The plural of foot is feet. Use feet when referring to more than one body part, poetic unit, or measured length, as in “My feet hurt” and “The room is 12 feet long.” Use singular foot before a noun as a compound modifier, as in “a 12-foot room.”
Key Facts at a Glance
- Feet is the standard plural noun form of foot.
- Foots is not the standard plural of the noun foot.
- Write 5 feet tall when the measurement follows the noun or verb.
- Write a 5-foot-tall tree when the measurement modifies a noun.
- One foot equals 12 inches, 0.3048 meters, and 30.48 centimeters.
- The standard abbreviations are ft., ft, or the prime symbol ′.
What Is the Plural of Foot?
The plural of foot is feet, an irregular plural that changes the internal vowel rather than adding -s. The word feet applies to physical body parts, units of distance, poetic meter, and some specialized expressions. A sentence such as “The table is four feet long” is grammatically standard.
English has several inherited irregular plurals, including tooth/teeth, goose/geese, mouse/mice, and man/men. These forms preserve older Germanic patterns. Modern speakers learn feet as a fixed plural rather than forming it through a productive rule.
| Singular form | Standard plural | Example |
|---|---|---|
| foot, body part | feet | Both feet are cold. |
| foot, length unit | feet | The fence is 8 feet high. |
| foot, poetic meter | feet | The line contains five feet. |
| foot, verb | foots, footed, footing | She foots the bill. |
The noun foot has two common meanings: a lower limb and a unit of length. Both meanings use feet in ordinary plural contexts. The verb to foot follows a different conjugation pattern, so foots can be correct when it means “pays” or “adds up.”
Why Does Foot Become Feet?
Foot becomes feet because English inherited an old vowel-change plural from Germanic languages. Earlier forms used a vowel alternation associated with plural formation, and the modern pair foot/feet retained that pattern after other endings disappeared. Present-day English treats feet as an irregular lexical form.
The historical process is useful background, but writers do not need to reproduce it. Modern grammar offers one practical rule: use foot for one and feet for more than one, except when singular foot appears inside a compound adjective.
The historical root is commonly traced through Old English forms related to fōt and fēt, with Proto-Germanic ancestry often reconstructed as fōts. Exact historical spellings and sound descriptions vary across periods, because English pronunciation changed substantially between Old English and modern English.
| Word pair | Plural mechanism | Modern example |
|---|---|---|
| foot, feet | Internal vowel change | Three feet of cable |
| tooth, teeth | Internal vowel change | Brush your teeth |
| goose, geese | Internal vowel change | Two geese crossed the path |
| mouse, mice | Internal vowel change | Several mice nested nearby |
| book, books | Added -s | Four books on the desk |
The pattern is not fully predictable. English contains many irregular nouns, but speakers recognize their plurals through usage and exposure. Applying the regular ending to foot produces foots, which is normally wrong when the intended meaning is multiple physical feet or multiple length units.
When Should You Use Feet for Body Parts?
Use feet when foot refers to more than one human or animal lower limb. The plural controls the rest of the sentence: “My feet are sore,” “The dog lifted its feet,” and “Both feet were examined” all use plural agreement or a plural noun phrase.
Use foot for one appendage: “Her left foot is injured.” The possessive determiner does not change the number, so “his feet,” “one foot,” and “both feet” follow the noun’s quantity.
| Quantity | Correct phrase | Incorrect or different meaning |
|---|---|---|
| One | one foot | one feet |
| Two | both feet | both foot |
| More than two | four feet | four foot, in formal standard English |
| One belonging to someone | my foot | my feet changes the quantity |
| More than one belonging to someone | my feet | my foot changes the quantity |
Animal anatomy follows the same ordinary pattern. “The horse has four feet” is grammatically correct, although technical writing may use more specific terms such as hooves for horses or paws for dogs.
A body-related expression can have a figurative meaning without changing its plural. “Put your best foot forward” uses singular foot because the expression describes one foot metaphorically. “They got cold feet” uses plural feet because the established idiom has that form.
Is It 5 Foot or 5 Feet?
Use 5 feet when the measurement functions as a noun or subject complement, as in “The child is 5 feet tall” or “The board measures 5 feet.” Use 5-foot before another noun, because the measurement becomes a singular compound modifier: “a 5-foot board.”
