How do you convert centimeters to inches?
To convert centimeters to inches, multiply the value by 0.3937 (the inverse of 2.54, the exact number of centimeters in one inch). Both centimeters and inches measure length: unlike cooking conversions, there's no density to look up, just a fixed factor.
centimeters = inches × 2.54
Common conversions
| 1 cm | 0.39 in |
| 2 cm | 0.79 in |
| 5 cm | 1.97 in |
| 10 cm | 3.94 in |
| 15 cm | 5.91 in |
| 20 cm | 7.87 in |
| 30 cm | 11.81 in |
| 50 cm | 19.69 in |
| 100 cm | 39.37 in |
| 180 cm | 70.87 in |
| 200 cm | 78.74 in |
Show every value
- 1 cm = 0.3937 in
- 2 cm = 0.7874 in
- 3 cm = 1.1811 in
- 4 cm = 1.5748 in
- 5 cm = 1.9685 in
- 6 cm = 2.3622 in
- 7 cm = 2.7559 in
- 8 cm = 3.1496 in
- 9 cm = 3.5433 in
- 10 cm = 3.937 in
- 11 cm = 4.3307 in
- 12 cm = 4.7244 in
- 13 cm = 5.1181 in
- 14 cm = 5.5118 in
- 15 cm = 5.9055 in
- 16 cm = 6.2992 in
- 17 cm = 6.6929 in
- 18 cm = 7.0866 in
- 19 cm = 7.4803 in
- 20 cm = 7.874 in
- 21 cm = 8.2677 in
- 22 cm = 8.6614 in
- 23 cm = 9.0551 in
- 24 cm = 9.4488 in
- 25 cm = 9.8425 in
- 26 cm = 10.2362 in
- 27 cm = 10.6299 in
- 28 cm = 11.0236 in
- 29 cm = 11.4173 in
- 30 cm = 11.811 in
- 31 cm = 12.2047 in
- 32 cm = 12.5984 in
- 33 cm = 12.9921 in
- 34 cm = 13.3858 in
- 35 cm = 13.7795 in
- 36 cm = 14.1732 in
- 37 cm = 14.5669 in
- 38 cm = 14.9606 in
- 39 cm = 15.3543 in
- 40 cm = 15.748 in
- 41 cm = 16.1417 in
- 42 cm = 16.5354 in
- 43 cm = 16.9291 in
- 44 cm = 17.3228 in
- 45 cm = 17.7165 in
- 46 cm = 18.1102 in
- 47 cm = 18.5039 in
- 48 cm = 18.8976 in
- 49 cm = 19.2913 in
- 50 cm = 19.685 in
- 51 cm = 20.0787 in
- 52 cm = 20.4724 in
- 53 cm = 20.8661 in
- 54 cm = 21.2598 in
- 55 cm = 21.6535 in
- 56 cm = 22.0472 in
- 57 cm = 22.4409 in
- 58 cm = 22.8346 in
- 59 cm = 23.2283 in
- 60 cm = 23.622 in
- 61 cm = 24.0157 in
- 62 cm = 24.4094 in
- 63 cm = 24.8031 in
- 64 cm = 25.1969 in
- 65 cm = 25.5906 in
- 66 cm = 25.9843 in
- 67 cm = 26.378 in
- 68 cm = 26.7717 in
- 69 cm = 27.1654 in
- 70 cm = 27.5591 in
- 71 cm = 27.9528 in
- 72 cm = 28.3465 in
- 73 cm = 28.7402 in
- 74 cm = 29.1339 in
- 75 cm = 29.5276 in
- 76 cm = 29.9213 in
- 77 cm = 30.315 in
- 78 cm = 30.7087 in
- 79 cm = 31.1024 in
- 80 cm = 31.4961 in
- 81 cm = 31.8898 in
- 82 cm = 32.2835 in
- 83 cm = 32.6772 in
- 84 cm = 33.0709 in
- 85 cm = 33.4646 in
- 86 cm = 33.8583 in
- 87 cm = 34.252 in
- 88 cm = 34.6457 in
- 89 cm = 35.0394 in
- 90 cm = 35.4331 in
- 91 cm = 35.8268 in
- 92 cm = 36.2205 in
- 93 cm = 36.6142 in
- 94 cm = 37.0079 in
- 95 cm = 37.4016 in
- 96 cm = 37.7953 in
- 97 cm = 38.189 in
- 98 cm = 38.5827 in
- 99 cm = 38.9764 in
- 100 cm = 39.3701 in
- 125 cm = 49.2126 in
- 150 cm = 59.0551 in
- 175 cm = 68.8976 in
- 200 cm = 78.7402 in
- 225 cm = 88.5827 in
- 250 cm = 98.4252 in
- 275 cm = 108.2677 in
- 300 cm = 118.1102 in
- 325 cm = 127.9528 in
- 350 cm = 137.7953 in
- 375 cm = 147.6378 in
- 400 cm = 157.4803 in
- 425 cm = 167.3228 in
- 450 cm = 177.1654 in
- 475 cm = 187.0079 in
- 500 cm = 196.8504 in
- 550 cm = 216.5354 in
- 600 cm = 236.2205 in
- 650 cm = 255.9055 in
- 700 cm = 275.5906 in
- 750 cm = 295.2756 in
- 800 cm = 314.9606 in
- 850 cm = 334.6457 in
- 900 cm = 354.3307 in
- 950 cm = 374.0157 in
- 1,000 cm = 393.7008 in
- 1,500 cm = 590.5512 in
- 2,000 cm = 787.4016 in
- 2,500 cm = 984.252 in
- 3,000 cm = 1,181.1024 in
- 3,500 cm = 1,377.9528 in
- 4,000 cm = 1,574.8031 in
- 4,500 cm = 1,771.6535 in
- 5,000 cm = 1,968.5039 in
- 5,500 cm = 2,165.3543 in
- 6,000 cm = 2,362.2047 in
- 6,500 cm = 2,559.0551 in
- 7,000 cm = 2,755.9055 in
- 7,500 cm = 2,952.7559 in
- 8,000 cm = 3,149.6063 in
- 8,500 cm = 3,346.4567 in
- 9,000 cm = 3,543.3071 in
- 9,500 cm = 3,740.1575 in
- 10,000 cm = 3,937.0079 in
Official conversion factor (1 in = 2.54 cm exactly, international yard-and-pound agreement of 1959) - see our methodology & sources page. Methodology & sources.
Frequently asked questions
How many inches is 1 centimeter?
1 centimeter equals exactly 0.3937 inch - the inverse of the inch-to-cm factor (2.54), fixed by international agreement since 1959.
How do I convert cm to inches without a calculator?
A quick approximation good enough for most everyday uses: divide the centimeter value by 2.5. For an exact result, use the 0.3937 factor or the converter above.
Why do screen sizes and wheels still use inches?
The inch remains the international standard for screen diagonals, car rims, and plumbing fittings even in metric countries - a holdover from Anglo-American industrial standards that became the global norm in those specific industries.
Has an inch always been 2.54 cm?
No. Until 1959 the American inch was 2.540005 cm and the British one 2.539998: three millionths apart, harmless for a carpenter but awkward for optics and aviation. The international yard and pound agreement fixed the inch at exactly 2.54 cm, the value in force ever since.
Why do screens talk in inches and dots per inch?
Because computing inherited the conventions of printing, which has counted in inches for centuries. Dots per inch measures image fineness, and a font size in points is 1/72 of an inch. A 96 dpi screen therefore renders one centimetre as 37.8 pixels, a figure that turns up in stylesheets.