| chain | 1 ch | 2 ch | 3 ch | 4 ch | 5 ch | 6 ch | 7 ch | 8 ch | 9 ch | 10 ch | 11 ch | 12 ch | 13 ch | 14 ch | 15 ch | 16 ch | 17 ch | 18 ch | 19 ch | 20 ch | 21 ch | 22 ch | 23 ch | 24 ch | 25 ch | 26 ch | 27 ch | 28 ch | 29 ch | 30 ch | 31 ch | 32 ch | 33 ch | 34 ch | 35 ch | 36 ch | 37 ch | 38 ch | 39 ch | 40 ch | 41 ch | 42 ch | 43 ch | 44 ch | 45 ch | 46 ch | 47 ch | 48 ch | 49 ch | 50 ch | 51 ch | 52 ch | 53 ch | 54 ch | 55 ch | 56 ch | 57 ch | 58 ch | 59 ch | 60 ch | 61 ch | 62 ch | 63 ch | 64 ch | 65 ch | 66 ch | 67 ch | 68 ch | 69 ch | 70 ch | 71 ch | 72 ch | 73 ch | 74 ch | 75 ch | 76 ch | 77 ch | 78 ch | 79 ch | 80 ch | 81 ch | 82 ch | 83 ch | 84 ch | 85 ch | 86 ch | 87 ch | 88 ch | 89 ch | 90 ch | 91 ch | 92 ch | 93 ch | 94 ch | 95 ch | 96 ch | 97 ch | 98 ch | 99 ch | 100 ch |
| span | 88.0001750 span | 176.0003500 span | 264.0005249 span | 352.0006999 span | 440.0008749 span | 528.0010499 span | 616.0012248 span | 704.0013998 span | 792.0015748 span | 880.0017498 span | 968.0019248 span | 1,056.0020997 span | 1,144.0022747 span | 1,232.0024497 span | 1,320.0026247 span | 1,408.0027997 span | 1,496.0029746 span | 1,584.0031496 span | 1,672.0033246 span | 1,760.0034996 span | 1,848.0036745 span | 1,936.0038495 span | 2,024.0040245 span | 2,112.0041995 span | 2,200.0043745 span | 2,288.0045494 span | 2,376.0047244 span | 2,464.0048994 span | 2,552.0050744 span | 2,640.0052493 span | 2,728.0054243 span | 2,816.0055993 span | 2,904.0057743 span | 2,992.0059493 span | 3,080.0061242 span | 3,168.0062992 span | 3,256.0064742 span | 3,344.0066492 span | 3,432.0068241 span | 3,520.0069991 span | 3,608.0071741 span | 3,696.0073491 span | 3,784.0075241 span | 3,872.0076990 span | 3,960.0078740 span | 4,048.0080490 span | 4,136.0082240 span | 4,224.0083990 span | 4,312.0085739 span | 4,400.0087489 span | 4,488.0089239 span | 4,576.0090989 span | 4,664.0092738 span | 4,752.0094488 span | 4,840.0096238 span | 4,928.0097988 span | 5,016.0099738 span | 5,104.0101487 span | 5,192.0103237 span | 5,280.0104987 span | 5,368.0106737 span | 5,456.0108486 span | 5,544.0110236 span | 5,632.0111986 span | 5,720.0113736 span | 5,808.0115486 span | 5,896.0117235 span | 5,984.0118985 span | 6,072.0120735 span | 6,160.0122485 span | 6,248.0124234 span | 6,336.0125984 span | 6,424.0127734 span | 6,512.0129484 span | 6,600.0131234 span | 6,688.0132983 span | 6,776.0134733 span | 6,864.0136483 span | 6,952.0138233 span | 7,040.0139983 span | 7,128.0141732 span | 7,216.0143482 span | 7,304.0145232 span | 7,392.0146982 span | 7,480.0148731 span | 7,568.0150481 span | 7,656.0152231 span | 7,744.0153981 span | 7,832.0155731 span | 7,920.0157480 span | 8,008.0159230 span | 8,096.0160980 span | 8,184.0162730 span | 8,272.0164479 span | 8,360.0166229 span | 8,448.0167979 span | 8,536.0169729 span | 8,624.0171479 span | 8,712.0173228 span | 8,800.0174978 span |
A chain is a unit of length. It measures 66 feet, or 22 yards, or 100 links, or 4 rods (20.1168 m). There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice.
| 1 chains ≈ 88.000174978128 spans | 4 chains ≈ 352.00069991251 spans |
| 1.5 chains ≈ 132.00026246719 spans | 4.5 chains ≈ 396.00078740157 spans |
| 2 chains ≈ 176.00034995626 spans | 5 chains ≈ 440.00087489064 spans |
| 2.5 chains ≈ 220.00043744532 spans | 5.5 chains ≈ 484.0009623797 spans |
| 3 chains ≈ 264.00052493438 spans | 6 chains ≈ 528.00104986877 spans |
A span is the distance measured by a human hand, from the tip of the thumb to the tip of the little finger. In ancient times, a span was considered to be half a cubit. Sometimes the distinction is made between the great span (thumb to little finger) and little span (index finger to little finger).
| 1 spans ≈ 0.011363613768365 chains | 4 spans ≈ 0.045454455073461 chains |
| 1.5 spans ≈ 0.017045420652548 chains | 4.5 spans ≈ 0.051136261957643 chains |
| 2 spans ≈ 0.02272722753673 chains | 5 spans ≈ 0.056818068841826 chains |
| 2.5 spans ≈ 0.028409034420913 chains | 5.5 spans ≈ 0.062499875726009 chains |
| 3 spans ≈ 0.034090841305096 chains | 6 spans ≈ 0.068181682610191 chains |
| 1 chains ≈ 88.0001750 spans |
| 1 spans ≈ 0.0113636 chains |