The number does not determine the form by itself. Grammatical position determines the form. This distinction explains why both “The wall is 10 feet high” and “a 10-foot wall” are correct.
| Sentence position | Correct form | Example |
|---|---|---|
| After a linking verb | Number + feet | The ceiling is 9 feet high. |
| After a measurement verb | Number + feet | The pole measures 12 feet. |
| Before a noun | Number + foot | They installed a 12-foot pole. |
| Before a noun with height | Number + foot + tall | A 6-foot-tall athlete entered. |
| Approximate idiom | Singular foot may occur | He is six foot two. |
The expression “six foot two” is common in informal speech, especially in some varieties of British English and American English. Formal edited prose usually prefers “six feet two inches tall” or “6 feet 2 inches tall.”
Why Is It a 6-Foot Wall?
“A 6-foot wall” is correct because 6-foot is a compound adjective modifying wall. Compound measurement modifiers conventionally use the singular unit and usually take a hyphen.
The same rule applies to inch, yard, mile, meter, and centimeter: “a 10-inch screen,” “a 3-yard gain,” “a 2-mile trail,” and “a 4-meter cable.” The singular unit does not mean the object measures only one unit.
| Correct modifier | Incorrect modifier | Correct expanded sentence |
|---|---|---|
| a 6-foot wall | a 6-feet wall | The wall is 6 feet high. |
| a 12-inch ruler | a 12-inches ruler | The ruler is 12 inches long. |
| a 3-mile route | a 3-miles route | The route is 3 miles long. |
| a 2-meter cable | a 2-meters cable | The cable measures 2 meters. |
Hyphenation improves parsing. In “a 6-foot wall,” the reader sees one compound description. In “a wall 6 feet high,” the measurement appears after the noun and functions as a complement, so feet is required.
How Do You Write Foot and Feet Measurements?
Write the full unit in ordinary prose when precision and readability matter, and use ft, ft., or ′ in technical specifications, drawings, tables, and dimensions. The International System of Units does not govern the foot, because the foot is a non-SI unit, but international standards define its exact modern length as 0.3048 meters.
The abbreviation generally does not change between singular and plural. Write “1 ft” and “10 ft,” not “10 fts.” The prime symbol is also unchanged: “6′” can represent six feet when the document establishes that convention.
| Representation | Singular example | Plural example | Best use |
|---|---|---|---|
| Spelled out | 1 foot | 10 feet | General prose |
| Abbreviation with period | 1 ft. | 10 ft. | House styles using periods |
| Abbreviation without period | 1 ft | 10 ft | Technical and scientific writing |
| Prime symbol | 1′ | 10′ | Drawings and dimensions |
| Feet and inches | 1 foot 8 inches | 6 feet 2 inches | Height descriptions |
Style varies by publication. The Chicago Manual of Style and many technical style guides permit house-specific abbreviation practices, while engineering and construction documents often favor symbols for compactness. Follow the governing style sheet consistently.
Do not confuse the foot symbol with an apostrophe in contexts where typography matters. The prime symbol ′ is typographically correct for measurement, while ‘ is a straight apostrophe often substituted in plain text.
What Are the Standard Foot Conversions?
One foot equals 12 inches, 30.48 centimeters, or 0.3048 meters. Three feet equal one yard, while one square foot and one cubic foot measure area and volume rather than length.
The conversion factor is exact for the modern international foot. The United States customary system uses the same exact relationship for ordinary measurements, although historical survey feet require separate treatment in specialized geospatial work.
| Measurement | Exact conversion | Common example |
|---|---|---|
| 1 foot | 12 inches | A standard ruler length |
| 1 foot | 30.48 centimeters | Metric conversion |
| 1 foot | 0.3048 meters | Engineering calculation |
| 3 feet | 1 yard | Fabric or distance |
| 5 feet | 60 inches | A person’s approximate height |
| 10 feet | 3.048 meters | Ceiling height |
What Is the Difference Between Feet, Square Feet, and Cubic Feet?
Feet measure length, square feet measure area, and cubic feet measure volume. A 10-foot board has a linear dimension, a 10-square-foot floor covers an area, and a 10-cubic-foot container holds a volume.
