# Ordinal Numbers

An Ordinal Number is a number that tells the position of something in a list, such as 1st, 2nd, 3rd, 4th, 5th, etc.

Ordinal numbers are important in multiple areas. The first use of ordinal numbers is to describe the order of objects, often written in the “figure” form. Another is to name exponents (e.g. 25 is “two to the fifth power”). Ordinal numbers are also used to name the denominators in fractions, often written in “full-word” form (e.g. one-third, three-fifths, six-tenths).

When ordinal numbers are written as figures the last two letters of the written ordinal are added to the cardinal number. Both the figure and the full-word formats are shown below.

The pattern established in the twenties continues for the rest of the numbers. These are called compound ordinals and only the last digit is written as an ordinal. For example, 345th is three hundred and forty-fifth.

## Ordinal Numbers From 1st to 100th

Number
Figure
Number
Word
Ordinal
Number
Word
Ordinal
Number
Figure
1onefirst1st
2twosecond2nd
3threethird3rd
4fourfourth4th
5fivefifth5th
6sixsixth6th
7sevenseventh7th
8eighteight8th
9nineninth9th
10tententh10th
11eleveneleventh11th
12twelvetwelfth12th
13thirteenthirteenth13th
14fourteenfourteenth14th
15fifteenfifteenth15th
16sixteensixteenth16th
17seventeenseventeenth17th
18eighteeneighteenth18th
19nineteennineteenth19th
20twentytwentieth20th
21twenty-onetwenty first21st
22twenty-twotwenty second22nd
23twenty-threetwenty third23rd
24twenty-fourtwenty fourth24th
25twenty-fivetwenty fifth25th
26twenty-sixtwenty sixth26th
27twenty-seventwenty seven27th
28twenty-eighttwenty eight28th
29twenty-ninetwenty ninth29th
30thirtythirtieth30th
31thirty-onethirty-first31st
32thirty-twothirty-second32nd
33thirty-threethirty-third33rd
34thirty-fourthirty-fourth34th
35thirty-fivethirty-fifth35th
36thirty-sixthirty-sixth36th
37thirty-seventhirty-seventh37th
38thirty-eightthirty-eighth38th
39thirty-ninethirty-ninth39th
40fortyfortieth40th
41forty-oneforty-first41st
42forty-twoforty-second42nd
43forty-threeforty-third43rd
44forty-fourforty-fourth44th
45forty-fiveforty-fifth45th
46forty-sixforty-sixth46th
47forty-sevenforty-seventh47th
48forty-eightforty-eighth48th
49forty-nineforty-ninth49th
50fiftyfiftieth50th
51fifty-onefifty- first51st
52fifty-twofifty-second52nd
53fifty-threefifty-third53rd
54fifty-fourfifty-fourth54th
55fifty-fivefifty-fifth55th
56fifty-sixfifty-sixth56th
57fifty-sevenfifty-seventh57th
58fifty-eightfifty-eighth58th
59fifty-ninefifty-ninth59th
60sixtysixtieth60th
61sixty-onesixtieth-one61st
62sixty-twosixtieth-second62nd
63sixty-threesixty-third63rd
64sixty-foursixty-fourth64th
65sixty-fivesixty-fiveth65th
66sixty-sixsixty-sixth66th
67sixty-sevensixty-seventh67th
68sixty-eightsixty-eighth68th
69sixty-ninesixty-ninth69th
70seventyseventieth70th
71seventy-oneseventh-first71st
72seventy-twoseventh-second71st
73seventy-threeseventh-third73rd
74seventy-fourseventh-fourth74th
75seventy-fiveseventh-fifth75th
76seventy-sixseventh-sixth76th
77seventy-sevenseventy–seventh77th
78seventy-eightseventy-eighth78th
79seventy-nineseventy-ninth79th
80eightyeightieth80th
81eighty-oneeighty-first81st
82eighty-twoeighty-second82nd
83eighty-threeeighty-third83rd
84eighty-foureighty-fourth84th
85eighty-fiveeighty-fifth85th
86eighty-sixeighty-sixth86th
87eighty-seveneighty-seventh87th
88eighty-eighteighty-eighth88th
89eighty-nineeighty-ninth89th
90ninetyninetieth90th
91ninety-oneninety-first91st
92ninety-twoninety-second92nd
93ninety-threeninety-third93rd
94ninety-fourninety-fourth94th
95ninety-fiveninety-fifth95th
96ninety-sixninety-sixth96th
97ninety-sevenninety-seventh97th
98ninety-eightninety-eighth98th
99ninety-nineninety-ninth99th
100one hundredone hundredth100th

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