| acre-foot | 1 ac ft | 2 ac ft | 3 ac ft | 4 ac ft | 5 ac ft | 6 ac ft | 7 ac ft | 8 ac ft | 9 ac ft | 10 ac ft | 11 ac ft | 12 ac ft | 13 ac ft | 14 ac ft | 15 ac ft | 16 ac ft | 17 ac ft | 18 ac ft | 19 ac ft | 20 ac ft | 21 ac ft | 22 ac ft | 23 ac ft | 24 ac ft | 25 ac ft | 26 ac ft | 27 ac ft | 28 ac ft | 29 ac ft | 30 ac ft | 31 ac ft | 32 ac ft | 33 ac ft | 34 ac ft | 35 ac ft | 36 ac ft | 37 ac ft | 38 ac ft | 39 ac ft | 40 ac ft | 41 ac ft | 42 ac ft | 43 ac ft | 44 ac ft | 45 ac ft | 46 ac ft | 47 ac ft | 48 ac ft | 49 ac ft | 50 ac ft | 51 ac ft | 52 ac ft | 53 ac ft | 54 ac ft | 55 ac ft | 56 ac ft | 57 ac ft | 58 ac ft | 59 ac ft | 60 ac ft | 61 ac ft | 62 ac ft | 63 ac ft | 64 ac ft | 65 ac ft | 66 ac ft | 67 ac ft | 68 ac ft | 69 ac ft | 70 ac ft | 71 ac ft | 72 ac ft | 73 ac ft | 74 ac ft | 75 ac ft | 76 ac ft | 77 ac ft | 78 ac ft | 79 ac ft | 80 ac ft | 81 ac ft | 82 ac ft | 83 ac ft | 84 ac ft | 85 ac ft | 86 ac ft | 87 ac ft | 88 ac ft | 89 ac ft | 90 ac ft | 91 ac ft | 92 ac ft | 93 ac ft | 94 ac ft | 95 ac ft | 96 ac ft | 97 ac ft | 98 ac ft | 99 ac ft | 100 ac ft |
| US cup | 5,213,622.8571429 c (US) | 10,427,245.714286 c (US) | 15,640,868.571429 c (US) | 20,854,491.428571 c (US) | 26,068,114.285714 c (US) | 31,281,737.142857 c (US) | 36 495 360 c (US) | 41,708,982.857143 c (US) | 46,922,605.714286 c (US) | 52,136,228.571429 c (US) | 57,349,851.428571 c (US) | 62,563,474.285714 c (US) | 67,777,097.142857 c (US) | 72 990 720 c (US) | 78,204,342.857143 c (US) | 83,417,965.714286 c (US) | 88,631,588.571429 c (US) | 93,845,211.428571 c (US) | 99,058,834.285714 c (US) | 104,272,457.14286 c (US) | 109 486 080 c (US) | 114,699,702.85714 c (US) | 119,913,325.71429 c (US) | 125,126,948.57143 c (US) | 130,340,571.42857 c (US) | 135,554,194.28571 c (US) | 140,767,817.14286 c (US) | 145 981 440 c (US) | 151,195,062.85714 c (US) | 156,408,685.71429 c (US) | 161,622,308.57143 c (US) | 166,835,931.42857 c (US) | 172,049,554.28571 c (US) | 177,263,177.14286 c (US) | 182 476 800 c (US) | 187,690,422.85714 c (US) | 192,904,045.71429 c (US) | 198,117,668.57143 c (US) | 203,331,291.42857 c (US) | 208,544,914.28571 c (US) | 213,758,537.14286 c (US) | 218 972 160 c (US) | 224,185,782.85714 c (US) | 229,399,405.71429 c (US) | 234,613,028.57143 c (US) | 239,826,651.42857 c (US) | 245,040,274.28571 c (US) | 250,253,897.14286 c (US) | 255 467 520 c (US) | 260,681,142.85714 c (US) | 265,894,765.71429 c (US) | 271,108,388.57143 c (US) | 276,322,011.42857 c (US) | 281,535,634.28571 c (US) | 286,749,257.14286 c (US) | 291 962 880 c (US) | 297,176,502.85714 c (US) | 302,390,125.71429 