The unit changes mathematically with the dimension. Converting 1 square foot to square meters requires squaring the linear conversion, and converting 1 cubic foot requires cubing it.
| Unit | Measures | Exact metric equivalent |
|---|---|---|
| foot, ft | Length | 0.3048 m |
| square foot, ft² | Area | 0.09290304 m² |
| cubic foot, ft³ | Volume | 0.028316846592 m³ |
| foot-pound, ft·lb | Torque or energy context | Context-dependent |
A frequent writing error is to call an area “feet.” Say “The room is 12 feet wide” for one dimension, but “The room has 120 square feet” for its floor area. Construction documents should identify whether a figure describes length, area, volume, or another derived quantity.
What Does Foot Mean in Poetry?
In poetry, a foot is a recurring metrical unit made from stressed and unstressed syllables, and its plural is feet. An iamb typically contains an unstressed syllable followed by a stressed syllable, while a trochee reverses that order.
Poetic feet are not physical measurements. The shared word comes from the idea of a rhythmic measure or patterned step. “Iambic pentameter” traditionally describes a line containing five iambic feet, although actual poetic lines can include substitutions and variations.
| Poetic foot | Syllable pattern | Common example |
|---|---|---|
| Iamb | unstressed, stressed | re-LAX |
| Trochee | stressed, unstressed | GAR-den |
| Anapest | unstressed, unstressed, stressed | inter-VENE |
| Dactyl | stressed, unstressed, unstressed | MER-ri-ly |
| Spondee | stressed, stressed | HEART-BREAK |
The plural remains feet regardless of the metrical type: “The poem uses four feet per line.” Technical literary analysis may describe substitutions, caesuras, or catalexis, but those terms do not alter the plural noun.
Is Foots Ever Correct?
Foots is correct as the third-person singular present form of the verb to foot, but it is not the standard plural of the noun foot. “She foots the bill” means she pays the bill, while “The hikers’ feet were wet” uses the correct plural noun.
The verb foot has several specialized meanings. A person may foot an invoice, foot a ladder, or foot a column in a document. In each case, foots can be grammatically correct when the subject is singular and uses present-tense agreement.
| Form | Part of speech | Example |
|---|---|---|
| foot | noun, singular | One foot is swollen. |
| feet | noun, plural | Both feet are swollen. |
| foot | verb, base form | They foot the bill. |
| foots | verb, third-person singular | The company foots the bill. |
| footed | verb, past tense | The sponsor footed the bill. |
| footing | verb, participle | She is footing the cost. |
Rare specialist vocabulary can produce forms that resemble foots. Historical texts, dialects, and technical compounds may contain unusual usages, but those exceptions do not change the standard answer for ordinary English.
How Do Foot and Feet Compare in Common Sentences?
The choice between foot and feet depends on number and grammatical position, not on whether the measurement sounds formal or informal. A single unit appears as foot in ordinary noun use, a plural quantity appears as feet, and a pre-noun compound uses singular foot.
| Intended meaning | Correct sentence | Rule |
|---|---|---|
| One body part | My right foot hurts. | Singular noun |
| Multiple body parts | My feet hurt. | Irregular plural |
| Multiple length units | The shelf is 4 feet long. | Plural after measurement |
| Compound modifier | She bought a 4-foot shelf. | Singular hyphenated modifier |
| Poetic units | The stanza has eight feet. | Plural metrical noun |
| Verb meaning pays | He foots the bill. | Verb, not plural noun |
A useful editing test is to expand the sentence. If the phrase answers “How long is it?” use feet: “The shelf is 4 feet long.” If the phrase directly describes a noun before it, use singular foot: “a 4-foot shelf.”
Which Form Works in Technical Writing?
Technical writing benefits from symbols and explicit dimensions, while general prose benefits from spelled-out units. A construction schedule might say “Install 8 ft fence panels,” whereas a consumer-facing instruction might say “Install 8-foot fence panels.”
