Chains to Millimeters (ch → mm)
Formula
1 ch = 20116.8 mmConversion Table
| ch | mm |
|---|---|
| 0 | 0 |
| 1.0000 | 20,117 |
| 2.0000 | 40,234 |
| 3.0000 | 60,350 |
| 4.0000 | 80,467 |
| 5.0000 | 100,580 |
| 6.0000 | 120,700 |
| 7.0000 | 140,820 |
| 8.0000 | 160,930 |
| 9.0000 | 181,050 |
| 10.000 | 201,170 |
| 11.000 | 221,280 |
| 12.000 | 241,400 |
| 13.000 | 261,520 |
| 14.000 | 281,640 |
| 15.000 | 301,750 |
| 16.000 | 321,870 |
| 17.000 | 341,990 |
| 18.000 | 362,100 |
| 19.000 | 382,220 |
| ch | mm |
|---|---|
| 20.000 | 402,340 |
| 21.000 | 422,450 |
| 22.000 | 442,570 |
| 23.000 | 462,690 |
| 24.000 | 482,800 |
| 25.000 | 502,920 |
| 26.000 | 523,040 |
| 27.000 | 543,150 |
| 28.000 | 563,270 |
| 29.000 | 583,390 |
| 30.000 | 603,500 |
| 31.000 | 623,620 |
| 32.000 | 643,740 |
| 33.000 | 663,850 |
| 34.000 | 683,970 |
| 35.000 | 704,090 |
| 36.000 | 724,200 |
| 37.000 | 744,320 |
| 38.000 | 764,440 |
| 39.000 | 784,560 |
| ch | mm |
|---|---|
| 40.000 | 804,670 |
| 41.000 | 824,790 |
| 42.000 | 844,910 |
| 43.000 | 865,020 |
| 44.000 | 885,140 |
| 45.000 | 905,260 |
| 46.000 | 925,370 |
| 47.000 | 945,490 |
| 48.000 | 965,610 |
| 49.000 | 985,720 |
| 50.000 | 1,005,800 |
| 51.000 | 1,026,000 |
| 52.000 | 1,046,100 |
| 53.000 | 1,066,200 |
| 54.000 | 1,086,300 |
| 55.000 | 1,106,400 |
| 56.000 | 1,126,500 |
| 57.000 | 1,146,700 |
| 58.000 | 1,166,800 |
| 59.000 | 1,186,900 |
| ch | mm |
|---|---|
| 60.000 | 1,207,000 |
| 61.000 | 1,227,100 |
| 62.000 | 1,247,200 |
| 63.000 | 1,267,400 |
| 64.000 | 1,287,500 |
| 65.000 | 1,307,600 |
| 66.000 | 1,327,700 |
| 67.000 | 1,347,800 |
| 68.000 | 1,367,900 |
| 69.000 | 1,388,100 |
| 70.000 | 1,408,200 |
| 71.000 | 1,428,300 |
| 72.000 | 1,448,400 |
| 73.000 | 1,468,500 |
| 74.000 | 1,488,600 |
| 75.000 | 1,508,800 |
| 76.000 | 1,528,900 |
| 77.000 | 1,549,000 |
| 78.000 | 1,569,100 |
| 79.000 | 1,589,200 |
Chains to Millimeters Conversion
Converting Chains (ch) to Millimeters (mm) is a common length conversion. 1 ch equals 20,116.8 mm. For example, 100 ch is equal to 2,011,680 mm.
Quick Mental Math: Chains to Millimeters
Multiply chains (surveying) by 20.1K to estimate millimeters.
Why is converting Chains to Millimeters tricky?
One unit is obscure or specialized, making the conversion unfamiliar to most people.
Quick Reference Values
1 ch = 20,116.8 mm. 5 ch = 100,584 mm. 10 ch = 201,168 mm. 25 ch = 502,920 mm. 50 ch = 1,005,840 mm. 100 ch = 2,011,680 mm.
What is Chains?
Chains (ch) is a unit of length. A chain is a unit of length equal to 66 feet or exactly 20.1168 meters. It was historically used in land surveying and equals 100 links. The chain is defined as 66 feet to maintain consistency with imperial measurements and is standardized for surveying purposes [nist-si-guide]. The chain was introduced by Edmund Gunter in 1620 to simplify land measurement and surveying. Adopted widely in English-speaking countries, it facilitated mapping and land division before metric units became prevalent [nist-si-guide]. Chains are primarily used in surveying and real estate in the United States, Canada, and parts of Australia. Although largely replaced by metric units globally, chains remain a legal unit in some jurisdictions for land records [nist-si-guide].
What is Millimeters?
Millimeters (mm) is a unit of length. A millimeter (mm) is a unit of length equal to one-thousandth of a meter, the SI base unit of length. It measures small distances and thicknesses with precision in engineering, manufacturing, and construction [bipm-si-brochure]. One millimeter equals exactly 0.001 meters or 10^-3 meters. The meter was defined in 1793 during the French Revolution, with the millimeter introduced as a decimal subdivision in the metric system. International standards bodies like BIPM later formalized its exact value to maintain global uniformity [bipm-si-brochure]. Millimeters are used worldwide in technical drawings, engineering specifications, and everyday measurements such as clothing and manufacturing tolerances. ISO standards mandate millimeter precision in many industrial applications [iso-80000].
Common Misspellings
People often search for this conversion using these alternate spellings: chaines, chian, chainz, chaine, milimeters, milimeter, millimter, mm. All of these refer to the Chains to Millimeters conversion.