perch | 1 per | 2 per | 3 per | 4 per | 5 per | 6 per | 7 per | 8 per | 9 per | 10 per | 11 per | 12 per | 13 per | 14 per | 15 per | 16 per | 17 per | 18 per | 19 per | 20 per | 21 per | 22 per | 23 per | 24 per | 25 per | 26 per | 27 per | 28 per | 29 per | 30 per | 31 per | 32 per | 33 per | 34 per | 35 per | 36 per | 37 per | 38 per | 39 per | 40 per | 41 per | 42 per | 43 per | 44 per | 45 per | 46 per | 47 per | 48 per | 49 per | 50 per | 51 per | 52 per | 53 per | 54 per | 55 per | 56 per | 57 per | 58 per | 59 per | 60 per | 61 per | 62 per | 63 per | 64 per | 65 per | 66 per | 67 per | 68 per | 69 per | 70 per | 71 per | 72 per | 73 per | 74 per | 75 per | 76 per | 77 per | 78 per | 79 per | 80 per | 81 per | 82 per | 83 per | 84 per | 85 per | 86 per | 87 per | 88 per | 89 per | 90 per | 91 per | 92 per | 93 per | 94 per | 95 per | 96 per | 97 per | 98 per | 99 per | 100 per |
acre-foot | 0.0005682 ac ft | 0.0011364 ac ft | 0.0017045 ac ft | 0.0022727 ac ft | 0.0028409 ac ft | 0.0034091 ac ft | 0.0039773 ac ft | 0.0045455 ac ft | 0.0051136 ac ft | 0.0056818 ac ft | 0.00625 ac ft | 0.0068182 ac ft | 0.0073864 ac ft | 0.0079545 ac ft | 0.0085227 ac ft | 0.0090909 ac ft | 0.0096591 ac ft | 0.0102273 ac ft | 0.0107955 ac ft | 0.0113636 ac ft | 0.0119318 ac ft | 0.0125 ac ft | 0.0130682 ac ft | 0.0136364 ac ft | 0.0142045 ac ft | 0.0147727 ac ft | 0.0153409 ac ft | 0.0159091 ac ft | 0.0164773 ac ft | 0.0170455 ac ft | 0.0176136 ac ft | 0.0181818 ac ft | 0.01875 ac ft | 0.0193182 ac ft | 0.0198864 ac ft | 0.0204545 ac ft | 0.0210227 ac ft | 0.0215909 ac ft | 0.0221591 ac ft | 0.0227273 ac ft | 0.0232955 ac ft | 0.0238636 ac ft | 0.0244318 ac ft | 0.025 ac ft | 0.0255682 ac ft | 0.0261364 ac ft | 0.0267045 ac ft | 0.0272727 ac ft | 0.0278409 ac ft | 0.0284091 ac ft | 0.0289773 ac ft | 0.0295455 ac ft | 0.0301136 ac ft | 0.0306818 ac ft | 0.03125 ac ft | 0.0318182 ac ft | 0.0323864 ac ft | 0.0329545 ac ft | 0.0335227 ac ft | 0.0340909 ac ft | 0.0346591 ac ft | 0.0352273 ac ft | 0.0357955 ac ft | 0.0363636 ac ft | 0.0369318 ac ft | 0.0375 ac ft | 0.0380682 ac ft | 0.0386364 ac ft | 0.0392045 ac ft | 0.0397727 ac ft | 0.0403409 ac ft | 0.0409091 ac ft | 0.0414773 ac ft | 0.0420455 ac ft | 0.0426136 ac ft | 0.0431818 ac ft | 0.04375 ac ft | 0.0443182 ac ft | 0.0448864 ac ft | 0.0454545 ac ft | 0.0460227 ac ft | 0.0465909 ac ft | 0.0471591 ac ft | 0.0477273 ac ft | 0.0482955 ac ft | 0.0488636 ac ft | 0.0494318 ac ft | 0.05 ac ft | 0.0505682 ac ft | 0.0511364 ac ft | 0.0517045 ac ft | 0.0522727 ac ft | 0.0528409 ac ft | 0.0534091 ac ft | 0.0539773 ac ft | 0.0545455 ac ft | 0.0551136 ac ft | 0.0556818 ac ft | 0.05625 ac ft | 0.0568182 ac ft |
A traditional unit of volume for stone and other masonry. A perch of masonry is the volume of a stone wall one perch (16 1⁄2 feet or 5.03 metres) long, 18 inches (45.7 cm) high, and 12 inches (30.5 cm) thick. This is equivalent to exactly 24 3⁄4 cubic feet (0.92 cubic yards; 0.70 cubic metres; 700 litres).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
perch | per | ≡ 16 1⁄2 ft × 1 1⁄2 ft × 1 ft | = 0.700841953152 m3 | Imperial/US |
perches | acre-feet | perches | acre-feet |
---|---|---|---|
1 | = 0.00056818181818182 | 6 | = 0.0034090909090909 |
2 | = 0.0011363636363636 | 7 | = 0.0039772727272727 |
3 | = 0.0017045454545455 | 8 | = 0.0045454545454545 |
4 | = 0.0022727272727273 | 9 | = 0.0051136363636364 |
5 | = 0.0028409090909091 | 10 | = 0.0056818181818182 |
The acre-foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, irrigation water, and river flows.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
acre-foot | ac ft | ≡ 1 ac x 1 ft = 43560 cu ft | = 1233.48183754752 m3 | Imperial/US |
acre-feet | perches | acre-feet | perches |
---|---|---|---|
1 | = 1760 | 6 | = 10560 |
2 | = 3520 | 7 | = 12320 |
3 | = 5280 | 8 | = 14080 |
4 | = 7040 | 9 | = 15840 |
5 | = 8800 | 10 | = 17600 |
perches | acre-feet |
---|---|
1 | = 0.0005682 |
1 760 | = 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 …) |