PPI Calculator
Calculate pixel density, screen dimensions, dot pitch, and total pixels using your display size and resolution. Enter the diagonal screen size and resolution to estimate how sharp a monitor, laptop, phone, tablet, or TV will appear.
Screen size (diagonal)
Distance from two non-consecutive visible screen corners.
Screen dimensions (detailed)
Screen resolution
Number of pixels along the screen width.
Number of pixels along the screen height.
Number of pixels along the diagonal.
Number of pixels composing the screen.
Pixels per inch
Average number of pixels per inch.
Average distance between pixels. On modern displays, dots are effectively pixels.
What Is PPI?
PPI (Pixels Per Inch) measures how many pixels are packed into one inch of a display. It is one of the most common ways to describe a screen's pixel density.
A higher PPI generally means that images, text, and icons appear sharper because more pixels fit into the same physical area. A lower PPI can make individual pixels easier to notice, especially when viewing the screen up close.
PPI is commonly used to compare monitors, laptops, smartphones, tablets, and other digital displays.
How the PPI Calculator Works
Our PPI Calculator determines the pixel density of your display using its screen size and resolution.
- Screen size (diagonal)
- Horizontal resolution
- Vertical resolution
The calculator instantly displays:
- Pixels Per Inch (PPI)
- Total pixel count
- Dot pitch
- Screen dimensions
This makes it easy to compare different displays and understand how sharp they will appear in everyday use.
Why PPI Matters
Pixel density affects how clear content looks on your screen.
- Sharper text
- Cleaner graphics
- More detailed images
- Smoother curves and fonts
- Better viewing experience at close distances
However, a higher PPI is not always necessary. The ideal value depends on screen size, viewing distance, and intended use. A smartphone is viewed much closer than a television, so it typically requires a much higher pixel density.
PPI vs DPI
| PPI | DPI |
|---|---|
| Pixels Per Inch | Dots Per Inch |
| Used for digital displays | Used for printers |
| Measures screen pixel density | Measures printer ink density |
When discussing monitors, laptops, phones, or TVs, PPI is the correct measurement. DPI is mainly used when printing documents or photos.
Common PPI Values
| PPI | Display Quality |
|---|---|
| Below 100 | Low pixel density |
| 100–150 | Standard desktop monitors |
| 150–220 | High-density displays |
| 220–300 | Premium laptops and tablets |
| 300+ | Modern smartphones and Retina-class displays |
What Affects Pixel Density?
Screen Resolution
Increasing resolution adds more pixels, resulting in higher pixel density when screen size stays the same.
- 1920 × 1080
- 2560 × 1440
- 3840 × 2160
Screen Size
A 24-inch Full HD monitor has a higher PPI than a 32-inch Full HD monitor because the same number of pixels covers a smaller physical surface.
Viewing Distance
The closer you sit to a display, the easier it becomes to notice individual pixels. Phones therefore need much higher PPI than TVs.
Is Higher PPI Always Better?
Not necessarily. Higher PPI usually improves image sharpness, but the difference becomes less noticeable once individual pixels are no longer visible to the human eye.
When choosing a display, it is better to consider:
- Screen size
- Resolution
- Viewing distance
- Intended use
Typical PPI Examples
| Device | Resolution | Size | Approx. PPI |
|---|---|---|---|
| 24" Monitor | 1920 × 1080 | 24" | 92 |
| 27" Monitor | 2560 × 1440 | 27" | 109 |
| 32" Monitor | 3840 × 2160 | 32" | 138 |
| 6.7" Smartphone | 2796 × 1290 | 6.7" | 460+ |
Popular Monitor PPI Reference
| Resolution | 24" | 27" | 32" |
|---|---|---|---|
| 1080p | 92 PPI | 82 PPI | 69 PPI |
| 1440p | 122 PPI | 109 PPI | 92 PPI |
| 4K | 184 PPI | 163 PPI | 138 PPI |