Technical writers should define notation when a document combines feet and inches. A specification such as 6′-4″ is compact, but plain-language text should use “6 feet 4 inches” when the audience may not know the symbols.
| Document type | Preferred example | Reason |
|---|---|---|
| General prose | 8 feet long | Easy to read |
| Product description | 8-foot table | Compound modifier |
| Architectural drawing | 8′-0″ | Compact dimension |
| Engineering schedule | 8 ft | Consistent tabular notation |
| Legal or safety instruction | 8 feet | Reduced ambiguity |
The prime and double-prime symbols can be misread in poorly encoded documents. Use spelled-out units when accessibility, screen readers, or legal interpretation matters more than compact layout.
Common Mistakes With Foot and Feet
The most frequent mistakes involve pluralizing foot mechanically, pluralizing a compound modifier, or confusing linear units with area and volume. Correcting the grammatical position usually fixes the sentence immediately.
- Writing “foots” for multiple feet
Incorrect: “My foots are cold.”
Correct: “My feet are cold.”
Foots is normally a verb form, not the noun plural. - Writing “6-feet wall”
Incorrect: “They built a 6-feet wall.”
Correct: “They built a 6-foot wall.”
The compound modifier uses singular foot. - Writing “The wall is 6 foot high” in formal prose
Preferred: “The wall is 6 feet high.”
Informal speech may omit the plural ending, but edited writing generally does not. - Writing “10 feet square” when area is intended
“Ten feet square” can mean a square measuring ten feet on each side, which has 100 square feet of area. Say “100 square feet” when reporting area directly. - Writing “fts” as the abbreviation
Use “ft,” “ft.,” or “′.” Standard technical notation does not add an s to the abbreviation. - Using feet for a single object
“The cable is 1 feet long” is incorrect. Write “The cable is 1 foot long.”
An expert editing rule is to check the unit’s syntactic role before checking the number. The same quantity can correctly appear as “a 12-foot beam,” “a beam 12 feet long,” or “12 ft beam” under a technical style convention.
How Can You Remember the Plural of Foot?
Remember foot/feet with the irregular pairs tooth/teeth and goose/geese. Each pair changes an internal vowel rather than adding -s, so “feet” belongs to a recognizable group of inherited English plurals.
Use a three-part memory check:
- One body part: one foot
- More than one: two feet
- Before a noun: a two-foot ruler
The sentence position provides a second check. “The ruler is two feet long” uses the plural because the measurement follows the verb. “A two-foot ruler” uses singular foot because the measurement modifies ruler.
Learners should avoid relying only on pronunciation. In fast speech, “foot” and “feet” can be difficult to distinguish for language learners, while written examples make the number and grammatical position visible.
Frequently Asked Questions
Is the plural of foot always feet?
The standard plural noun is always feet in ordinary modern English. The form foots can appear as a present-tense verb, as in “She foots the bill,” but it does not normally mean multiple body parts or multiple length units.
Do you say 12 foot or 12 feet?
Say 12 feet when the measurement follows a verb or appears as a noun phrase: “The rope is 12 feet long.” Say 12-foot before a noun: “a 12-foot rope.” Informal speech may use “12 foot,” but formal writing generally uses 12 feet in the first construction.
Is it 5 feet tall or 5 foot tall?
Five feet tall is the standard form in formal writing. “Five foot tall” occurs in casual speech and some regional varieties, but edited prose should use the plural unit after the measurement and verb.
What is the plural of foot in British English?
British English also uses feet as the standard plural of the noun foot. Regional differences may affect pronunciation, abbreviation style, or informal height expressions, but “The room is 10 feet long” and “both feet” are standard in British and American English.
Should you write 6 ft or 6 feet?
Use 6 ft in technical tables, drawings, specifications, and compact measurements; use 6 feet in general prose. The abbreviation remains ft for both one foot and multiple feet, so “6 fts” is not standard.
Is a foot the same as 12 inches?
Yes. One international foot equals exactly 12 inches, 30.48 centimeters, and 0.3048 meters. The conversion applies to linear length. Area and volume require squared or cubed conversions, so one square foot is not equal to 12 square inches.
The Bottom Line
The plural of foot is feet. Write “two feet,” “six feet tall,” and “both feet,” but write “a six-foot wall” when the measurement comes before a noun as a compound modifier. Use foots only as a verb, and use ft, ft., or ′ as the unchanged abbreviation for both singular and plural measurements.
