Technology
Screen Resolution Megapixel Calculator
Calculate the total megapixel count and aspect ratio of a screen resolution such as 1920x1080 or 3840x2160.
px
px
Your results
Total megapixels8.29 MP
Aspect ratio16:9
Calculation breakdown
- Megapixels
- (width × height) ÷ 1,000,000
- Aspect ratio
- width ÷ GCD : height ÷ GCD
Worked example
A 3840x2160 (4K) resolution has 3840 × 2160 = 8,294,400 pixels, or about 8.29 megapixels, at a 16:9 aspect ratio.
Assumptions
- Assumes square, non-interlaced pixels.
How this calculator works
Enter a screen's horizontal and vertical pixel count to see the total megapixel count and simplified aspect ratio, useful for comparing monitors, TVs and cameras.
Frequently asked questions
How many megapixels is 4K?
A standard 3840x2160 4K resolution is about 8.3 megapixels, roughly four times a 1080p (1920x1080) screen.
Is a higher resolution always better?
Not necessarily — it depends on screen size and viewing distance; very high resolutions on small screens give diminishing visible benefit.
What is the aspect ratio of most monitors?
Most desktop monitors and TVs use 16:9; ultrawide monitors commonly use 21:9.
Related calculators
Screen Pixels Per Inch (PPI) CalculatorCalculate a screen's pixel density (PPI) from its resolution and diagonal size in inches.Image Aspect Ratio CalculatorWork out a proportional height or width for an image, or simplify its aspect ratio, from two known dimensions.Video Bitrate CalculatorCalculate the recommended video bitrate to hit a target file size, or the resulting size from a chosen bitrate.Unit Conversion CalculatorConvert length, weight, volume, area, temperature, speed and fuel economy units, including litres per 100km, km per litre and miles per gallon.Video File Size CalculatorEstimate the file size of a video from its bitrate and duration, useful for storage and upload planning.