Screen Size Tools
Convert screen diagonals, calculate width and height from aspect ratios, and compare common TV, monitor, and phone sizes.
Inches to CM (Screen)
Convert screen diagonal inches to cm
CM to Inches (Screen)
Convert screen diagonal cm to inches
Screen Size Calculator
Diagonal + ratio → width × height
Aspect Ratio Calculator
Width × height → ratio + diagonal
Common Screen Sizes
| Device | Diagonal | Ratio | W × H (cm) |
|---|---|---|---|
| iPhone 15 Pro | 6.1" | 19.5:9 | 14.1 × 6.5 |
| iPad 10.9" | 10.9" | 4:3 | 22.1 × 16.6 |
| 13" Laptop | 13.3" | 16:10 | 28.6 × 17.9 |
| 14" Laptop | 14" | 16:10 | 30.2 × 18.8 |
| 15.6" Laptop | 15.6" | 16:9 | 34.5 × 19.4 |
| 24" Monitor | 24" | 16:9 | 53.1 × 29.9 |
| 27" Monitor | 27" | 16:9 | 59.8 × 33.6 |
| 32" Monitor | 32" | 16:9 | 70.8 × 39.8 |
| 34" Ultrawide | 34" | 21:9 | 79.4 × 34 |
| 43" TV | 43" | 16:9 | 95.2 × 53.5 |
| 55" TV | 55" | 16:9 | 121.8 × 68.5 |
| 65" TV | 65" | 16:9 | 143.9 × 80.9 |
| 75" TV | 75" | 16:9 | 166 × 93.4 |
| 85" TV | 85" | 16:9 | 188.2 × 105.8 |
Frequently Asked Questions
How is screen size measured?
Screen size refers to the diagonal measurement from corner to corner, in inches.
What is aspect ratio?
The proportional relationship between width and height. 16:9 means for every 16 units wide, it's 9 units tall.
What is the most common TV aspect ratio?
16:9 is the standard for TVs, monitors, and most video content.
How do I calculate screen width and height?
Use diagonal and aspect ratio. Width = diagonal × cos(atan(h/w)), Height = diagonal × sin(atan(h/w)).
Is a 27" monitor bigger than a 32" TV?
In diagonal, no. But a 27" 16:9 monitor has similar pixel density at typical viewing distance to a 32" TV.