Past Tense of “smell”
The past tense of smell is smelled; the past participle is smelled.
Why “smell” behaves this way
"Smell" is a genuinely puzzling word etymologically: unlike most English verbs, its origin before Middle English is unknown, and it has no confirmed cognates in other Germanic languages, which is unusual for such a basic, everyday verb. It appears suddenly in Middle English texts around the twelfth century with a form close to "smellen," already behaving as a weak (regular-pattern) verb, and both "smelled" and the British variant "smelt" have been in continuous use since roughly that period, rather than one being a later innovation on the other.
"Smelled" and "smelt" form one of English's clearest present-day dialect splits: American English strongly prefers "smelled" in virtually all registers, while British and Australian English use both, often with "smelt" slightly favored in speech and "smelled" more common in formal writing. This same t/-ed split runs through a whole family of verbs — burn/burnt, spill/spilt, dream/dreamt, spoil/spoilt, learn/learnt — none of which are wrong in either form, but each of which carries a noticeable regional flavor to readers. Historical dictionaries show both forms appearing in print by at least the sixteenth century, meaning this isn't a case of one form being older or more "authentic" than the other; both have simply persisted on opposite sides of the Atlantic for different sociolinguistic reasons tied to how each dialect treated the wider t-preterite family after the seventeenth century.
The common confusion
The confusion here isn't about correctness so much as consistency: writers who mix "smelled" in one paragraph and "smelt" in another, often unconsciously, create a jarring inconsistency of register that copyeditors flag even though neither individual form is wrong. A second point of confusion is with the noun "smelt," a small oily fish, which is spelled identically to the British past-tense verb form but is etymologically unrelated, and a third, entirely separate homograph is the metallurgical verb "smelt" (to extract metal from ore by heating), which is a completely regular, unrelated verb in its own right — "they smelted the iron ore" — coincidentally identical in spelling to the British past tense of "smell" but with no historical connection whatsoever.
How it's actually used
"Smell" functions as both a linking verb describing a quality ("the soup smells great") and an ordinary transitive or intransitive action verb describing the act of perceiving an odor ("she smelled the flowers"), and this dual grammatical role is part of why native speakers rarely misuse it despite its irregular-looking British variant — the two functions are distinguished by context rather than by different conjugations. As a linking verb it behaves like "taste," "look," and "feel," taking an adjective rather than an adverb after it ("it smells bad," never "it smells badly," unless you're specifically describing a malfunctioning nose), a distinction that trips up even confident writers who over-apply the general adverb rule.
Across the tense system
In the perfect tense, both regional forms behave identically: "she has smelled/smelt gas before and recognized it immediately." Style guides for international publications generally lock in one variant for an entire piece regardless of a particular writer's native dialect, precisely because the alternation, while grammatically harmless, reads as inconsistent when both forms appear in the same document.
Common real mistakes
The main practical error is inconsistency rather than incorrectness — switching between "smelled" and "smelt" within the same piece of writing without any dialectal reason to do so. A second, much less common error is "smellt," an incorrect blend that neither American nor British spelling conventions recognize, sometimes produced by writers trying to guess at the British spelling without having actually seen it in print. A third error, common in translated or non-native English, is treating "smelt" as if it must always be more formal or more correct than "smelled" simply because it looks less regular, when in fact American style guides consistently prefer "smelled" for formal writing and treat "smelt" as the marked, dialectal choice rather than the elevated one.
Examples
- The bread smelled wonderful as it baked.
- She had smelled smoke before she saw the fire.
- He smelt something burning in the kitchen.
- They smelled trouble the moment they walked in.
- The dog had smelled the treat hidden in the drawer.
- It smelled like rain outside.
Memory trick
Remember the geography, not the grammar: "smelled" is the safe, universally correct choice everywhere, while "smelt" is the distinctly British option — the same split as burnt/burned and spelt/spelled. If in doubt or writing for an American audience, "smelled" is never wrong.