Skärmstorlekkalkulator – Find bredd, høyde og area
Calculate screen dimensions, width, height, and area from diagonal size and aspect ratio.
Slik bruker du denne kalkulatoren
- Skriv inn Diagonal Size (inches)
- Skriv inn Aspect Ratio
- Klikk på Beregn-knappen
- Les resultatet som vises under kalkulatoren
How Screen Size Is Calculated
Screen size is measured diagonally. Given the diagonal and aspect ratio, we use the Pythagorean theorem: Width = diagonal × (aspect_w / √(aspect_w² + aspect_h²)). This gives you exact physical dimensions in both inches and centimeters.
Knowing screen dimensions helps you compare monitors, TVs, and displays, plan desk or wall space, and choose the right resolution.
Common Aspect Ratios Explained
16:9 is the most common for TVs, monitors, and laptops. 16:10 is popular for professional monitors with extra vertical space. 4:3 is the classic format for older displays. 21:9 (ultrawide) is preferred by gamers and video editors.
A 55-inch 16:9 TV measures approximately 47.9 × 27.0 inches (121.7 × 68.6 cm).
Screen Area and Pixel Density
A larger screen area doesn't always mean better image quality — pixel density (PPI) matters too. A 4K resolution on a 27-inch monitor gives ~163 PPI, which is sharper than 4K on a 55-inch TV (~80 PPI).
Use this calculator alongside a PPI calculator to make informed decisions about display purchases.
Sist oppdatert: March 2026
Frequently Asked Questions
How is screen size measured?
Screen size is measured diagonally from corner to corner, not including the bezel. This is the standard used by all TV, monitor, and smartphone manufacturers worldwide.
What is the actual viewing area of a 65-inch TV?
A 65-inch 16:9 TV has a width of approximately 56.7 inches (144 cm) and a height of 31.9 inches (81 cm), giving a viewing area of about 1,808 square inches.
Does aspect ratio affect screen size?
The aspect ratio determines the shape of the screen. Two screens with the same diagonal measurement but different aspect ratios will have different widths and heights — a 32:9 ultrawide has a much wider but shorter image than a 16:9 at the same diagonal.