The correct spelling is input, not imput. Input is a noun meaning a contribution, advice, or data put into a system. It is also a verb meaning to enter information, usually into a computer. Imput is not a standard English word. It appears only as a misspelling.
The mix-up is common because people often pronounce input with an m-like sound, and because a similar word, impute, is real. Knowing which one to use keeps your emails, reports, and technical writing accurate and professional. This guide explains the meanings, verb forms, past tense options, and the most common mistakes, with clear examples.
What Does Input Mean?
Input comes from the words “in” and “put,” and its meanings still reflect that: something put into a person, process, or machine. Dictionaries such as Oxford Learner’s Dictionaries list it as both a noun and a verb. The sense depends on context, so it helps to separate the three most common uses.
Input as Contribution or Advice
In everyday and workplace English, input means opinions, ideas, or information offered to help shape a decision. In this sense it is usually uncountable, so it takes no “a” and rarely appears in the plural.
- Our manager asked for input before choosing a vendor.
- Your input made the final design much stronger.
Input as Data Entry
As a verb, input means to enter information into a computer or another device. As a noun, it names the information that is entered.
- She will input the survey results tonight.
- The form rejects any input that contains symbols.
In casual writing, “enter” or “type” often sounds more natural than “input” as a verb. Input is still fully correct.
Input as a Technical or Scientific Term
In engineering, electronics, and economics, input is often countable. It can mean a signal, a quantity, or a resource that goes into a system and produces output.
- The amplifier has two audio inputs.
- Labor and raw materials are key inputs in manufacturing.
Input Word Forms at a Glance
Input is an irregular-looking verb because its base form, present form, and one past form are identical. The table below shows each form with a short example.
| Form | Grammatical function | Example |
| input | Noun (singular or uncountable) | We welcome input from every department. |
| inputs | Plural noun | The device has three inputs. |
| input | Base verb | Please input your ZIP code. |
| inputs | Third-person singular verb | He inputs the invoices each Friday. |
| inputting | Present participle or gerund | Maria is inputting the exam grades. |
| input or inputted | Simple past and past participle | They input (or inputted) the data last night. |
| input | Adjective (before a noun) | Click the input field to begin typing. |
What Does Imput Mean?
Imput has no meaning in standard English. It is not an entry in the major English dictionaries as a separate word, and it is not an accepted variant of input. When you see “imput” in writing, it is a typo or a spelling error for “input.”
Why People Write “Imput”
Most people who write “imput” are spelling what they hear. In natural speech, the sound before the “p” in input often shifts to an “m” sound, so the word can sound like “imput.” Many writers also know words such as impossible, important, and impact, which really do start with “imp-.” That pattern makes the incorrect spelling feel familiar and plausible. Keyboard slips can also cause it, since “m” and “n” sit next to each other.
The Linguistic Explanation
The spelling confusion has a clear linguistic cause. English speakers often adjust a nasal consonant to match the sound that follows it. This process is called assimilation. Before a “p” or “b,” the tongue tip “n” tends to become a lip-closing “m.” That is why “in person” can sound like “im person” in fast speech, and why “input” can sound like “imput.”
Spelling, however, does not always follow pronunciation. Input is a native English compound built from two whole words, “in” and “put.” Compounds keep the spelling of their parts, so the “n” stays, just as it does in “inbox” or “inlet.”
Latin-derived words follow a different rule. Their prefix “in-” changed to “im-” before p, b, and m, which is why we write impossible, imbalance, and immature. Because input is not one of those Latin formations, the rule does not apply.
Imput or Impute: An Important Distinction
Impute is a genuine English verb, and it is the word most often confused with input. It comes from Latin and follows the “im-” pattern described above. It is pronounced with stress on the second syllable, “im-PYOOT,” while input stresses the first syllable.
Impute has two main senses:
- To attribute something to someone or something, often a fault or motive. Example: It is unfair to impute dishonest motives to a new employee.
- To fill in missing values with estimates in statistics and data science. Example: The analyst chose to impute the missing income figures with the median.
Because impute appears in data work, writers sometimes use it when they simply mean entering data. Those are different actions. Entering data is input. Estimating missing data is impute. Neither one is spelled “imput.”
Imput or Impute or Input Comparison Table
Use this table to see the status and meaning of each spelling side by side.
| Word | Status | Meaning | Example sentence |
| Input | Standard noun, verb, and adjective | Contribution, advice, or data put into a system; to enter data | Please input the shipping address before checkout. |
| Impute | Standard verb | To attribute to someone; to estimate missing values | The report imputes missing ages using the group average. |
| Imput | Not a standard word | No meaning; a misspelling of input | Incorrect: Thanks for your imput. Correct: Thanks for your input. |
Past Tense of Input: Input or Inputted?
Both forms are accepted. Oxford Learner’s Dictionaries lists “input” and “inputted” as acceptable past simple and past participle forms of the verb. Some writers feel that “input” is the better choice because it behaves like “put,” “set,” and “cut,” which keep the same form in the past tense. Others prefer “inputted” because the “-ed” ending makes the past tense obvious.
