| foot, metric (short) | 1 smf | 2 smf | 3 smf | 4 smf | 5 smf | 6 smf | 7 smf | 8 smf | 9 smf | 10 smf | 11 smf | 12 smf | 13 smf | 14 smf | 15 smf | 16 smf | 17 smf | 18 smf | 19 smf | 20 smf | 21 smf | 22 smf | 23 smf | 24 smf | 25 smf | 26 smf | 27 smf | 28 smf | 29 smf | 30 smf | 31 smf | 32 smf | 33 smf | 34 smf | 35 smf | 36 smf | 37 smf | 38 smf | 39 smf | 40 smf | 41 smf | 42 smf | 43 smf | 44 smf | 45 smf | 46 smf | 47 smf | 48 smf | 49 smf | 50 smf | 51 smf | 52 smf | 53 smf | 54 smf | 55 smf | 56 smf | 57 smf | 58 smf | 59 smf | 60 smf | 61 smf | 62 smf | 63 smf | 64 smf | 65 smf | 66 smf | 67 smf | 68 smf | 69 smf | 70 smf | 71 smf | 72 smf | 73 smf | 74 smf | 75 smf | 76 smf | 77 smf | 78 smf | 79 smf | 80 smf | 81 smf | 82 smf | 83 smf | 84 smf | 85 smf | 86 smf | 87 smf | 88 smf | 89 smf | 90 smf | 91 smf | 92 smf | 93 smf | 94 smf | 95 smf | 96 smf | 97 smf | 98 smf | 99 smf | 100 smf |
| millimeter | 300 mm | 600 mm | 900 mm | 1 200 mm | 1 500 mm | 1 800 mm | 2 100 mm | 2 400 mm | 2 700 mm | 3 000 mm | 3 300 mm | 3 600 mm | 3 900 mm | 4 200 mm | 4 500 mm | 4 800 mm | 5 100 mm | 5 400 mm | 5 700 mm | 6 000 mm | 6 300 mm | 6 600 mm | 6 900 mm | 7 200 mm | 7 500 mm | 7 800 mm | 8 100 mm | 8 400 mm | 8 700 mm | 9 000 mm | 9 300 mm | 9 600 mm | 9 900 mm | 10 200 mm | 10 500 mm | 10 800 mm | 11 100 mm | 11 400 mm | 11 700 mm | 12 000 mm | 12 300 mm | 12 600 mm | 12 900 mm | 13 200 mm | 13 500 mm | 13 800 mm | 14 100 mm | 14 400 mm | 14 700 mm | 15 000 mm | 15 300 mm | 15 600 mm | 15 900 mm | 16 200 mm | 16 500 mm | 16 800 mm | 17 100 mm | 17 400 mm | 17 700 mm | 18 000 mm | 18 300 mm | 18 600 mm | 18 900 mm | 19 200 mm | 19 500 mm | 19 800 mm | 20 100 mm | 20 400 mm | 20 700 mm | 21 000 mm | 21 300 mm | 21 600 mm | 21 900 mm | 22 200 mm | 22 500 mm | 22 800 mm | 23 100 mm | 23 400 mm | 23 700 mm | 24 000 mm | 24 300 mm | 24 600 mm | 24 900 mm | 25 200 mm | 25 500 mm | 25 800 mm | 26 100 mm | 26 400 mm | 26 700 mm | 27 000 mm | 27 300 mm | 27 600 mm | 27 900 mm | 28 200 mm | 28 500 mm | 28 800 mm | 29 100 mm | 29 400 mm | 29 700 mm | 30 000 mm |
≡ 0.30 m
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| foot, metric (short) | smf | ≡ 0.30 m | ≡ 0.30 m | Metric system SI |
| feet, metric (short) | millimeters | feet, metric (short) | millimeters |
|---|---|---|---|
| 1 | ≡ 300 | 4 | ≡ 1200 |
| 1.5 | ≡ 450 | 4.5 | ≡ 1350 |
| 2 | ≡ 600 | 5 | ≡ 1500 |
| 2.5 | ≡ 750 | 5.5 | ≡ 1650 |
| 3 | ≡ 900 | 6 | ≡ 1800 |
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 | feet, metric (short) | millimeters | feet, metric (short) |
|---|---|---|---|
| 1 | ≡ 0.0033333333333333 | 4 | ≡ 0.013333333333333 |
| 1.5 | ≡ 0.005 | 4.5 | ≡ 0.015 |
| 2 | ≡ 0.0066666666666667 | 5 | ≡ 0.016666666666667 |
| 2.5 | ≡ 0.0083333333333333 | 5.5 | ≡ 0.018333333333333 |
| 3 | ≡ 0.01 | 6 | ≡ 0.02 |
| feet, metric (short) | millimeters |
|---|---|
| 1 | ≡ 300 |
| 0.0033333 | ≡ 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 …) |