cm to inches, mm, feet, gsm to lb, kg to lb, pixels to print size and more, with tape-measure fractions.
Convert centimetres to inches, millimetres to feet, kilograms to pounds, litres to gallons and Celsius to Fahrenheit in one place. Because we work in print and signs, it also does what most converters skip: it shows inch results as tape-measure fractions (like 3 15/16"), reads feet and inches typed as 5' 3", converts paper weight between gsm and US pounds by paper type, works out how big an image prints at any DPI, and lists standard paper sizes in mm, inches and pixels.
| cm | Inches (decimal) | Inches (nearest 1/16) |
|---|---|---|
| 1 cm | 0.394 in | 3/8" |
| 2 cm | 0.787 in | 13/16" |
| 2.5 cm | 0.984 in | 1" |
| 3 cm | 1.181 in | 1 3/16" |
| 5 cm | 1.969 in | 1 15/16" |
| 10 cm | 3.937 in | 3 15/16" |
| 15 cm | 5.906 in | 5 7/8" |
| 20 cm | 7.874 in | 7 7/8" |
| 25 cm | 9.843 in | 9 13/16" |
| 30 cm | 11.811 in | 11 13/16" |
| 40 cm | 15.748 in | 15 3/4" |
| 50 cm | 19.685 in | 19 11/16" |
| 60 cm | 23.622 in | 23 5/8" |
| 75 cm | 29.528 in | 29 1/2" |
| 100 cm | 39.37 in | 39 3/8" |
| Inches | cm | mm |
|---|---|---|
| 1/8" | 0.318 cm | 3.18 mm |
| 1/4" | 0.635 cm | 6.35 mm |
| 1/2" | 1.27 cm | 12.7 mm |
| 3/4" | 1.905 cm | 19.05 mm |
| 1" | 2.54 cm | 25.4 mm |
| 2" | 5.08 cm | 50.8 mm |
| 3" | 7.62 cm | 76.2 mm |
| 4" | 10.16 cm | 101.6 mm |
| 5" | 12.7 cm | 127 mm |
| 6" | 15.24 cm | 152.4 mm |
| 8" | 20.32 cm | 203.2 mm |
| 10" | 25.4 cm | 254 mm |
| 12" | 30.48 cm | 304.8 mm |
| 18" | 45.72 cm | 457.2 mm |
| 24" | 60.96 cm | 609.6 mm |
| 36" | 91.44 cm | 914.4 mm |
| 48" | 121.92 cm | 1,219.2 mm |
| kg | lb | lb + oz |
|---|---|---|
| 0.5 kg | 1.1 lb | 1 lb 1.6 oz |
| 1 kg | 2.2 lb | 2 lb 3.3 oz |
| 2 kg | 4.41 lb | 4 lb 6.5 oz |
| 5 kg | 11.02 lb | 11 lb 0.4 oz |
| 10 kg | 22.05 lb | 22 lb 0.7 oz |
| 20 kg | 44.09 lb | 44 lb 1.5 oz |
| 25 kg | 55.12 lb | 55 lb 1.8 oz |
| 50 kg | 110.23 lb | 110 lb 3.7 oz |
| 100 kg | 220.46 lb | 220 lb 7.4 oz |
The same paper has a different pound number in each US paper type, because each type is weighed at its own basis size. gsm is the reliable number to compare.
| gsm | Bond | Text | Cover | Index |
|---|---|---|---|---|
| 80 gsm | 21 lb | 54 lb | 3 lb | 44 lb |
| 90 gsm | 24 lb | 61 lb | 33 lb | 5 lb |
| 100 gsm | 27 lb | 68 lb | 37 lb | 55 lb |
| 120 gsm | 32 lb | 81 lb | 44 lb | 66 lb |
| 150 gsm | 4 lb | 101 lb | 55 lb | 83 lb |
| 170 gsm | 45 lb | 115 lb | 63 lb | 94 lb |
| 200 gsm | 53 lb | 135 lb | 74 lb | 111 lb |
| 250 gsm | 66 lb | 169 lb | 92 lb | 138 lb |
| 300 gsm | 8 lb | 203 lb | 111 lb | 166 lb |
| 350 gsm | 93 lb | 236 lb | 129 lb | 194 lb |
Every length in inches is also shown to the nearest 1/8, 1/16 or 1/32", and in feet and inches, the way sign makers and installers measure.
Type 5' 3 1/2" or 5 3/8 and get centimetres, millimetres or metres straight away.
See how large a photo prints at 300 DPI, or how many pixels a poster needs, in inches, cm or mm.
Business cards, postcards, Letter, Legal, Tabloid, A0 to A7, B sizes and envelopes, in mm, inches and pixels.
Typography units for designers: 72 points or 6 picas to the inch.
The address bar keeps your conversion, so you can bookmark it or send it to someone.
Planning a sign? The Sign Builder & Calculator works out letter sizes from viewing distance. Checking a photo for print? Try the Print-Ready Checker. Cutting vinyl? The Vinyl Decal Builder gives you true-size cut files.
Exactly 2.54 cm. So to turn inches into centimetres multiply by 2.54, and to turn centimetres into inches divide by 2.54.
Tape measures in North America are marked in fractions: 1/2, 1/4, 1/8 and 1/16 of an inch. The converter rounds any length to the nearest 1/8, 1/16 or 1/32 inch, so 10 cm shows as 3 15/16 inches.
gsm (grams per square metre) is the weight of one square metre of paper and is the same worldwide. US pound weights are the weight of 500 sheets at a "basis" size that depends on the paper type, so 80 lb text and 80 lb cover are different papers. The converter shows the same paper in every system.
Multiply the size in inches by the resolution. At 300 DPI, a 4 × 6 inch print needs 1200 × 1800 pixels. Use the Pixels & DPI tab for any size, in inches, cm or mm.
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