When to Use then or than in English

If you have ever paused while writing a sentence, unsure whether to type then or than, you are not alone. These two words sound almost identical but serve completely different purposes. Then relates to time or sequence, while than is used for comparisons. The simplest way to decide is to ask yourself: Am I talking about time or order? If yes, use then. Am I comparing two things? If yes, use than. This guide will help you master the difference with clear rules, real examples, and common mistake notes.

Quick Answer: then vs. than

Then = time, sequence, or consequence. Example: “First I finish work, then I go home.”
Than = comparison. Example: “She is taller than her brother.”

If you can replace the word with “next” or “after that,” use then. If you can replace it with “compared to,” use than.

When to Use then

Then is an adverb that connects events in time or shows a logical result. You will hear it often in everyday conversation, instructions, and storytelling.

1. Sequence of Events

Use then to show what happens next.

• We ate dinner, and then we watched a movie.
• Finish your homework first; then you can play outside.

2. Logical Consequence

Use then to mean “in that case” or “as a result.”

• If you are tired, then you should rest.
• If the price is too high, then we will look elsewhere.

3. Informal and Formal Tone

Then works in both casual and formal writing. In emails, it is common to say “We will review your application, and then we will contact you.” In conversation, you might say “I grabbed my keys, and then I left.”

When to Use than

Than is a conjunction or preposition used to introduce the second part of a comparison.

1. Comparing Adjectives or Adverbs

• This coffee is hotter than that one.
• He runs faster than his teammate.

2. Comparing Quantities

• She has more experience than I do.
• We spent less money than we planned.

3. Common Phrases with than

• Rather than wait, we decided to leave early.
• No sooner had I arrived than the meeting started.

4. Formal and Informal Use

Than is used in all contexts. In formal writing, you might see “The results were better than expected.” In casual conversation, “She is nicer than I thought” is perfectly natural.

Comparison Table: then vs. than

Natural Examples

Here are sentences you might hear or write in real life.

• I will call you then we can decide.
• This book is more interesting than the last one.
• First, add the eggs, and then stir the mixture.
• She earns less than her colleague.
• If you finish early, then you can help me.
• I would rather walk than take the bus.

Common Mistakes

Even native speakers mix these up. Here are the most frequent errors and how to fix them.

Mistake 1: Using than for time

Incorrect: “I will finish my work, than I will go home.”
Correct: “I will finish my work, then I will go home.”
Reason: The sentence shows a sequence of events, not a comparison.

Mistake 2: Using then for comparison

Incorrect: “She is taller then her sister.”
Correct: “She is taller than her sister.”
Reason: The sentence compares height, so than is required.

Mistake 3: Confusing phrases

Incorrect: “Rather then wait, we left.”
Correct: “Rather than wait, we left.”
Reason: “Rather than” is a fixed phrase used for preference or comparison.

Better Alternatives and When to Use Them

Sometimes you can rephrase a sentence to avoid the confusion altogether. Here are some alternatives.

• Instead of “First do this, then do that,” you can say “After doing this, do that.”
• Instead of “She is smarter than him,” you can say “She is smarter compared to him.”
• In formal writing, “subsequently” can replace then, but it sounds stiff in conversation.
• For comparisons, “in contrast to” works but is more formal.

When to use it: Stick with then and than in everyday speech and most emails. Use alternatives only if you want a more formal tone or if you are unsure about the correct word.

Mini Practice: 4 Questions

Test yourself. Choose then or than for each sentence.

1. I would rather stay home ___ go out tonight.
2. We will finish the report, and ___ we will send it.
3. This task is harder ___ I expected.
4. If you are ready, ___ we can start the meeting.

Answers:

1. than (comparison of preference)
2. then (sequence of events)
3. than (comparison of difficulty)
4. then (logical result)

FAQ: then vs. than

1. Can then ever be used as a comparison word?

No. Then never indicates comparison. If you are comparing two things, always use than.

2. Is it “different than” or “different from”?

Both are used, but “different from” is more common in formal writing. “Different than” is accepted in American English, especially in casual speech. Example: “This is different than what I expected.”

3. What about “more than” or “less than”?

These always use than because they compare quantities. Example: “I have more than enough time.”

4. How can I remember the difference quickly?

Think of the letter “e” in then for “event” or “time.” Think of the letter “a” in than for “amount” or “comparison.” This simple trick helps many learners.

Final Tips for Real Writing and Conversation

In emails, double-check your use of then and than before sending. A small mistake can change your meaning. For example, “I will call you than I arrive” is confusing because it sounds like a comparison. The correct version is “I will call you then I arrive” (meaning after I arrive).

In conversation, the difference is less noticeable because the words sound similar, but using the correct word shows careful English. If you are unsure, pause and ask yourself: time or comparison? That one question will guide you.

For more help with similar word pairs, visit our Usage Confusions category. You can also read our Editorial Policy to understand how we create these guides.