number of pixels in the image
• \( Inches \) — The physical size in inches

Explanation: This simple division gives you the density of pixels per inch, which determines the resolution quality.

3. Importance of DPI Calculation

Details: Knowing the DPI helps ensure proper image quality for printing, scanning, or display purposes. Higher DPI generally means better quality but requires more resources.

4. Using the Calculator

Tips: Enter the total number of pixels and the 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 resolution, while PPI (Pixels Per Inch) refers to screen resolution, though they're often used interchangeably.

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

Q3: Does higher DPI always mean better quality?
A: Only up to a point. Beyond what the human eye can distinguish (about 300 DPI at normal viewing distance), higher DPI may not be noticeable.

Q4: How does DPI affect file size?
A: Higher DPI images contain more pixels and therefore create larger file sizes.

Q5: Can I change DPI without changing image quality?
A: Changing DPI alone doesn't affect quality if you keep the same pixel dimensions. It only changes how densely packed the pixels will be when printed.