Ordinal Numbers: Position and Order in Everyday Life
Ordinal numbers indicate position, not quantity. First, second, third — we use ordinals for floors, rankings, calendars, and much more. Learn how to write, abbreviate, and use them correctly in English.
Renato Freitas
Updated on May 5, 2026
Cardinal vs. ordinal: quantity vs. position
Cardinal numbers answer the question 'how many?': there are 5 students in line. Ordinal numbers answer 'what position?': John is 3rd in line. This distinction seems simple, but it is essential for correctly interpreting texts, rankings, and addresses.
In English, ordinals are formed by adding suffixes to the cardinal: 1st, 2nd, 3rd, 4th, 5th... The spelling follows consistent rules — 'first', 'second', and 'third' are irregular, while from 'fourth' onward most simply add '-th'. This makes English ordinals relatively straightforward to learn.
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Ordinal numbers in English
The first ten ordinals in English have forms that need to be learned: first (1st), second (2nd), third (3rd), fourth (4th), fifth (5th), sixth (6th), seventh (7th), eighth (8th), ninth (9th), tenth (10th).
From 11 onward, most ordinals are formed by adding '-th' to the cardinal: eleventh (11th), twelfth (12th), thirteenth (13th)... twentieth (20th), twenty-first (21st)... thirtieth (30th), fortieth (40th), fiftieth (50th), sixtieth (60th), seventieth (70th), eightieth (80th), ninetieth (90th), hundredth (100th).
In written text, abbreviated forms use a superscript suffix after the numeral: 1st, 2nd, 3rd, 4th, 25th, 100th. The suffix matches the spoken ending of the ordinal word.
- 1st — first
- 2nd — second
- 3rd — third
- 10th — tenth
- 20th — twentieth
- 100th — hundredth
Ordinals in everyday life
We use ordinals constantly without noticing. Building floors: 'I live on the 8th floor'. Dates: 'the 1st of May'. Race placement: 'finished in 2nd place'. Book chapters: 'the third chapter'. Monarchs: 'King Henry VIII' read as 'King Henry the Eighth'.
In addresses, 'Main Street, 2nd floor' uses an ordinal. In rankings: '1st place in the competition'. In sports: 'won the 4th consecutive title'. In historical contexts: 'the 21st century'.
In English, ordinals are used for the day of the month in formal and some informal speech ('the 5th of November', 'May 1st'), though written dates often omit the ordinal suffix in informal style ('May 5' rather than 'May 5th').
Large ordinals and Roman numerals
For very large ordinals, written text prefers the abbreviated form (25th) over the written-out form (twenty-fifth), which becomes lengthy. In formal documents such as laws and decrees, forms like '101st' (one hundred and first) appear.
Roman numerals also function as ordinals in many contexts: monarchs (Louis XIV = 'the Fourteenth'), popes (John Paul II = 'the Second'), centuries (the XIX century = 'the nineteenth'), volumes of books (Volume III). Reading Roman numerals is a natural extension of studying ordinals.
Frequently asked questions
When do we use ordinals vs. cardinals for dates in English?
In formal speech and writing, the day of the month is often spoken as an ordinal ('the fifth of May', 'May fifth'), but written as a cardinal in informal style ('May 5'). The first day of the month is consistently 'the 1st' in both formal and informal contexts.
What is the difference between '2nd' and 'second'?
'2nd' is the abbreviated written form, while 'second' is the full word. Both refer to the same ordinal. Use the full word in formal writing and the abbreviation in tables, addresses, or informal text.
How do I read '2nd Civil Court'?
'Second Civil Court'. The ordinal 2nd modifies the noun 'court'. In legal and administrative language, ordinals are very common and should be read out as full words.
How many ordinals do I need for everyday life?
The first 20 (first through twentieth) cover most everyday situations: building floors, positions on a list, dates, chapter numbers. Knowing up to hundredth helps in more formal contexts.
Do ordinals apply to fractions? Is '1/3' 'one third' or 'the first third'?
The words are the same, but the meaning differs. 'One third' (1/3) is a fraction — an ordinal used as a fractional denominator. 'The first third of the century' is a position in time. Context resolves the ambiguity.
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