Ordinal Number Calculator

Work out ordinal number instantly with clear inputs, formula shown and shareable results.

About Ordinal Number Calculator

English ordinals take -st, -nd or -rd for numbers ending in 1, 2 or 3, and -th otherwise. The teens 11, 12 and 13 are exceptions and always take -th.

Formula

Suffix rule

ends 11–13 → th; else ends 1 → st, 2 → nd, 3 → rd, otherwise th

Worked example

With the default values below, Ordinal Number Calculator returns Ordinal form of 23rd. Change any input above and every figure here is recalculated in your browser.

Inputs used

Cardinal number: 23
How many following ordinals to listaccepts 1–20: 3

Results

Ordinal form: 23rd
Suffix: rd
Following ordinals: 24th, 25th, 26th
Cardinal value: 23

Step by step

1Values used
2Suffix rule
3Ordinal form= 23rd
4Suffix= rd
5Following ordinals= 24th, 25th, 26th
6Cardinal value= 23

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What is the ordinal of 23?

23rd, because it ends in 3 and is not in the 11–13 exception band.

Why is 113 'th' and not 'rd'?

Because its last two digits are 13, which falls in the teen exception.