interval name  size (steps)  size (cents) just ratio  just (cents)   error
0                     perfect fifth            24        702.44        3:2        701.96  + 0.48
1                  septimal tritone            20        585.37        7:5        582.51  + 2.85
2                  11:8 wide fourth            19        556.10       11:8        551.32  + 4.78
3                 15:11 wide fourth            18        526.83      15:11        536.95   10.12
4                 27:20 wide fourth            18        526.83      27:20        519.55  + 7.28
5                    perfect fourth            17        497.56        4:3        498.04    0.48
6            septimal narrow fourth            16        468.29      21:16        470.78    2.48
7              septimal major third            15        439.02        9:7        435.08  + 3.94
8             undecimal major third            14        409.76      14:11        417.51    7.75
9           pythagorean major third            14        409.76      81:64        407.82  + 1.94
10                      major third            13        380.49        5:4        386.31    5.83
11           inverted 13th harmonic            12        351.22      16:13        359.47    8.25
12          undecimal neutral third            12        351.22       11:9        347.41  + 3.81
13                      minor third            11        321.95        6:5        315.64  + 6.31
14          pythagorean minor third            10        292.68      32:27        294.13    1.45
15           tridecimal minor third            10        292.68      13:11        289.21  + 3.47
16             septimal minor third             9        263.41        7:6        266.87    3.46
17              septimal whole tone             8        234.15        8:7        231.17  + 2.97
18          whole tone , major tone             7        204.88        9:8        203.91  + 0.97
19          whole tone , minor tone             6        175.61       10:9        182.40    6.79
20  lesser undecimal neutral second             5        146.34      12:11        150.64    4.30
21       septimal diatonic semitone             4        117.07      15:14        119.44    2.37
22                diatonic semitone             4        117.07      16:15        111.73  + 5.34
23    pythagorean diatonic semitone             3         87.80    256:243         90.22    2.42
24      septimal chromatic semitone             3         87.80      21:20         84.47  + 3.34
25               chromatic semitone             2         58.54      25:24         70.67   12.14
26                   28:27 semitone             2         58.54      28:27         62.96    4.42
27                   septimal comma             1         29.27      64:63         27.26  + 2.00

Table as JSON:
{"interval name":{"0":"perfect fifth","1":"septimal tritone","2":"11:8 wide fourth","3":"15:11 wide fourth","4":"27:20 wide fourth","5":"perfect fourth","6":"septimal narrow fourth","7":"septimal major third","8":"undecimal major third","9":"pythagorean major third","10":"major third","11":"inverted 13th harmonic","12":"undecimal neutral third","13":"minor third","14":"pythagorean minor third","15":"tridecimal minor third","16":"septimal minor third","17":"septimal whole tone","18":"whole tone , major tone","19":"whole tone , minor tone","20":"lesser undecimal neutral second","21":"septimal diatonic semitone","22":"diatonic semitone","23":"pythagorean diatonic semitone","24":"septimal chromatic semitone","25":"chromatic semitone","26":"28:27 semitone","27":"septimal comma"},"size (steps)":{"0":24,"1":20,"2":19,"3":18,"4":18,"5":17,"6":16,"7":15,"8":14,"9":14,"10":13,"11":12,"12":12,"13":11,"14":10,"15":10,"16":9,"17":8,"18":7,"19":6,"20":5,"21":4,"22":4,"23":3,"24":3,"25":2,"26":2,"27":1},"size (cents)":{"0":702.44,"1":585.37,"2":556.1,"3":526.83,"4":526.83,"5":497.56,"6":468.29,"7":439.02,"8":409.76,"9":409.76,"10":380.49,"11":351.22,"12":351.22,"13":321.95,"14":292.68,"15":292.68,"16":263.41,"17":234.15,"18":204.88,"19":175.61,"20":146.34,"21":117.07,"22":117.07,"23":87.8,"24":87.8,"25":58.54,"26":58.54,"27":29.27},"just ratio":{"0":"3:2","1":"7:5","2":"11:8","3":"15:11","4":"27:20","5":"4:3","6":"21:16","7":"9:7","8":"14:11","9":"81:64","10":"5:4","11":"16:13","12":"11:9","13":"6:5","14":"32:27","15":"13:11","16":"7:6","17":"8:7","18":"9:8","19":"10:9","20":"12:11","21":"15:14","22":"16:15","23":"256:243","24":"21:20","25":"25:24","26":"28:27","27":"64:63"},"just (cents)":{"0":701.96,"1":582.51,"2":551.32,"3":536.95,"4":519.55,"5":498.04,"6":470.78,"7":435.08,"8":417.51,"9":407.82,"10":386.31,"11":359.47,"12":347.41,"13":315.64,"14":294.13,"15":289.21,"16":266.87,"17":231.17,"18":203.91,"19":182.4,"20":150.64,"21":119.44,"22":111.73,"23":90.22,"24":84.47,"25":70.67,"26":62.96,"27":27.26},"error":{"0":"+ 0.48","1":"+ 2.85","2":"+ 4.78","3":"10.12","4":"+ 7.28","5":"0.48","6":"2.48","7":"+ 3.94","8":"7.75","9":"+ 1.94","10":"5.83","11":"8.25","12":"+ 3.81","13":"+ 6.31","14":"1.45","15":"+ 3.47","16":"3.46","17":"+ 2.97","18":"+ 0.97","19":"6.79","20":"4.30","21":"2.37","22":"+ 5.34","23":"2.42","24":"+ 3.34","25":"12.14","26":"4.42","27":"+ 2.00"}}