Resolution compare calculator
Compare two display resolutions side by side: pixel count difference, megapixels, aspect ratio and GPU workload.
Resolution comparison result
Pixel difference
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- Megapixels A
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- Megapixels B
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- Aspect ratio
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- 1920×1080
- 2560×1440
Full comparison
| Property | Resolution A | Resolution B | Difference |
|---|
How it works
Resolution comparison quantifies the pixel count difference between two display resolutions, such as 1080p and 4K. It calculates the ratio of total pixels, the megapixel count for each, and whether the aspect ratios match, to help judge the visual and GPU performance trade-off.
- Pick two resolutions
Use a preset or type custom width and height for A and B.
- Read the pixel difference
The percentage shows how many more or fewer pixels B has than A.
- Check the full table
Exact pixel counts, aspect ratios and the difference for each property.
The pixel count formula
Total pixels is width times height; the percentage difference compares B's pixel count to A's:
Pixels = Width × Height
Difference = (Pixels B − Pixels A) ÷ Pixels A × 100%
4K UHD (3840×2160) has 8,294,400 pixels; 1080p (1920×1080) has 2,073,600 pixels. 4K has exactly 4× the pixel count of 1080p, which is why rendering at 4K needs roughly 4× the GPU fill-rate budget for the same scene.
Common resolutions
- 720p HD: 1280×720, 0.92 megapixels.
- 1080p FHD: 1920×1080, 2.07 megapixels.
- 1440p QHD: 2560×1440, 3.69 megapixels, 78% more than 1080p.
- 4K UHD: 3840×2160, 8.29 megapixels, 4× 1080p.
- 8K UHD: 7680×4320, 33.2 megapixels, 16× 1080p.
Upscaling changes the trade-off
DLSS, FSR and XeSS render internally at a lower resolution and upscale to the display's native resolution, recovering most of the higher resolution's visual quality at a fraction of the GPU cost. The pixel counts here are for native, non-upscaled rendering.
Frequently asked questions
How many more pixels does 4K have compared to 1080p?
4K UHD (3840×2160) contains 8,294,400 pixels; 1080p (1920×1080) contains 2,073,600 pixels. 4K has exactly 4× the pixel count of 1080p, which is why rendering at 4K requires roughly 4× the GPU fill-rate budget. The resolution names reflect horizontal pixel count: 4K is approximately 4,000 horizontal pixels, though the actual UHD standard is 3,840.
Is QHD (1440p) worth the upgrade from 1080p for a 27-inch monitor?
QHD (2560×1440) has 3,686,400 pixels, 78% more than 1080p. On a 27-inch panel, 1440p yields about 109 PPI versus 82 PPI for 1080p, a meaningful sharpness improvement visible in text and fine textures at typical viewing distances. Most mid-tier GPUs sustain 1440p at high settings better than 4K, making it a common balance of sharpness, GPU demand and cost.
What is the performance penalty of rendering at 4K instead of 1440p?
4K (3840×2160) has 8,294,400 pixels; 1440p (2560×1440) has 3,686,400, a 2.25× pixel ratio. All else equal, the GPU must process more than double the fragments per frame, and VRAM bandwidth demand rises with it. Upscaling technologies like DLSS, FSR and XeSS allow rendering at 1440p internally while outputting at 4K, recovering most of native 4K's visual quality at far lower GPU cost.
Does 8K make sense for consumer monitors today?
8K UHD (7680×4320) has 33.2 million pixels, 16× more than 1080p and 4× more than 4K. On a 32-inch 8K panel, PPI reaches about 275, beyond what most people can perceive at normal viewing distance. Available 8K content is limited, 8K monitors are expensive, and no single GPU renders 8K games at playable frame rates without aggressive upscaling; 8K is mainly relevant today for professional post-production and large-format signage.
What resolution is best for a 49-inch super-ultrawide monitor?
49-inch 32:9 super-ultrawides are typically available at 3840×1080 (DFHD) or 5120×1440 (DQHD). DFHD gives only about 81 PPI at 49 inches, visibly soft at normal viewing distance. DQHD at 5120×1440 yields about 108 PPI, equivalent to a 27-inch 1440p panel, and is the more commonly recommended resolution for this format, though it needs a capable GPU to sustain high frame rates.