Then vs Than: What’s the Difference?

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Then vs than is one of the most common writing slips in English. The two words differ by just one letter, and in casual speech they can sound nearly the same, so the wrong one slips in easily. Spell checkers rarely catch it because both are real words. This guide explains what each word means, shows how to use it, and gives you quick tricks to get it right every time.

What does then mean?

Then is mainly an adverb that points to a moment in time, the next step in a sequence, or a result. If the sentence is about when something happens or what follows, you need then.

It has three common uses. For a past or future time: “I was living in Paris then.” For a sequence: “Mix the flour, then add the eggs.” For a result or consequence: “If it rains, then we will stay inside.”

It can also work as a noun (“until then”) and, less often, as an adjective, as in “the then president,” meaning the person who held the office at that time.

What does than mean?

Than is used to compare two things. It connects the two sides of a comparison, and it almost always follows a comparative word like more, less, better, worse or any word ending in -er.

Examples: “Cats are quieter than dogs.” “I would rather read than watch TV.” “He earns more than I do.” It also appears in set phrases like “other than,” “rather than” and “no sooner than.”

Then vs than: which one should you use?

Use then for time, order or consequence, and than for comparison. A quick swap test settles most cases.

If you can replace the word with “next,” “at that time” or “in that case,” you need then. If the sentence compares two things, usually with a word like more, less, better, worse or taller before it, you need than.

Why do people confuse then and than?

People confuse them because the words look almost identical and sound alike in fast, casual speech. In careful speech, then has a short E and than has a short A, but when than is unstressed, it blurs into a soft sound close to then.

The two words also share a history. They come from the same Old English source and were once used interchangeably, before the spellings and meanings split apart over time. Today the difference is firm, and mixing them up is treated as an error.

Is it “rather than” or “rather then”?

It is rather than. This phrase compares two options, so it needs than. The same goes for other than, more than and less than. Whenever you are setting one thing against another, choose than.

Is it “if…then” or “if…than”?

It is if…then. In this pattern, then means “in that case,” so it shows the result of the condition: “If you finish early, then you can go home.” Than never works here because nothing is being compared.

How can you remember which one to use?

A quick trick for each spelling is the fastest fix. These three work well.

• Then rhymes with when. Both words are about time, so if the sentence is about timing or sequence, use then.
• Than has an A like compare. The A in than matches the A in compare, so use than for comparisons.
• The swap test. If “next” or “at that time” fits, use then. If you are weighing one thing against another, use than.

What are the most common then vs than mistakes?

Most errors happen when a writer types by sound and skips the meaning check. Here are five you will see often.

• ✗ She is taller then her sister.
  ✓ She is taller than her sister.
• ✗ We ate dinner, than we watched a movie.
  ✓ We ate dinner, then we watched a movie.
• ✗ I would rather stay home then go out.
  ✓ I would rather stay home than go out.
• ✗ If you study, than you will pass.
  ✓ If you study, then you will pass.
• ✗ It costs more then I expected.
  ✓ It costs more than I expected.

Frequently asked questions

Is it “more than” or “more then”?

It is more than. More introduces a comparison, and than is the word that completes it.

Is it “if…then” or “if…than”?

It is if…then. In this pattern, then means in that case and shows the result of the condition.

Is it “rather than” or “rather then”?

It is rather than. The phrase compares two options, so it needs than.

Can then be an adjective?

Yes, but it is uncommon. Then can describe a person or thing at a past time, as in the then president, meaning the person who was president at that time.

Do then and than sound the same?

Not exactly. Then has a short E sound and than has a short A sound, but in fast casual speech they can sound very similar. That is one reason people mix them up.

Conclusion

Then vs than comes down to one question: are you talking about time or about a comparison? Use then for time, order and consequence, and than for comparisons. Keep the “then rhymes with when” and “than has an A like compare” tricks handy and you will not mix them up again. Share this with someone who still writes “better then.”