✅ Data Are
Traditionally correct. Use it when data means several facts, figures, or observations.
✳️ Data Is
Also common today. Use it when data means information as one whole mass.
Both data are and data is can be correct, but they do not feel the same. In formal science, academic writing, and technical reports, data are is usually the safer choice because data is historically plural. In everyday English, business writing, and tech writing, data is is widely used when data means information as a single general concept.
The simplest rule: use data are for separate pieces of data, and use data is when talking about data as one body of information.
Data Is vs Data Are: The Main Difference
The word data comes from Latin, where it is the plural form of datum. That is why many teachers, editors, researchers, and scientists prefer data are.
But modern English does not always follow Latin forms in a strict way. In many real sentences, people use data like an uncountable noun, similar to information. Since we say information is, many speakers also say data is.
Use Data Are When Data Means Separate Items
Choose data are when you mean numbers, facts, measurements, responses, or results as individual pieces.
- The data are stored in three separate files.
- The survey data are not complete yet.
- These data are useful for the final report.
Use Data Is When Data Means Information
Choose data is when you mean information as one complete set, resource, or mass.
- The data is stored in the cloud.
- Customer data is important for better decisions.
- This data is hard to read without a chart.
Which One Should You Use?
For most careful writing, data are is the safer option. It sounds more formal and more precise. If you are writing for a university, a research paper, a scientific report, or a strict editor, data are will usually fit better.
For general web content, product writing, business reports, and casual professional English, data is can sound natural. Many readers will not see it as wrong because they understand data as information, not as a set of separate datums.
| Situation | Better Choice | Why It Works |
|---|---|---|
| Academic Writing | Data Are | It treats data as a plural noun and sounds more formal. |
| Scientific Reports | Data Are | Researchers often refer to separate observations, values, or results. |
| Business Writing | Data Is or Data Are | Both can work, depending on whether the writer means information as one whole or many data points. |
| Everyday English | Data Is | Many people use data like the uncountable word information. |
| Strict Grammar Tests | Data Are | Traditional grammar treats data as plural. |
Why Data Are Is Traditionally Correct
In traditional grammar, data is plural. The singular form is datum. So, if you follow the older rule strictly, the verb should also be plural:
This style works well when the sentence focuses on several results. Think of test scores, survey answers, spreadsheet rows, temperature readings, or research observations. They are separate pieces. So data are makes sense.
Why Data Is Is Common in Modern English
In modern English, many people use data as a mass noun. A mass noun refers to something we see as one general substance or idea. For example, we say the information is useful, not the information are useful.
That same idea explains sentences like these:
✅ The data is useful for marketing.
✅ Our data is stored securely.
✅ This data is too old to use.
Here, the writer is not thinking about separate data points. The writer means information as one whole. That is why data is sounds natural in many business and technology contexts.
Is Data Is Wrong?
Data is is not automatically wrong. It depends on the style guide, audience, and meaning. A strict professor may prefer data are. A software team may write data is every day and sound completely normal.
The real question is not only “Which form is correct?” A better question is: How will my reader understand this sentence?
If your reader expects formal grammar, use data are. If your reader expects natural modern English, data is may be fine.
Is Data Are Too Formal?
Data are can sound formal, but it is not strange. It is especially normal in research, statistics, analytics, medicine, education, and science. In these fields, writers often treat data as a collection of measured items.
In casual speech, though, data are may sound a little stiff to some readers. For example, a sentence like my phone data are almost gone sounds awkward. Most people would say my phone data is almost gone because they mean mobile data as one service or amount.
How To Choose the Right Verb
Look at the meaning first. If data means one body of information, use a singular verb. If it means multiple results or values, use a plural verb.
| Meaning | Verb | Example |
|---|---|---|
| Data As Separate Facts | Are | The data are grouped by age and location. |
| Data As One Information Set | Is | The data is stored in one database. |
| Formal Research Tone | Are | The data are consistent with the earlier results. |
| Everyday Tech Tone | Is | The data is loading slowly. |
Common Examples With Data Are
Use data are when the sentence points to many pieces, findings, or measurements.
- ✅ The data are divided into three groups.
- ✅ These data are reliable enough for the report.
- ✅ The data are taken from different surveys.
- ✅ The data were reviewed by the research team.
