Resolution Scale Calculator
Our resolution scale calculator helps you resize digital resolutions and provides other resolutions that maintain the aspect ratio in its dynamic resolution scale chart. You can easily up-scale or down-scale your resolution by entering your resolution scale as a percentage, or by inputting its width and height in the original resolution fields.
Definition and Purpose of Resolution Scaling
The act of resizing a resolution to transform how it is displayed on the screen's pixels is known as resolution scaling.
When down-scaled, the display resolution takes up more pixels for each displayed object, providing a zoomed-in display. And when up-scaled, the display resolution takes fewer pixels for each displayed object, providing a zoomed-out display.
Image Resolution Scaling
Image resolution scaling works in an inverse manner to display resolution scaling. When resizing an image resolution while keeping the resolution of the display constant:
- Down-scaling causes the pixels in the image to come closer, sharpening the image and reducing its size.
- Up-scaling the image resolution causes its pixels to expand, thus blurring or pixelating the image and increasing its size.
Video resolution scaling works similarly to image resolution scaling — up-scaling the video resolution increases its size, but the quality drops, and the details become blurry.
Game Resolution Scaling
By default, video games run at fullscreen with their objects rendered at 1:1 to match the display resolution. We can down-scale their render resolution to increase the game's performance, but at the cost of visual quality. Or we can up-scale the render resolution to improve the visual quality, but at the expense of performance.
As an example, if your native screen resolution is 2560×1440, you can downscale your favorite game's render resolution to 1920×1080 to experience a significant boost in performance. However, you'll need to increase the sharpening and use anti-aliasing to improve your game's visual experience.
How to Scale a Resolution Using the Resolution Scale Calculator?
- Enter the original resolution width and height of your object, e.g., 1920×1080.
- Input the percentage by which you want to scale, e.g., 50%.
- If you want to down-scale, enter a percentage below 100%.
- If you want to up-scale, enter a percentage above 100%.
- The calculator displays the scaled values. For example, scaling 1920×1080 by 50% gives 960×540.
- Optionally, select a unit system (metric or imperial) and enter PPI to also calculate the print size of the scaled resolution.
After calculating, the calculator also shows the aspect ratio, megapixel counts, and a dynamic resolution scale chart with common percentages.
How to Calculate the Resolution Scale Percentage?
The resolution scale percentage is calculated using the following formula:
Scale (%) = (Scaled Width / Original Width) × 100
For example, if the original resolution is 3840×2160 (4K) and the scaled resolution is 1920×1080 (Full HD), the scale percentage is:
Scale (%) = (1920 / 3840) × 100 = 50%
How to Manually Scale or Resize a Resolution Using the Formula?
To scale a resolution manually, use the following formulas:
- Scaled Width = Original Width × (Scale % / 100)
- Scaled Height = Original Height × (Scale % / 100)
For example, scaling a 1920×1080 resolution to 75%:
- Scaled Width = 1920 × 0.75 = 1440 px
- Scaled Height = 1080 × 0.75 = 810 px
Standard Display Resolution Scales in Games, Images and Videos
| Scale | From 1920×1080 (FHD) | From 2560×1440 (QHD) | From 3840×2160 (4K) |
|---|---|---|---|
| 25% | 480×270 | 640×360 | 960×540 |
| 50% | 960×540 | 1280×720 | 1920×1080 |
| 75% | 1440×810 | 1920×1080 | 2880×1620 |
| 100% | 1920×1080 | 2560×1440 | 3840×2160 |
| 150% | 2880×1620 | 3840×2160 | 5760×3240 |
| 200% | 3840×2160 | 5120×2880 | 7680×4320 |
FAQs
What is the difference between upscaling and downscaling?
Upscaling increases the resolution — the image or video is stretched to occupy more pixels, which can reduce sharpness or introduce blur. Downscaling reduces the resolution — pixels are combined, which can increase sharpness for displays but reduces the file size and information density.
Does scaling affect the aspect ratio?
Scaling a resolution by a single percentage applies equally to both width and height, so the aspect ratio is preserved. For example, 1920×1080 (16:9) scaled by 50% gives 960×540, which is still 16:9.
What is PPI and how does it affect print size?
PPI (Pixels Per Inch) defines how many pixels fit in one inch when printing. A higher PPI results in a sharper but smaller print. To calculate the print size, divide the pixel dimensions by the PPI. For example, a 1920×1080 image printed at 96 PPI results in a print size of 20 × 11.25 inches (50.8 × 28.575 cm).
What are common PPI values?
- 72 PPI — Traditional screen resolution (web)
- 96 PPI — Standard Windows screen
- 150 PPI — Low-quality print
- 300 PPI — Standard print quality (recommended for photos)
- 600 PPI — High-quality print (professional)