Pluralizer
Convert singular English words to their plural form. Supports regular and many irregular English pluralization rules with one click.
About Pluralizer
Our free Pluralizer tool converts singular English words into their correct plural forms. It handles regular pluralization patterns (adding -s or -es) as well as many irregular forms, including words ending in -y, -f/-fe, -us, -is, -ix/-ex, and common irregular nouns like child/children, mouse/mice, and person/people.
English pluralization follows several rules: most nouns simply add -s; nouns ending in s, x, z, ch, or sh add -es; words ending in consonant + y change y to ies; words ending in f or fe change to ves; and many words borrowed from Latin and Greek have special plural forms. This tool applies these rules automatically and shows which rule was used.
Whether you're writing content, learning English, or building applications that need automatic pluralization, this tool provides instant results with clear explanations of the grammatical rules applied. All processing happens in your browser for immediate feedback.
Frequently Asked Questions
Q Does the tool handle irregular plurals?
Yes, the tool includes a comprehensive dictionary of common irregular English plurals such as child→children, person→people, mouse→mice, tooth→teeth, foot→feet, goose→geese, man→men, woman→women, ox→oxen, and many more. It checks the irregular dictionary first before applying rule-based pluralization.
Q Can it handle words borrowed from Latin or Greek?
Yes, the tool supports many Latin and Greek pluralization patterns. Words ending in -us often change to -i (cactus→cacti, focus→foci), words ending in -is change to -es (analysis→analyses, thesis→theses), and words ending in -on often change to -a (phenomenon→phenomena, criterion→criteria). Some words have both regular and classical plurals, and the tool shows the classical form.
Q What if a word is already plural?
The tool will attempt to pluralize whatever word you enter. If you enter a word that is already in plural form, it will apply the rules again, which may produce an unexpected result. The tool works best when you enter singular nouns. For words that are the same in both singular and plural (like "sheep" or "deer"), the tool will return the same word.