Neither choice is an error. Consider these guidelines:
- Pick one form and use it consistently throughout a document.
- Choose “input” if you want a shorter, more traditional irregular pattern.
- Choose “inputted” if your readers might mistake “input” for the present tense.
- Watch the spelling: the correct form is “inputted,” with a double “t.” “Inputed” is a misspelling.
Compare the two:
- The clerk input the figures before lunch.
- The clerk inputted the figures before lunch.
Both sentences are correct, and the meaning is identical.
When to Use Input Correctly
Input works well in many settings, but the best phrasing changes with your audience. These tips will help you choose it confidently.
In Professional and Workplace Communication
In business writing, input usually means feedback or ideas. Use it as an uncountable noun and pair it with verbs such as “provide,” “offer,” “seek,” or “value.”
- We would appreciate your input on the budget draft.
- The committee invited input from customers before finalizing the policy.
Avoid the plural “inputs” for advice unless you mean separate pieces of information, as in “The model combines inputs from three teams.” For general advice, the singular sounds more natural.
In Technology and Data Contexts
In computing, input refers to anything entered into a program or device, such as text, clicks, or sensor signals. The verb “input” is standard here, and the related adjective appears in terms such as input device, input field, and input error.
- Identify what the system accepts as input.
- Enter the information in the correct format.
- Check the system’s response for errors.
Precision matters in technical writing. A typo like “imput field” in a user interface or a manual can confuse users and reduce trust in the product.
Input or Imput Examples
The following pairs show the correct spelling in realistic situations. The incorrect version is labeled in each case.
- Email: Incorrect: Let me know if you have any imput. Correct: Let me know if you have any input.
- Classroom: Incorrect: The teacher wants student imput on the project topic. Correct: The teacher wants student input on the project topic.
- Spreadsheet: Incorrect: Please imput the totals in column D. Correct: Please input the totals in column D.
- Programming: Incorrect: The script reads imput from the keyboard. Correct: The script reads input from the keyboard.
- Statistics: Incorrect: We imput the missing scores. Correct: We impute the missing scores. (Here the writer means estimating values, so “impute” is the right word.)
Input or Imput Synonyms
Imput has no synonyms because it is not a word. The synonyms below belong to input. Choose them by meaning, not just by sound.
- Advice or contribution: feedback, suggestions, comments, opinions, ideas, contribution
- Entering data (verb): enter, type, key in, submit, record, feed
- Technical sense: data, signal, resource, material
Keep small differences in mind. “Feedback” usually responds to something already done, while “input” is often requested before a decision. “Enter” is usually the simplest choice when you tell someone to type information into a form.
Common Mistakes to Avoid
These errors appear often in emails, reports, and online content.
- Misspelling the word as “imput.”
Incorrect: Thank you for your imput.
Correct: Thank you for your input.
The word is a compound of “in” and “put,” so it keeps the letter “n.” - Using “impute” to mean “enter.”
Incorrect: Please impute your password.
Correct: Please input (or enter) your password.
Impute means to attribute or to estimate missing values. - Writing “inputed” with one “t.”
Incorrect: She inputed the codes.
Correct: She inputted (or input) the codes.
The final consonant doubles before “-ed.” - Treating advice as a plural by default.
Weak: Please send me your inputs on the plan.
Better: Please send me your input on the plan.
In the advice sense, input is normally uncountable. This is a style point, not a strict error. - Mixing past forms in the same text.
Inconsistent: He input the first batch and inputted the second.
Consistent: He inputted the first batch and the second.
Frequently Asked Questions
Is it input or imput?
The correct spelling is input. Imput is a misspelling and does not appear as a standard English word.
Is imput a word?
No. Imput is not recognized as a standard English word. If you meant a real word, you probably intended input or impute.
What is the past tense of input?
The past tense is either “input” or “inputted.” Both are accepted by Oxford Learner’s Dictionaries. Choose one form and use it consistently.
What is the difference between input and impute?
Input means a contribution or data put into something, or the act of entering it. Impute means to attribute something to someone, or to estimate missing values in a dataset.
Can input be used as a verb in formal writing?
Yes. Input is a standard verb, especially when you refer to entering data. In formal prose, “enter” or “provide” may sound smoother, but “input” is not incorrect.
Is input countable or uncountable?
It can be either. When it means advice or ideas, it is usually uncountable: “We value your input.” In technical contexts it is countable: “The mixer has four inputs.”
What is the opposite of input?
The usual opposite is output. Input goes into a system, and output comes out of it. Examples include “keyboard input” and “screen output.”
Conclusion
Always write input, never imput. The word is a simple compound of “in” and “put,” and its spelling stays the same even when speech makes it sound like “imput.”
Use input for advice, data entry, and technical signals. Use impute only when you mean to attribute something or to estimate missing values. For the past tense, both “input” and “inputted” are acceptable, so pick one and stay consistent.