Distinguishing Between Data and Datum: A Simplified Guide

Understanding Data vs. Datum

When we talk about “data” and “datum,” we are using words from the past. Both come from Latin. Let’s learn what they mean and how to use them.

History

The word “datum” is Latin. It means “something given.” In English, it means a single piece of information. “Data” is the plural of “datum” in Latin. But in English today, “data” can mean many pieces of information. Sometimes, people say “data” is like “information” and use it as a singular noun.

How to Use Them

Using “Datum”

“Datum” is used for one piece of information. It is less common today, but still correct.

• This datum shows the temperature at noon.
• He recorded an important datum for the experiment.
• Each datum in the report matters.
• The scientist added a new datum to the chart.
• One missing datum can change the outcome.

Using “Data”

“Data” is used for multiple pieces of information. Today, it’s often used like a singular noun, meaning all information together.

• The data is saved in the computer.
• These data help us understand the problem.
• All data need to be checked again.
• The data was collected over many weeks.
• Our data show the test results.

Trick to Remember the Difference

Remember, “datum” is one piece. If you have more, use “data.” It’s like a single “apple” (datum) and a group of “apples” (data).

Summary

“Datum” is for one small piece. “Data” is for many pieces. Today, we often say “data” like it is one group of many pieces of information. When you have only one piece, say “datum.” When you have many, say “data.”