Calculator 4K Images

4K Resolution Formula:

\[ \text{Resolution (px)} = \text{Width (px)} \times \text{Height (px)} \] \[ \text{Resolution (px²)} = 3840 \times 2160 \]

Total Resolution:

Megapixels:

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1. What is 4K Resolution?

4K resolution refers to a horizontal display resolution of approximately 4,000 pixels. The standard 4K UHD resolution is 3840 × 2160 pixels (8.3 megapixels), which is exactly four times the pixel count of Full HD (1920 × 1080).

2. How Resolution is Calculated

The calculator uses the resolution formula:

\[ \text{Resolution} = \text{Width} \times \text{Height} \]

Where:

Width — Horizontal pixel count
Height — Vertical pixel count

Example: For standard 4K UHD: 3840 × 2160 = 8,294,400 pixels (8.3 MP)

3. Importance of Resolution

Details: Higher resolution means more image detail and clarity, but also requires more storage space and processing power. 4K resolution is becoming standard for high-end displays and professional photography.

4. Using the Calculator

Tips: Enter width and height in pixels. The calculator will show total resolution in pixels² and megapixels. Default values show standard 4K UHD resolution.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between 4K and UHD?
A: True 4K is 4096×2160 (DCI standard), while UHD is 3840×2160. Most consumer displays use UHD but market it as 4K.

Q2: How many megapixels is 4K?
A: Standard 4K UHD (3840×2160) is approximately 8.3 megapixels.

Q3: Is 4K resolution noticeable on small screens?
A: On screens smaller than 40 inches viewed from normal distance, the difference from 1080p may not be noticeable.

Q4: What's the file size of a 4K image?
A: A raw uncompressed 4K RGB image would be about 24MB (3840×2160×3 bytes). Actual file sizes depend on compression.

Q5: What resolutions are higher than 4K?
A: 5K (5120×2880), 6K (6144×3160), and 8K (7680×4320) are progressively higher resolutions.