| 单位名称 | 符号 | |
|---|---|---|
| 飞米 | fm | 1 fm = 0.001 pm = 1×10-15 m 1 飞米 = 1 费米 |
| 皮米 | pm | 1 pm = 0.001 nm = 1×10-12 m |
| 纳米 | nm | 1 nm = 0.001 µm = 0.000001 mm = 1×10-9 m |
| 微米 | µm | 1 µm = 0.001 mm = 1000 nm = 1×10-6 m |
| 毫米 | mm | 1 mm = 0.001 m = 0.1 cm = 1000 µm = 1×10-3 m |
| 厘米 | cm | 1 cm = 0.01 m = 10 mm = 1×10-2 m |
| 米 | m | 光在真空中以 1/299,792,458 秒的速度传播的路径长度 |
| 公里 | km | 1 km = 1000 m = 1×103 m |
| 英寸 | in | 1 in = 25.4 mm 1 in = 1/36 yd = 1/12 ft |
| 英尺 | ft | 1 ft = 0.3048 m 1 ft = 12 in = 1/3 yd |
| 码 | yd | 1 yd = 0.9144 m 1 yd = 3 ft = 36 in |
| 英里 | mi | 1 mi = 1,609.344 m 1 mi = 1,760 yd = 5,280 ft |
| 英絲 | thou | 1 thou = 25.4 µm 1 thou = 1×10-3 in |
| 密耳 | mil | 1 thou = 25.4 µm 1 thou = 1×10-3 in |
| 杆 | rod | 1 rod = 5.0292 m 1 rod = 1 pole = 1 perch = 16.5 ft |
| 链 | ch | 1 ch = 20.1168 m 1 ch = 66 ft |
| 弗隆 | fur | 1 fur = 201.168 m 1 fur = 10 ch = 220 yd = 660 ft |
| 里格 | lea | 1 lea = 4.828032 km 1 lea = 3 mi |
| 天文单位 | au | 1 au = 149,597,870,700 m |
| 光年 | ly | 1 ly = 9,460,730,472,580,800 m = 9.4607304725808×1015 m |
| 秒差距 | pc | 1 pc = 648000/π au ≒ 30,856,775,814,913,673 m |
| 海里 | M | 1 M = 1,852 m |
| 噚 | fath | 1 fath = 6 ft = 1.8288 m |
| 埃米 | Å | 1 Å = 1×10-10 m = 0.1 nm = 100 pm |
| ユカワ(Yukawa) | Y | 1 Y = 1×10-15 m = 1 fm |
| 点 | pt | 1pt = 1/72 in = 25.4/72 mm |
| 寸(Sun) | 寸 | 1 寸 = 1/10 尺 = 1/33 m ≒ 3.0303 cm |
| 尺(Shaku) | 尺 | 1 尺 = 10/33 m ≒ 30.303 cm |
| 鯨尺(Kujirajaku) | 鯨尺 | 1鯨尺 = 1.25 尺 = 25/66 m ≒ 37.8788 cm |
| 間(Ken) | 間 | 1 間 = 6 尺 ≒ 1.818 m |
| 尋(Hiro) | 尋 | 1 尋 = 6 尺 ≒ 1.818 m |
| 丈(Jo) | 丈 | 1 丈 = 10 尺 ≒ 3.0303 m |
| 町(Cho) | 町 | 1 町 = 60 間 = 360 尺 ≒ 109.09 m |
| 里(Ri) | 里 | 1里 = 36 町 = 12960尺 ≒ 3927.2727 m |
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