AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/replace-toothbrush

How often should you replace a toothbrush?

Every 3 to 4 months, sooner if bristles fray.

Start playing free

  1. Every 3 to 4 months ✔
  2. Once a year
  3. Only when you lose it

Why: Replace it every three to four months, or sooner if the bristles are matted or frayed. Worn bristles clean less effectively.

Huh, didn't know that: Brush for two minutes twice a day with a soft-bristled toothbrush.

The dad joke
What did the tooth say to the toothbrush? You brush me off so easily.
Like this card?
Play the game

References

Answer: Every 3 to 4 months. Replace it every three to four months, or sooner if the bristles are matted or frayed. Worn bristles clean less effectively.

  1. American Dental Association: Toothbrushes www.ada.org/resources/ada-library/oral-health-topics/toothbrushes
    Replace toothbrushes every three to four months or more often if the bristles are visibly matted or frayed.
    Checked 2026-10-09.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Kids SkillsHow much Halloween candy should you eat?Kids SkillsHow long should you wash your hands?Kids SkillsHow much sleep does a school-age kid need?

That's stuff everyone should know.