TV Inches to Width & Height
Inches measure the diagonal. At 16:9 the width is 0.871× the diagonal and the height 0.49× — a 55-inch set is 121.8 cm by 68.5 cm.
Your numbers
Length
121.8cm
Width
68.5cm
Area
8,339cm²
Formula
Length = Inches × 2.54 × Aspect width ÷ √(Aspect width² + Aspect height²)
Bezels and stands are not included — check the outer dimensions before fitting it into furniture.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Inches (in)The diagonal in inches — screens are always named by the diagonal. | 55 | 1 and up |
| Aspect widthThe width part of the aspect ratio — the 16 in 16:9. | 16 | 1 and up |
| Aspect heightThe height part of the aspect ratio — the 9 in 16:9. | 9 | 1 and up |
Step by step
Quick reference table
Results when only Inches (in) changes and everything else stays put.
| Inches (in) | Length (cm) | Width (cm) | Area (cm²) |
|---|---|---|---|
| 27.5 | 60.9 | 34.2 | 2,085 |
| 41.3 | 91.4 | 51.4 | 4,702 |
| 55 | 121.8 | 68.5 | 8,339 |
| 82.5 | 182.6 | 102.7 | 18,763 |
| 110 | 243.5 | 137 | 33,357 |
What each result means
| Result | At default values |
|---|---|
| Length (cm)The measurement across, side to side. | 121.8 |
| Width (cm)The measurement front to back. | 68.5 |
| Area (cm²)The space a shape covers — length squared. | 8,339 |
Common mistakes
Bezels and stands are not included — check the outer dimensions before fitting it into furniture.
Glossary
- Inches
- The diagonal in inches — screens are always named by the diagonal.
- Aspect width
- The width part of the aspect ratio — the 16 in 16:9.
- Aspect height
- The height part of the aspect ratio — the 9 in 16:9.
- Length
- The measurement across, side to side.
- Width
- The measurement front to back.
- Area
- The space a shape covers — length squared.
Frequently asked questions
Q. How is TV Inches to Width & Height calculated?
Length = Inches × 2.54 × Aspect width ÷ √(Aspect width² + Aspect height²) — Inches measure the diagonal. At 16:9 the width is 0.871× the diagonal and the height 0.49× — a 55-inch set is 121.8 cm by 68.5 cm.
Q. Can you walk through an example?
With Inches 55in, Aspect width 16, Aspect height 9, the answer is Length 121.8cm.
Q. What do I need to enter?
Enter Inches, Aspect width, Aspect height. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Inches (in) moves the answer to Inches (in) 27.5 → Length (cm) 60.9 and Inches (in) 110 → Length (cm) 243.5. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Bezels and stands are not included — check the outer dimensions before fitting it into furniture.
Related calculators
Keep your length units consistent across inputs — mixing centimetres and metres throws results far off.