To Fast or Too Fast: What’s the Difference?

To Fast or Too Fast Quiz: Test Yourself

Five quick questions on to fast or too fast. Pick an answer to get instant feedback.

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Writers often pause over to fast or too fast because the two sound identical when spoken. On the page, though, they mean very different things. This guide explains the difference between to fast and too fast, shows when each is correct, and gives you quick tricks to choose the right one every time.

What does “too fast” mean?

Too fast means faster than is safe, comfortable or wanted. Here, too is an adverb meaning “excessively,” and it modifies fast. You will see it whenever speed becomes a problem: a car, a song, a speaker, a deadline.

• The train was going too fast to read the station signs.
• The teacher spoke too fast for the class to take notes.
• Don’t scroll too fast or you’ll miss the details.

People also search for “too fast vs to fast” because “too” has a second meaning, “also,” as in “I want fast Wi-Fi too.” Both uses keep the double o.

What does “to fast” mean?

To fast is the infinitive of the verb fast, meaning to go without food, and sometimes drink, for a set period. In this case “to” is just the marker that comes before a verb, as in “to run” or “to eat.”

People fast for religious, cultural or health reasons. Notice that the sentence always carries an action, not a speed:

• Many people choose to fast during Ramadan.
• She plans to fast for one day each week.
• Some patients are asked to fast before a blood test.

Is “to fast” a real phrase, or always a typo?

“To fast” is a real phrase, but only in two situations. The first is the verb use above. The second is when “to” is a preposition and fast describes the noun that follows, as in “We listened to fast music.”

In every other case, “to fast” is a spelling slip. If you mean “excessively fast,” write too fast. This is the mistake most people are searching for when they ask about the difference between to fast and too fast.

To fast or too fast: which one should you use?

Use too fast when you could swap in “excessively fast.” Use to fast when the sentence is about the action of not eating, or when “to” points at a noun like music, food or lanes.

Compare these pairs:

• The car was going too fast. (It could be “excessively fast,” so it needs too.)
• He wants to fast until sunset. (It means to go without food, so it is the verb.)
• They listened to fast jazz. (Here “to” links “listened” to “jazz.”)

Common mistakes with to fast and too fast

• ✗ Slow down, you’re driving to fast.
  ✓ Slow down, you’re driving too fast.
• ✗ The song is to fast to sing along with.
  ✓ The song is too fast to sing along with.
• ✗ He decided too fast for the weekend.
  ✓ He decided to fast for the weekend.
• ✗ She talks to fast for me to follow.
  ✓ She talks too fast for me to follow.
• ✗ I love listening too fast music.
  ✓ I love listening to fast music.

How can you remember which one to use?

The easiest check is to ask whether you mean “too much.” Here are three memory tricks:

1. The extra o: “Too” has an extra o, and extra means excessive. Too much speed is too fast.
2. The swap test: Replace the word with “excessively.” If the sentence still works, use too.
3. The food test: If you can add “for a day” or “before the test” after it, you mean the verb: to fast.

FAQ: To Fast or Too Fast

Is it ‘to fast’ or ‘too fast’?

Use ‘too fast’ when you mean faster than is safe, wanted or possible. Use ‘to fast’ only when ‘to’ goes with the verb fast (to go without food), or when ‘to’ is a preposition before ‘fast’ describing a noun, as in ‘listen to fast music’.

What does ‘too fast’ mean?

It means faster than is safe, comfortable or desirable. For example: the video plays too fast to follow.

Can ‘to fast’ mean ‘very fast’?

No. If you mean very fast or excessively fast, the correct word is too. Writing to fast for that meaning is a common spelling mistake.

What is the difference between to and too?

To is a preposition or the marker of an infinitive verb, as in go to school or to run. Too means also or excessively, as in me too or too loud.

How can I quickly check which one to use?

Try replacing the word with excessively. If the sentence still makes sense, use too. If it does not, you probably need to.

Conclusion

When you’re stuck on to fast or too fast, remember that “too fast” means excessive speed and “to fast” belongs to the verb for going without food. When in doubt, try the “excessively” swap. Share this with someone who mixes these up!