| millimeter | 1 mm | 2 mm | 3 mm | 4 mm | 5 mm | 6 mm | 7 mm | 8 mm | 9 mm | 10 mm | 11 mm | 12 mm | 13 mm | 14 mm | 15 mm | 16 mm | 17 mm | 18 mm | 19 mm | 20 mm | 21 mm | 22 mm | 23 mm | 24 mm | 25 mm | 26 mm | 27 mm | 28 mm | 29 mm | 30 mm | 31 mm | 32 mm | 33 mm | 34 mm | 35 mm | 36 mm | 37 mm | 38 mm | 39 mm | 40 mm | 41 mm | 42 mm | 43 mm | 44 mm | 45 mm | 46 mm | 47 mm | 48 mm | 49 mm | 50 mm | 51 mm | 52 mm | 53 mm | 54 mm | 55 mm | 56 mm | 57 mm | 58 mm | 59 mm | 60 mm | 61 mm | 62 mm | 63 mm | 64 mm | 65 mm | 66 mm | 67 mm | 68 mm | 69 mm | 70 mm | 71 mm | 72 mm | 73 mm | 74 mm | 75 mm | 76 mm | 77 mm | 78 mm | 79 mm | 80 mm | 81 mm | 82 mm | 83 mm | 84 mm | 85 mm | 86 mm | 87 mm | 88 mm | 89 mm | 90 mm | 91 mm | 92 mm | 93 mm | 94 mm | 95 mm | 96 mm | 97 mm | 98 mm | 99 mm | 100 mm |
| ell | 0.0008749 ell | 0.0017498 ell | 0.0026247 ell | 0.0034996 ell | 0.0043745 ell | 0.0052493 ell | 0.0061242 ell | 0.0069991 ell | 0.0078740 ell | 0.0087489 ell | 0.0096238 ell | 0.0104987 ell | 0.0113736 ell | 0.0122485 ell | 0.0131234 ell | 0.0139983 ell | 0.0148731 ell | 0.0157480 ell | 0.0166229 ell | 0.0174978 ell | 0.0183727 ell | 0.0192476 ell | 0.0201225 ell | 0.0209974 ell | 0.0218723 ell | 0.0227472 ell | 0.0236220 ell | 0.0244969 ell | 0.0253718 ell | 0.0262467 ell | 0.0271216 ell | 0.0279965 ell | 0.0288714 ell | 0.0297463 ell | 0.0306212 ell | 0.0314961 ell | 0.0323710 ell | 0.0332458 ell | 0.0341207 ell | 0.0349956 ell | 0.0358705 ell | 0.0367454 ell | 0.0376203 ell | 0.0384952 ell | 0.0393701 ell | 0.0402450 ell | 0.0411199 ell | 0.0419948 ell | 0.0428696 ell | 0.0437445 ell | 0.0446194 ell | 0.0454943 ell | 0.0463692 ell | 0.0472441 ell | 0.0481190 ell | 0.0489939 ell | 0.0498688 ell | 0.0507437 ell | 0.0516185 ell | 0.0524934 ell | 0.0533683 ell | 0.0542432 ell | 0.0551181 ell | 0.0559930 ell | 0.0568679 ell | 0.0577428 ell | 0.0586177 ell | 0.0594926 ell | 0.0603675 ell | 0.0612423 ell | 0.0621172 ell | 0.0629921 ell | 0.0638670 ell | 0.0647419 ell | 0.0656168 ell | 0.0664917 ell | 0.0673666 ell | 0.0682415 ell | 0.0691164 ell | 0.0699913 ell | 0.0708661 ell | 0.0717410 ell | 0.0726159 ell | 0.0734908 ell | 0.0743657 ell | 0.0752406 ell | 0.0761155 ell | 0.0769904 ell | 0.0778653 ell | 0.0787402 ell | 0.0796150 ell | 0.0804899 ell | 0.0813648 ell | 0.0822397 ell | 0.0831146 ell | 0.0839895 ell | 0.0848644 ell | 0.0857393 ell | 0.0866142 ell | 0.0874891 ell |
The millimetre (International spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. Therefore there are thousand millimetres in a metre. There are ten millimetres in a centimetre.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| millimeter | mm | ≡ 1×10-3 m ≡ 0.001 m | ≡ 1×10-3 m ≡ 0.001 m | Metric system SI |
| millimeters | ell | millimeters | ell |
|---|---|---|---|
| 1 | = 0.00087489063867017 | 4 | = 0.0034995625546807 |
| 1.5 | = 0.0013123359580052 | 4.5 | = 0.0039370078740157 |
| 2 | = 0.0017497812773403 | 5 | = 0.0043744531933508 |
| 2.5 | = 0.0021872265966754 | 5.5 | = 0.0048118985126859 |
| 3 | = 0.0026246719160105 | 6 | = 0.005249343832021 |
An ell (from Proto-Germanic *alinō, cognate with Latin ulna) is a unit of measurement, originally a cubit, i.e., approximating the length of a man's arm from the elbow ("elbow" means the bend or bow of the ell or arm) to the tip of the middle finger, or about 18 inches (457 mm); in later usage, any of several longer units.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| ell | ell | ≡ 45 in (In England usually) | = 1.143 m | Other (Length) |
| ell | millimeters | ell | millimeters |
|---|---|---|---|
| 1 | = 1143 | 4 | = 4572 |
| 1.5 | = 1714.5 | 4.5 | = 5143.5 |
| 2 | = 2286 | 5 | = 5715 |
| 2.5 | = 2857.5 | 5.5 | = 6286.5 |
| 3 | = 3429 | 6 | = 6858 |
| millimeters | ell |
|---|---|
| 1 | = 0.0008749 |
| 1 143 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |