Screen Dimensions Calculator – Width and Height from Diagonal
Calculate monitor or TV width, height, and area from the diagonal size.
About This Calculator
Calculate monitor or TV width, height, and area from the diagonal size. Use the calculator above for instant results.
Worked Examples
- Width: 27.9" (70.9 cm) | Height: 15.7" (39.9 cm)
Answer: 27.9" wide
- Width: 56.7" (144 cm) | Height: 31.9" (81 cm)
Answer: 56.7" wide
- Width: 31.5" | Height: 13.5"
Answer: 31.5" wide
Who Uses This Calculator?
Know exact dimensions before purchasing.
Check if TV fits your space.
Spec display installations.
Plan workstation layouts.
Common Mistakes to Avoid
❌ Diagonal isn't width
People often confuse diagonal with width. A 65" TV is 56.7" wide, not 65" wide. Always check actual dimensions.
❌ Stand adds height
Add 3-6 inches for the TV stand when measuring if it will fit in your entertainment center.
Frequently Asked Questions
How to measure a TV?
Corner to corner diagonally (screen only, not bezel). Manufacturers measure screen diagonal.
Ultrawide vs standard?
34" 21:9 ultrawide is wider (31.5") than a 32" 16:9 (27.9") but same height. Great for productivity.
Wall mount vs stand?
Wall mount saves desk/floor space. Measure VESA pattern (75×75 or 100×100 common) for mount compatibility.