c (US) | 307,603,748.57143 c (US) | 312,817,371.42857 c (US) | 318,030,994.28571 c (US) | 323,244,617.14286 c (US) | 328 458 240 c (US) | 333,671,862.85714 c (US) | 338,885,485.71429 c (US) | 344,099,108.57143 c (US) | 349,312,731.42857 c (US) | 354,526,354.28571 c (US) | 359,739,977.14286 c (US) | 364 953 600 c (US) | 370,167,222.85714 c (US) | 375,380,845.71429 c (US) | 380,594,468.57143 c (US) | 385,808,091.42857 c (US) | 391,021,714.28571 c (US) | 396,235,337.14286 c (US) | 401 448 960 c (US) | 406,662,582.85714 c (US) | 411,876,205.71429 c (US) | 417,089,828.57143 c (US) | 422,303,451.42857 c (US) | 427,517,074.28571 c (US) | 432,730,697.14286 c (US) | 437 944 320 c (US) | 443,157,942.85714 c (US) | 448,371,565.71429 c (US) | 453,585,188.57143 c (US) | 458,798,811.42857 c (US) | 464,012,434.28571 c (US) | 469,226,057.14286 c (US) | 474 439 680 c (US) | 479,653,302.85714 c (US) | 484,866,925.71429 c (US) | 490,080,548.57143 c (US) | 495,294,171.42857 c (US) | 500,507,794.28571 c (US) | 505,721,417.14286 c (US) | 510 935 040 c (US) | 516,148,662.85714 c (US) | 521,362,285.71429 c (US) |
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 | US cups | acre-feet | US cups |
|---|---|---|---|
| 1 | = 5213622.8571429 | 6 | = 31281737.142857 |
| 2 | = 10427245.714286 | 7 | = 36495360 |
| 3 | = 15640868.571429 | 8 | = 41708982.857143 |
| 4 | = 20854491.428571 | 9 | = 46922605.714286 |
| 5 | = 26068114.285714 | 10 | = 52136228.571429 |
In the United States, the customary cup is half of a liquid pint.
| 1 U.S. customary cup | = | 1⁄16 | U.S. customary gallon |
| = | 1⁄4 | U.S. customary quart | |
| = | 1⁄2 | U.S. customary pint | |
| = | 8 | U.S. customary fluid ounces | |
| = | 16 | U.S. customary tablespoons | |
| = | 48 | U.S. customary teaspoons | |
| ≡ | 236.5882365 | millilitres exactly | |
| ≈ | 15 2⁄3 | international tablespoons | |
| ≈ | 11.75 | Australian tablespoons | |
| ≈ | 0.833 | imperial cups | |
| ≈ | 8.33 | imperial fluid ounces |
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| US cup | c (US) | ≡ 8 US fl oz ≡ 1⁄16 gal (US) | = 236.5882365×10−6 m3 | Imperial/US |
| US cups | acre-feet | US cups | acre-feet |
|---|---|---|---|
| 1 | = 1.9180520482604E-7 | 6 | = 1.1508312289562E-6 |
| 2 | = 3.8361040965208E-7 | 7 | = 1.3426364337823E-6 |
| 3 | = 5.7541561447811E-7 | 8 | = 1.5344416386083E-6 |
| 4 | = 7.6722081930415E-7 | 9 | = 1.7262468434343E-6 |
| 5 | = 9.5902602413019E-7 | 10 | = 1.9180520482604E-6 |
| acre-feet | US cups |
|---|---|
| 1 | = 5,213,622.8571429 |
| 1.9180520482604 × 10-7 | = 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 …) |