A 17.3-inch laptop measures 15.1 inches wide and 8.5 inches high (38.3 × 21.5 cm) of actual screen area, based on a 16:9 aspect ratio. The 17.3-inch figure is the diagonal, not the width.
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Screen measurements calculated from the 17.3-inch diagonal at a 16:9 aspect ratio.
| Measurement | Imperial | Metric |
|---|---|---|
| Diagonal (screen size) | 17.3 in | 43.9 cm |
| Screen width | 15.1 in | 38.3 cm |
| Screen height | 8.5 in | 21.5 cm |
| Aspect ratio | 16:9 | 1.78:1 |
| Screen area | 127.9 sq in | 825.1 cm² |
Compare 17.3 inch laptops on Amazon →
| Resolution | Pixels | Pixel Density |
|---|---|---|
| 1080p FHD | 1920 × 1080 | 127 PPI |
| 1440p QHD | 2560 × 1440 | 170 PPI |
| 4K UHD | 3840 × 2160 | 255 PPI |
Screen dimensions are exact. Chassis and bag figures are typical ranges — always check the manufacturer's spec sheet for a specific model.
| Check | Typical figure | Notes |
|---|---|---|
| Screen area (exact) | 15.1 × 8.5 in | Calculated from the 17.3 in diagonal at 16:9 |
| Chassis width (typical) | 15.6–16.5 in | Depends on bezel thickness; 2023+ designs sit at the lower end |
| Chassis depth (typical) | 9.7–10.9 in | Includes the hinge area and palm rest |
| Minimum sleeve size | 17 × 11.4 in | Allow half an inch of padding clearance |
| Backpack laptop compartment | 17.3 in rated or larger | Bags are rated by the screen size they accept |
| Minimum desk depth | 24 in | Comfortable typing plus screen distance |
| Carry-on friendly | Yes, but needs a full-size carry-on or 15 in+ backpack | See our carry-on size guide |
Shop sleeves and bags for a 17.3 inch laptop →
Matching a bag? Our laptop bag size guide maps screen sizes to sleeve and briefcase dimensions, and the backpack size guide covers compartment ratings.
| Size | Screen (W × H) | Area | vs 17.3 in |
|---|---|---|---|
| 16 in | 13.6 × 8.5 in | 115.1 sq in | -10% screen area |
| 17.3 in (this size) | 15.1 × 8.5 in | 127.9 sq in | — |
Because screen area scales with the square of the diagonal, a small step up in inches is a larger jump in picture size than the numbers suggest.
The screen measures 15.1 × 8.5 inches (38.3 × 21.5 cm). The full chassis is typically 15.6–16.5 inches wide and 9.7–10.9 inches deep, depending on bezel size.
15.1 inches (38.3 cm) at a 16:9 aspect ratio. The 17.3-inch figure refers to the diagonal, not the width.
A sleeve of at least 17 × 11.4 inches, or any bag rated for 17.3-inch laptops. Bag ratings refer to the screen size the compartment accepts.
It is usable but bulky for travel; it needs a full-size carry-on or a backpack rated for this screen size, and can be cramped on a tray table.
Back to the full laptop sizes guide.
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