対角線＋アスペクト比 → 縦横・面積、および画面Bが画面Aよりどれだけ大きいか。
サイズ選びで迷っているとき、大型が家具に収まるか確認したいとき、「65インチは55インチよりどれだけ大きい？」と知りたいときに使えます。数値は発光パネルのみで、プラスチックのベゼルは含みません。概要を読んだあと、トップページのキャンバスでスマホや紙と同じシーンに配置することもできます。
Use the same unit for both TVs. Measure the lit glass corner to corner—the length shops print as the screen size.
Visible area (approx.): 48" × 27"
Visible area (approx.): 56.7" × 31.9"
Display B has 39.7% larger viewable area than Display A (panel only, excludes bezel).
Change in listed diagonal (B vs A): 18.2%. Positive means B is larger; negative means smaller.
Shape preview (bottom-aligned, not to scale with homepage canvas)
Colors match the table columns above; overlapping outlines share the same bottom edge in this sketch.
| Metric | Display A | Display B |
|---|---|---|
| Diagonal (marketing) | 55" | 65" |
| Aspect ratio | 16:9 | 16:9 |
| Width (viewable) | 48" | 56.7" |
| Height (viewable) | 27" | 31.9" |
| Area (viewable) | 1,292.58 in² (~833,922 mm²) | 1,805.34 in² (~1,164,734 mm²) |
| Rough viewing distance | 8–14 in | 10–16 in |
Viewing distance is a rough living-room range (≈1.5–2.5× diagonal length), not a substitute for THX/SMPTE or your room layout.
How screen B compares to screen A
Percent uses screen A as the baseline (100%). Positive numbers mean B is larger; negative mean B is smaller. The last column shows the gap in everyday units.
| Metric | Change (%) | Approx. gap |
|---|---|---|
| Listed diagonal | 18.2% | +10" |
| Viewable width | 18.1% | +8.7" |
| Viewable height | 18.1% | +4.9" |
| Viewable area | 39.7% | +512.76 in² |
Quick presets
Compare phone sizes too
Smartphones are measured as physical bodies (glass + frame). The inch number here is the panel diagonal only—still useful when you want to place a phone next to a TV outline on the main canvas.
Tip: when you share the homepage link, TV outlines stay easy to pick out.