The metre (international spelling) or meter (American spelling) (from the Greek noun μέτρον, "measure") is the base unit of length in the International System of Units (SI). The SI unit symbol is m. The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 seconds.
| 英里 | 米 | 分米 | 納米 | 厘米 | 千分尺 | 碼 | 海裡 |
|---|---|---|---|---|---|---|---|
| 1 | 1,609.344 | 16,093.44 | 1 609 344 000 000 | 160,934.4 | 1 609 344 000 | 1 760 | 0.8689762 |
| 0.0006214 | 1 | 10 | 1 000 000 000 | 100 | 1 000 000 | 1.0936133 | 0.0005400 |
| 6.2137119223733 × 10-5 | 0.1 | 1 | 100 000 000 | 10 | 100 000 | 0.1093613 | 5.3995680345572 × 10-5 |
| 6.2137119223733 × 10-13 | 1.0 × 10-9 | 1.0 × 10-8 | 1 | 1.0 × 10-7 | 0.001 | 1.0936132983377 × 10-9 | 5.3995680345572 × 10-13 |
| 6.2137119223733 × 10-6 | 0.01 | 0.1 | 10 000 000 | 1 | 10 000 | 0.0109361 | 5.3995680345572 × 10-6 |
| 6.2137119223733 × 10-10 | 1.0 × 10-6 | 1.0 × 10-5 | 1 000 | 0.0001 | 1 | 1.0936132983377 × 10-6 | 5.3995680345572 × 10-10 |
| 0.0005682 | 0.9144 | 9.144 | 914 400 000 | 91.44 | 914 400 | 1 | 0.0004937 |
| 1.1507794 | 1 852 | 18 520 | 1 852 000 000 000 | 185 200 | 1 852 000 000 | 2,025.3718285 | 1 |