Resolution names hide how big the jumps really are. "4K" sounds like one step past "1440p," but it holds more than double the pixels, and that's impossible to feel from the label alone. The tool below overlays any two resolutions to scale at your screen size, with pixels, sharpness, and GPU load side by side, so you can see the difference instead of guessing.
4K holds 4.0× the pixels of 1080p.
The tool turns abstract specs into a picture you can judge. Pick two resolutions and a screen size, and it draws their pixel grids overlaid to scale, then reports the numbers that actually decide sharpness and performance for each one:
Seeing 4K's grid sit inside 1080p's makes the four-times-pixels gap concrete in a way no spec sheet can. It's the fastest way to settle a buying decision between two monitors.
Three quick steps give you a clear answer:
Use it to decide between two monitors, to check whether a resolution will look sharp at a given size, or simply to understand how the standards relate to each other. The PPI readout is the key number for sharpness, and the GPU load tells you whether your graphics card can keep up.
Here's how the common desktop resolutions stack up on raw pixels and GPU load, using 1080p as the baseline. The pattern shows why each step up feels bigger than the name suggests.
| Resolution | Pixels (W x H) | Total pixels | GPU load vs 1080p |
|---|---|---|---|
| 720p | 1280 x 720 | 0.9 MP | 0.44x |
| 1080p | 1920 x 1080 | 2.1 MP | 1.0x (baseline) |
| 1440p | 2560 x 1440 | 3.7 MP | 1.78x |
| 4K | 3840 x 2160 | 8.3 MP | 4.0x |
| 8K | 7680 x 4320 | 33.2 MP | 16.0x |
The GPU load column is the eye-opener. 4K isn't twice as hard to run as 1080p, it's four times. And 8K is sixteen times, which is why it's still impractical for gaming. The tool lets you check any pair at your own screen size.
Pixels alone don't tell the whole story, because the same resolution looks sharper on a smaller screen. That's why the tool asks for a screen size: it converts each resolution's pixel count into PPI, the honest measure of how crisp it'll actually appear at a normal desk distance.
| Resolution | PPI at 24 in | PPI at 27 in | PPI at 32 in |
|---|---|---|---|
| 1080p | 92 | 82 | 69 |
| 1440p | 122 | 109 | 92 |
| 4K | 184 | 163 | 138 |
Read down the 32-inch column and you can see why 1080p struggles at that size (69 PPI looks soft) while 1440p only just holds up. The same resolution that's crisp on a 24-inch screen can disappoint on a 32-inch one. Our PPI calculator focuses purely on this density question for any single screen.
The three resolutions most people choose between sit at clear price-and-performance tiers. The comparison overlay makes the gaps between them visible, but here's the quick summary of where each one wins:
For the detailed head-to-heads behind these, see our 1080p vs 1440p, 1080p vs 4K, and 1440p vs 4K comparisons. Each one breaks down the real-world difference frame by frame.
The single most overlooked factor in a resolution comparison is how much harder each one is to drive. Because rendering load scales with pixel count, doubling the pixels roughly doubles the work your graphics card does to hit the same frame rate.
That's why a card that runs 1080p at 144 frames per second might manage only around 80 at 1440p and closer to 40 at 4K in the same game. The comparison tool's GPU-load figure, scaled against 1080p, gives you a quick reality check before pairing a monitor with your hardware. Our best resolution for gaming guide adds the frame-rate view in full.
When two monitors tempt you, the comparison tool settles it fast. Enter both resolutions at the size you'd buy, and three numbers decide it: the PPI tells you if it'll look sharp, the total pixels show the detail gain, and the GPU load warns whether your card can drive it smoothly.
A practical rule: keep PPI at roughly 90 or higher for a sharp desktop, and make sure the GPU load fits your graphics card's headroom. If a resolution clears both bars at your screen size, it's a safe buy. For the full standards and where each fits, see our screen resolution guide and the sortable resolution chart.
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