Desktop monitors
Start with the diagonal for the monitor listing, then check width and height against your desk, arm, and sightline.
Screen Size Converter: Inches to Centimeters
Convert TV and monitor sizes from inches to centimeters. Get actual width, height, and viewing distance for any screen size.
Screen sizes are measured diagonally. Use our calculator to find the exact width and height dimensions for your space planning.
Quick Screen Size Calculator
inches
Results:
• Diagonal: 55 inches = 139.7 cm
• Width: 47.9 inches = 121.8 cm
• Height: 27.0 inches = 68.5 cm
• Screen Area: 1293 sq in = 83 sq cm
Choose by space
Start with the screen's job, then check its footprint
A screen's advertised inches describe its diagonal. Before buying or mounting, compare the 16:9 width and height below with the space you actually have.
Small-room TVs
Compare the full display width before choosing a wall, cabinet, or bedroom viewing position.
Living-room TVs
Use the diagonal for viewing-distance guidance, but use width and height for furniture, mounting, and wall-space planning.
| Diagonal | Diagonal in cm | 16:9 width × height | Typical use |
|---|---|---|---|
| 24 inches | 61.0 cm | 53.1 cm × 29.9 cm | Compact desk or secondary display |
| 27 inches | 68.6 cm | 59.8 cm × 33.6 cm | Everyday desktop monitor |
| 32 inches | 81.3 cm | 70.8 cm × 39.8 cm | Large monitor or compact TV |
| 43 inches | 109.2 cm | 95.2 cm × 53.5 cm | Bedroom or small-room TV |
| 55 inches | 139.7 cm | 121.8 cm × 68.5 cm | Living-room TV |
| 65 inches | 165.1 cm | 143.9 cm × 80.9 cm | Large living-room TV |
| 75 inches | 190.5 cm | 166.0 cm × 93.4 cm | Large-room TV |
Width and height are approximate active display dimensions for a 16:9 screen. Bezel thickness, stand depth, wall mounts, and ultrawide aspect ratios vary by model.
Popular TV & Monitor Sizes
| Size | Diagonal | Width | Height |
|---|---|---|---|
| 24" | 61.0 cm | 53.3 cm | 30.0 cm |
| 27" | 68.6 cm | 59.7 cm | 33.5 cm |
| 32" | 81.3 cm | 70.9 cm | 39.9 cm |
| 43" | 109.2 cm | 95.3 cm | 53.6 cm |
| 55" | 139.7 cm | 121.9 cm | 68.6 cm |
| 65" | 165.1 cm | 144.0 cm | 81.0 cm |
| 75" | 190.5 cm | 166.1 cm | 93.5 cm |
| 85" | 215.9 cm | 188.2 cm | 105.9 cm |
Note: Dimensions based on 16:9 aspect ratio
Popular screen sizes in cm
Screen sizes are measured diagonally. This reference covers the most common monitor and TV sizes, from 24-inch desktop displays through 75-inch living-room TVs, before you compare width, height, mounting, or viewing distance.
24 inches to cmSmall monitor diagonal27 inches to cmPopular desktop monitor diagonal28 inches to cmLarge desktop monitor diagonal32 inches to cmPopular TV and monitor size40 inches to cmCompact TV diagonal43 inches to cmCommon bedroom TV diagonal50 inches to cmMid-size TV diagonal55 inches to cmPopular living-room TV diagonal65 inches to cmLarge TV diagonal75 inches to cmLarge-room TV diagonalInches to CM chartPrintable screen-size reference
Optimal Viewing Distance
The ideal viewing distance depends on screen size and resolution. Sit too close and you'll see pixels; too far and you'll miss details.
| Screen Size | 1080p (HD) | 4K (UHD) | 8K |
|---|---|---|---|
| 32" | 1.3-2.0 m | 0.6-1.0 m | 0.3 m |
| 43" | 1.8-2.7 m | 0.9-1.3 m | 0.4 m |
| 55" | 2.3-3.5 m | 1.1-1.7 m | 0.6 m |
| 65" | 2.7-4.1 m | 1.3-2.0 m | 0.7 m |
| 75" | 3.1-4.7 m | 1.5-2.3 m | 0.8 m |
| 85" | 3.5-5.3 m | 1.7-2.6 m | 0.9 m |
Pro Tip: For immersive gaming or movies, sit at the closer end of the range. For casual viewing, the farther end is more comfortable.
Compare Screen Sizes
32"
81.3 cm
55"
139.7 cm
Size Difference: 23 inches (58.4 cm) diagonal
Area Difference: 55" is 3.0× larger than 32"
Screen Sizes in Real-World Context
Understanding dimensions is easier with familiar comparisons:
📱24" Monitor (61 cm)
- • About the width of a standard keyboard
- • Fits comfortably on most desks
- • Similar to two tablets side-by-side
🖥️32" Monitor (81 cm)
- • Roughly the wingspan of a large bird
- • Ideal for dual-window productivity
- • Comparable to a small coffee table width
📺55" TV (140 cm)
- • About as wide as a standard doorway
- • Fits well in 10-15 ft viewing distance rooms
- • Similar to the height of a 10-year-old child
📺65" TV (165 cm)
- • Approximately the height of an average adult
- • Requires 12-18 ft viewing distance
- • Comparable to a twin bed width
📺75" TV (191 cm)
- • Nearly as wide as a queen-size bed
- • Best for rooms 15+ ft deep
- • About the length of a standard bathtub
How to Choose the Right Screen Size
Room Size Guidelines
Small Room (< 10 ft / 3 m viewing distance)
→ Recommended: 32"-43" (81-109 cm)
→ Avoid: Screens larger than 50" will feel overwhelming
Medium Room (10-15 ft / 3-4.5 m viewing distance)
→ Recommended: 50"-65" (127-165 cm)
→ Sweet spot: 55" for most living rooms
Large Room (15+ ft / 4.5+ m viewing distance)
→ Recommended: 65"-85" (165-216 cm)
→ Consider: Home theater seating arrangement
Resolution Matters
- • 1080p (Full HD): Best for screens under 43"
- • 4K (Ultra HD): Recommended for 43" and larger
- • 8K: Only beneficial for 65"+ at close distances
Desk Setup for Monitors
- • 24": Ideal for 50-75 cm (20-30 in) desk depth
- • 27": Requires 60-90 cm (24-36 in) desk depth
- • 32"+: Best with 75+ cm (30+ in) desk depth
- • Ultrawide: Add 15-20 cm to standard depth
Frequently Asked Questions
Screen size refers to the diagonal measurement from one corner to the opposite corner. It does not include the bezel (frame) around the screen.
16:9 is the standard widescreen ratio used in most TVs and monitors. 21:9 (ultrawide) is wider, providing more horizontal space - ideal for multitasking or immersive gaming.
Multiply the diagonal measurement in inches by 2.54. For example: 55 inches × 2.54 = 139.7 cm. Use our calculator above for instant results.
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