DPI Formula:
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Definition: This calculator converts Pixels Per Inch (PPI) to Dots Per Inch (DPI), which are equivalent measurements in digital imaging.
Purpose: It helps designers, photographers, and printers understand the relationship between digital resolution and print resolution.
The calculator uses the simple formula:
Where:
Explanation: In digital imaging, PPI and DPI are often used interchangeably since each pixel typically corresponds to one dot in printing.
Details: Understanding this relationship ensures proper image resolution for high-quality prints and digital displays.
Tips: Simply enter the PPI value to get the equivalent DPI. The value must be > 0.
Q1: Are PPI and DPI really the same?
A: Technically, PPI refers to digital pixels while DPI refers to printed dots, but in practice they're often equivalent.
Q2: When would PPI and DPI differ?
A: They may differ with specialized printing techniques that use multiple dots to represent one pixel.
Q3: What's a good PPI/DPI for printing?
A: 300 PPI/DPI is standard for high-quality prints, while 72-150 is common for screen displays.
Q4: Does this calculator work for all devices?
A: Yes, the PPI to DPI conversion is device-independent.
Q5: How do I find my screen's PPI?
A: Divide your screen's resolution by its physical size in inches.