📺 Inches to cm Converter
Enter inches to get centimeters instantly. For screen sizes, it also shows the actual width × height.
Inches to cm chart
| inches | cm | inches | cm | inches | cm |
|---|---|---|---|---|---|
| 1 | 2.54 | 21 | 53.34 | 41 | 104.14 |
| 2 | 5.08 | 22 | 55.88 | 42 | 106.68 |
| 3 | 7.62 | 23 | 58.42 | 43 | 109.22 |
| 4 | 10.16 | 24 | 60.96 | 44 | 111.76 |
| 5 | 12.7 | 25 | 63.5 | 45 | 114.3 |
| 6 | 15.24 | 26 | 66.04 | 46 | 116.84 |
| 7 | 17.78 | 27 | 68.58 | 47 | 119.38 |
| 8 | 20.32 | 28 | 71.12 | 48 | 121.92 |
| 9 | 22.86 | 29 | 73.66 | 49 | 124.46 |
| 10 | 25.4 | 30 | 76.2 | 50 | 127 |
| 11 | 27.94 | 31 | 78.74 | 51 | 129.54 |
| 12 | 30.48 | 32 | 81.28 | 52 | 132.08 |
| 13 | 33.02 | 33 | 83.82 | 53 | 134.62 |
| 14 | 35.56 | 34 | 86.36 | 54 | 137.16 |
| 15 | 38.1 | 35 | 88.9 | 55 | 139.7 |
| 16 | 40.64 | 36 | 91.44 | 56 | 142.24 |
| 17 | 43.18 | 37 | 93.98 | 57 | 144.78 |
| 18 | 45.72 | 38 | 96.52 | 58 | 147.32 |
| 19 | 48.26 | 39 | 99.06 | 59 | 149.86 |
| 20 | 50.8 | 40 | 101.6 | 60 | 152.4 |
Fractions of an inch
| Fraction | Decimal inch | mm |
|---|---|---|
| 1/16″ | 0.0625 | 1.587 |
| 1/8″ | 0.125 | 3.175 |
| 1/4″ | 0.25 | 6.35 |
| 3/8″ | 0.375 | 9.525 |
| 1/2″ | 0.5 | 12.7 |
| 5/8″ | 0.625 | 15.88 |
| 3/4″ | 0.75 | 19.05 |
| 7/8″ | 0.875 | 22.22 |
TV and monitor sizes (diagonal → actual screen size, 16:9)
| Screen | Diagonal | Width × height (in) | Width × height (cm) | Note |
|---|---|---|---|---|
| 13.3″ | 33.78 cm | 11.6 × 6.5 | 29.4 × 16.6 | small laptop (many are 16:10) |
| 15.6″ | 39.62 cm | 13.6 × 7.6 | 34.5 × 19.4 | laptop |
| 24″ | 60.96 cm | 20.9 × 11.8 | 53.1 × 29.9 | office monitor |
| 27″ | 68.58 cm | 23.5 × 13.2 | 59.8 × 33.6 | popular 1440p monitor |
| 32″ | 81.28 cm | 27.9 × 15.7 | 70.8 × 39.8 | large monitor |
| 43″ | 109.2 cm | 37.5 × 21.1 | 95.2 × 53.5 | small TV |
| 55″ | 139.7 cm | 47.9 × 27.0 | 121.8 × 68.5 | living-room TV |
| 65″ | 165.1 cm | 56.7 × 31.9 | 143.9 × 80.9 | living-room TV |
| 75″ | 190.5 cm | 65.4 × 36.8 | 166.0 × 93.4 | large TV |
| 85″ | 215.9 cm | 74.1 × 41.7 | 188.2 × 105.8 | very large TV |
How to convert inches to cm
Enter inches to get centimeters and millimeters instantly. If the number is a TV or monitor diagonal, the results also show the actual screen width and height for 16:9 and 21:9, so you can check whether it fits your desk or wall.
Inches to cm formula
cm = inches × 2.54 — exact by definition since 1959.
Example: 12 inches × 2.54 = 30.48 cm, so a foot is 30.48 cm. For fractions, convert to a decimal first: 3/8″ = 0.375″ = 9.525 mm.
Screen diagonal → width and height
For an aspect ratio W:H, the Pythagorean theorem gives:
width = diagonal × W ÷ √(W² + H²) height = diagonal × H ÷ √(W² + H²)
For 16:9, √(16² + 9²) ≈ 18.36, so a 27″ monitor (68.58 cm) has a screen about 23.5 × 13.2 inches (59.8 × 33.6 cm). That is the visible panel; the bezel and stand add a little more.
Same inches, different size
Screen size is only the diagonal, so different aspect ratios give different areas. A 34″ 21:9 ultrawide is much shorter than a 34″ 16:9 screen would be. Many laptops are 16:10 or 3:2, so check the spec sheet. The ratio calculator works out aspect ratios from resolutions.
Wheel and tire sizes
Bike sizes such as 26″, 27.5″ and 29″ are nominal names for the approximate outer diameter with the tire; the exact rim size is given in ISO/ETRTO millimeters (for example 622 mm). A car's 17-inch wheel refers to the rim diameter.
Mental math
Inches × 2.5, then add a little (1.6%). 27″ → 67.5 + 1.1 = 68.6 cm (exact: 68.58).
Screen dimensions are calculated for the active panel area; check the product spec sheet for the full size with bezel and stand.