| rood | 1 ro | 2 ro | 3 ro | 4 ro | 5 ro | 6 ro | 7 ro | 8 ro | 9 ro | 10 ro | 11 ro | 12 ro | 13 ro | 14 ro | 15 ro | 16 ro | 17 ro | 18 ro | 19 ro | 20 ro | 21 ro | 22 ro | 23 ro | 24 ro | 25 ro | 26 ro | 27 ro | 28 ro | 29 ro | 30 ro | 31 ro | 32 ro | 33 ro | 34 ro | 35 ro | 36 ro | 37 ro | 38 ro | 39 ro | 40 ro | 41 ro | 42 ro | 43 ro | 44 ro | 45 ro | 46 ro | 47 ro | 48 ro | 49 ro | 50 ro | 51 ro | 52 ro | 53 ro | 54 ro | 55 ro | 56 ro | 57 ro | 58 ro | 59 ro | 60 ro | 61 ro | 62 ro | 63 ro | 64 ro | 65 ro | 66 ro | 67 ro | 68 ro | 69 ro | 70 ro | 71 ro | 72 ro | 73 ro | 74 ro | 75 ro | 76 ro | 77 ro | 78 ro | 79 ro | 80 ro | 81 ro | 82 ro | 83 ro | 84 ro | 85 ro | 86 ro | 87 ro | 88 ro | 89 ro | 90 ro | 91 ro | 92 ro | 93 ro | 94 ro | 95 ro | 96 ro | 97 ro | 98 ro | 99 ro | 100 ro |
| barn | 1.0117141056 × 1031 b | 2.0234282112 × 1031 b | 3.0351423168 × 1031 b | 4.0468564224 × 1031 b | 5.058570528 × 1031 b | 6.0702846336 × 1031 b | 7.0819987392 × 1031 b | 8.0937128448 × 1031 b | 9.1054269504 × 1031 b | 1.0117141056 × 1032 b | 1.11288551616 × 1032 b | 1.21405692672 × 1032 b | 1.31522833728 × 1032 b | 1.41639974784 × 1032 b | 1.5175711584 × 1032 b | 1.61874256896 × 1032 b | 1.71991397952 × 1032 b | 1.82108539008 × 1032 b | 1.92225680064 × 1032 b | 2.0234282112 × 1032 b | 2.12459962176 × 1032 b | 2.22577103232 × 1032 b | 2.32694244288 × 1032 b | 2.42811385344 × 1032 b | 2.529285264 × 1032 b | 2.63045667456 × 1032 b | 2.73162808512 × 1032 b | 2.83279949568 × 1032 b | 2.93397090624 × 1032 b | 3.0351423168 × 1032 b | 3.13631372736 × 1032 b | 3.23748513792 × 1032 b | 3.33865654848 × 1032 b | 3.43982795904 × 1032 b | 3.5409993696 × 1032 b | 3.64217078016 × 1032 b | 3.74334219072 × 1032 b | 3.84451360128 × 1032 b | 3.94568501184 × 1032 b | 4.0468564224 × 1032 b | 4.14802783296 × 1032 b | 4.24919924352 × 1032 b | 4.35037065408 × 1032 b | 4.45154206464 × 1032 b | 4.5527134752 × 1032 b | 4.65388488576 × 1032 b | 4.75505629632 × 1032 b | 4.85622770688 × 1032 b | 4.95739911744 × 1032 b | 5.058570528 × 1032 b | 5.15974193856 × 1032 b | 5.26091334912 × 1032 b | 5.36208475968 × 1032 b | 5.46325617024 × 1032 b | 5.5644275808 × 1032 b | 5.66559899136 × 1032 b | 5.76677040192 × 1032 b | 5.86794181248 × 1032 b | 5.96911322304 × 1032 b | 6.0702846336 × 1032 b | 6.17145604416 × 1032 b | 6.27262745472 × 1032 b | 6.37379886528 × 1032 b | 6.47497027584 × 1032 b | 6.5761416864 × 1032 b | 6.67731309696 × 1032 b | 6.77848450752 × 1032 b | 6.87965591808 × 1032 b | 6.98082732864 × 1032 b | 7.0819987392 × 1032 b | 7.18317014976 × 1032 b | 7.28434156032 × 1032 b | 7.38551297088 × 1032 b | 7.48668438144 × 1032 b | 7.587855792 × 1032 b | 7.68902720256 × 1032 b | 7.79019861312 × 1032 b | 7.89137002368 × 1032 b | 7.99254143424 × 1032 b | 8.0937128448 × 1032 b | 8.19488425536 × 1032 b | 8.29605566592 × 1032 b | 8.39722707648 × 1032 b | 8.49839848704 × 1032 b | 8.5995698976 × 1032 b | 8.70074130816 × 1032 b | 8.80191271872 × 1032 b | 8.90308412928 × 1032 b | 9.00425553984 × 1032 b | 9.1054269504 × 1032 b | 9.20659836096 × 1032 b | 9.30776977152 × 1032 b | 9.40894118208 × 1032 b | 9.51011259264 × 1032 b | 9.6112840032 × 1032 b | 9.71245541376 × 1032 b | 9.81362682432 × 1032 b | 9.91479823488 × 1032 b | 1.001596964544 × 1033 b | 1.0117141056 × 1033 b |
A rood /ˈruːd/ is an historic English and international inch-pound measure of area, as well as an archaic English measure of length.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| rood | ro | ≡ 1⁄4 ac | = 1011.7141056 m2 | Imperial/US |
| roods | barns | roods | barns |
|---|---|---|---|
| 1 | = 1.0117141056E+31 | 6 | = 6.0702846336E+31 |
| 2 | = 2.0234282112E+31 | 7 | = 7.0819987392E+31 |
| 3 | = 3.0351423168E+31 | 8 | = 8.0937128448E+31 |
| 4 | = 4.0468564224E+31 | 9 | = 9.1054269504E+31 |
| 5 | = 5.058570528E+31 | 10 | = 1.0117141056E+32 |
A barn (symbol: b) is a unit of area equal to 10−28 m2 (100 fm2). Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields of high-energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| barn | b | ≡ 10−28 m2 | ≡ 10−28 m2 | Nuclear Physics |
| barns | roods | barns | roods |
|---|---|---|---|
| 1 | = 9.8842152586866E-32 | 6 | = 5.930529155212E-31 |
| 2 | = 1.9768430517373E-31 | 7 | = 6.9189506810806E-31 |
| 3 | = 2.965264577606E-31 | 8 | = 7.9073722069493E-31 |
| 4 | = 3.9536861034746E-31 | 9 | = 8.895793732818E-31 |
| 5 | = 4.9421076293433E-31 | 10 | = 9.8842152586866E-31 |
| roods | barns |
|---|---|
| 1 | = 1.0117141056 × 1031 |
| 9.8842152586866 × 10-32 | = 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 …) |