1. What is an Aspect Ratio Calculator?

Definition: This calculator determines the aspect ratio of an image or display based on its pixel dimensions and can optionally convert to physical inches when DPI is known.

Purpose: Essential for designers, photographers, and video editors to maintain proper proportions across different media and devices.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( AR \) — Aspect ratio (dimensionless)
• \( W \) — Width in pixels
• \( H \) — Height in pixels

When DPI is provided, physical dimensions are calculated as:

• Width (inches) = Width (pixels) / DPI
• Height (inches) = Height (pixels) / DPI

3. Importance of Aspect Ratio

Details: Correct aspect ratio ensures images and videos display properly without distortion across different devices and platforms.

4. Using the Calculator

Tips: Enter width and height in pixels. For physical dimensions, enter the DPI (dots per inch) value of the display or printer.

5. Frequently Asked Questions (FAQ)

Q1: What are common aspect ratios?
A: Common ratios include 16:9 (HD), 4:3 (SD), 1:1 (square), and 21:9 (ultrawide).

Q2: How does DPI affect the calculation?
A: DPI converts pixel dimensions to physical inches, showing actual size when printed or displayed.

Q3: What if I only know one dimension and aspect ratio?
A: Use our Reverse Aspect Ratio Calculator to find missing dimensions.

Q4: Does this work for video resolutions?
A: Yes, the same calculation applies to video frame sizes and display resolutions.

Q5: How precise should I be with DPI values?
A: For screens, use the actual PPI (pixels per inch). For printers, use the DPI specified by the manufacturer.