- ✅ The data show a steady increase.
Notice the plural verbs: are, were, and show. They match data as a plural noun.
Common Examples With Data Is
Use data is when the sentence treats data as one general thing, often similar to information.
- ✅ The data is saved automatically.
- ✅ This data is useful for planning.
- ✅ Personal data is protected by the system.
- ✅ The data was moved to a new server.
- ✅ Data helps teams make better decisions.
Notice the singular verbs: is, was, and helps. This style treats data as a single concept.
Data Shows or Data Show?
The same rule applies to data shows and data show. If data means one body of information, use shows. If data means several findings, use show.
✅ The data show that sales increased in June. This sounds formal and plural.
✅ The data shows a clear trend. This sounds modern and singular.
For formal writing, the data show is usually the safer version. For everyday business writing, the data shows is common.
This Data or These Data?
Both this data and these data can be correct, but they create different tones.
| Phrase | Best Use | Example |
|---|---|---|
| This Data | Modern, common, natural in business and tech writing | This data is useful for the dashboard. |
| These Data | Formal, academic, scientific, or statistical writing | These data are consistent with the first test. |
If you want the safest formal choice, write these data are. If you want a more natural everyday sentence, write this data is.
What About the Word Datum?
Datum is the singular form of data, but it is not common in everyday English. Most people do not say one datum in normal conversation. They usually say one data point, one piece of data, or one value.
✅ One data point is missing.
✅ One piece of data is incorrect.
✅ One value is outside the normal range.
For most readers, data point sounds clearer than datum. Use datum only when your audience expects technical or academic language.
Simple Rule for Everyday Writing
When you are not sure, choose based on the type of writing:
- Use data are in formal, academic, scientific, or strict grammar contexts.
- Use data is in everyday, business, marketing, software, or general web writing.
- Stay consistent. Do not switch between data is and data are in the same paragraph unless the meaning truly changes.
Best Safe Choice
If you need one answer for a grammar test, formal article, or careful report, choose data are. If you are writing in a natural modern style, data is can also be acceptable.
More Correct Sentence Examples
Formal Examples
- ✅ The data are clear.
- ✅ These data are from a controlled study.
- ✅ The data were analyzed before publication.
- ✅ The data suggest a possible connection.
Modern Everyday Examples
- ✅ The data is clear.
- ✅ This data is from our app.
- ✅ The data was uploaded yesterday.
- ✅ The data helps us understand user behavior.
Common Mistakes To Avoid
The biggest mistake is mixing the form without a reason. A sentence can become awkward when the writer starts with this data but then uses a plural verb, or starts with these data but then uses a singular verb.
❌ This data are useful.
✅ This data is useful.
❌ These data is useful.
✅ These data are useful.
Keep the sentence matched. This data is. These data are. Simple, clean, and easy to read.
Data Is vs Data Are in One Look
| Expression | Correct? | Tone | Example |
|---|---|---|---|
| Data Are | ✅ Yes | Formal, traditional, academic | The data are reliable. |
| Data Is | ✅ Yes | Modern, common, businesslike | The data is reliable. |
| These Data Are | ✅ Yes | Very formal | These data are useful. |
| This Data Is | ✅ Yes | Natural and common | This data is useful. |
| These Data Is | ❌ No | Incorrect agreement | These data is useful. |
Frequently Asked Questions
Is Data Are Grammatically Correct?
Yes. Data are is grammatically correct in traditional English because data is historically plural. It is a strong choice for formal, academic, scientific, and technical writing.
Is Data Is Acceptable?
Yes. Data is is acceptable in many modern contexts when data means information as one whole. It is common in business, technology, analytics, and everyday English.
Should I Write The Data Are or The Data Is?
Write the data are if you want a formal or traditional style. Write the data is if you mean one body of information and want a natural modern tone.
Is Data Singular or Plural?
Data is traditionally plural, but modern English often treats it as singular or uncountable. That is why both data are and data is appear in correct English, depending on context.
What Is the Singular of Data?
The singular form is datum, but it is not common in everyday writing. In most cases, one data point or one piece of data sounds clearer.
Which Form Is Better for Professional Writing?
For careful professional writing, data are is usually the safer option. For a modern business or tech tone, data is can sound more natural.
