Screen Size Calculator
Estimate screen width, height, and diagonal size for any aspect ratio. Enter one known screen dimension and the calculator will determine the other two in inches and centimeters.
Start with the one screen measurement you already know — diagonal, width, or height — and the calculator will work out the other two automatically. If you change the aspect ratio above, the current known value will be kept and the other dimensions will update.
Diagonal
Width
Height
What Is Screen Size?
Screen size refers to the physical size of a display, measured diagonally from one corner of the visible screen to the opposite corner. It is typically expressed in inches, although centimeters are also commonly used in many countries.
Unlike screen resolution, which describes the number of pixels displayed, screen size measures the actual physical dimensions of the display. Two monitors can both have a resolution of 1920 × 1080, but one may be 24 inches while the other is 32 inches, resulting in different pixel density and viewing experiences.
Understanding screen size helps you choose the right monitor, television, projector screen, or laptop for your workspace and viewing distance.
How the Screen Size Calculator Works
Our Screen Size Calculator calculates the missing screen dimensions based on the aspect ratio and one known measurement.
- Select a screen aspect ratio.
- Enter the screen width, height, or diagonal size.
- The calculator computes the remaining dimensions. Results are shown in both inches and centimeters.
This makes it easy to compare displays, estimate installation space, and determine whether a screen will fit your desk, wall, or projector setup.
Screen Size vs. Screen Resolution
| Screen Size | Screen Resolution |
|---|---|
| Physical size of the display | Number of pixels on the display |
| Measured in inches or centimeters | Measured in pixels |
| Determines viewing area | Determines image detail and sharpness |
| Examples: 24", 27", 32" | Examples: 1920×1080, 2560×1440, 3840×2160 |
A larger screen does not always produce a sharper image. Image quality also depends on display resolution and pixel density (PPI).
Common Screen Sizes
| Screen Size | Typical Devices |
|---|---|
| 13–16" | Laptops |
| 22–24" | Office monitors |
| 27" | General-purpose and gaming monitors |
| 32" | Professional work and 4K displays |
| 34" | Ultrawide monitors |
| 43–65" | TVs |
| 80+" | Projector screens |
Why Screen Size Matters
Choosing the right screen size affects both comfort and productivity.
- Improve workspace efficiency.
- Make text easier to read.
- Enhance gaming and movie experiences.
- Reduce excessive window switching.
- Help maintain a comfortable viewing distance.
- Better match the available desk or wall space.
The ideal screen size depends on your viewing distance, display resolution, and intended use.
Choosing the Right Screen Size
Office & Productivity
24–27 inch monitors provide a comfortable balance between workspace and desk space.
Gaming
27-inch QHD and 32-inch 4K monitors are among the most popular choices for modern gaming.
Professional Design
Larger displays with high resolutions offer more workspace for editing photos, videos, and creative projects.
TVs & Home Theater
Screen size should be selected based on viewing distance to provide an immersive experience without sacrificing image quality.