Everyday care, by the numbers
Small daily habits matter for your teeth: how long you brush, how often you snack, how worn your brush is and what's in your toothpaste. These tools turn the official advice into something you can check in a minute. Everything runs in your browser. Nothing you enter is sent anywhere.
Key facts at a glance
| Habit | What the advice says | Source |
|---|---|---|
| Brushing | 2 minutes, twice a day, with fluoride toothpaste | ADA |
| When to brush | Last thing before bed, and once more in the day | NHS |
| After brushing | Spit out the extra toothpaste, but don't rinse | NHS |
| Between teeth | Clean between your teeth once a day | ADA |
| New toothbrush | Every 3–4 months, or sooner if frayed | ADA |
| Toothpaste abrasivity | RDA 250 or less is considered safe and effective | ADA |
| Acid attack after sugar | About 20 minutes to up to an hour | ADA; Oral Health Foundation |
Which tool do you need?
Wondering if your toothpaste is too harsh? The Toothpaste RDA Chart lists the abrasivity of 95 toothpastes. You can search, sort, filter and compare up to three side by side. Each value is marked as measured in a lab study or reported from an online chart we couldn't verify, because most RDA numbers online have no traceable source.
Not sure you brush long enough? The Two-Minute Brushing Timer splits two minutes into 4 or 6 zones. It highlights each zone on a mouth diagram and gives one technique tip at a time. It keeps your screen on, can beep at each change, and keeps a private morning-and-night streak. Brushing with a child? The Kids Brushing Timer adds a friendly guide and stickers.
Snack or sip a lot? The Sugar Acid-Attack Calculator maps a typical day on a 24-hour acid clock. It shows how many acid attacks your teeth get and how long they last. Then it picks the three changes that would cut the most acid time, like moving a snack to a meal or finishing a drink in one sitting.
Can't remember when you last changed your toothbrush? The Toothbrush Replacement Reminder works for your whole household, with manual brushes and electric heads. You get replace-by dates and a calendar file that reminds each person every 3 months.
Bad breath, sensitive teeth or stains? Three short checklists rank what's most commonly linked with your answers and what to change first. The Bad Breath Cause Finder starts with the mouth, where most bad breath begins, and flags fruity breath as a medical warning sign. The Tooth Sensitivity Quiz separates the common short, sharp sensitivity from signs that need a dentist. The Teeth Stain Risk Quiz scores your stain habits, explains surface versus inside stains, and compares whitening options.
Why small habits add up
Frequency matters. Each time you eat or drink sugar, plaque bacteria make acid for a while afterwards. The Oral Health Foundation notes that if you snack often, your teeth have little time to recover. The ADA explains that sipping a sugary drink gives bacteria more time to use the sugar. So a soda nursed over an afternoon can be harder on teeth than the same soda with lunch.
Gentle technique matters. The ADA's method is a soft brush at about 45 degrees to the gums, using short, gentle strokes on every surface. A worn brush doesn't clean as well (ADA MouthHealthy), so replace it every 3–4 months.
For toothpaste, fluoride comes first. Fluoride helps prevent cavities. For children, the Kids Fluoride Calculator shows how much toothpaste to use at each age. Abrasivity matters most if you have exposed roots or worn enamel, and then it's worth asking your dentist which paste suits you.
Save your progress on this device
The brushing streak and the toothbrush dates can be saved to My Smile, a private dashboard stored only in your browser. There's no account and no email. You can delete it any time.
These tools are for everyday care and planning. They don't replace a checkup. If you have pain, swelling, bleeding gums that don't settle, or a tooth that's suddenly sensitive, see a dentist.
Frequently asked questions
How long and how often should I brush my teeth?
Is my toothpaste too abrasive?
How long does an acid attack on teeth last?
How often should I replace my toothbrush?
What toothpaste helps sensitive teeth?
Sources
- American Dental Association. Toothbrushes (Oral Health Topics). updated August 2026. Accessed October 26, 2026.
- American Dental Association. Toothpastes (Oral Health Topics). updated February 11, 2026. Accessed October 26, 2026.
- American Dental Association (MouthHealthy). Brushing Your Teeth. Accessed October 26, 2026.
- American Dental Association (MouthHealthy). Toothbrushes. Accessed October 26, 2026.
- NHS. How to keep your teeth clean. reviewed June 30, 2025. Accessed October 26, 2026.
- American Dental Association (MouthHealthy). Module 2: Plaque Attack! (Smile Smarts lesson plan). 2005. Accessed October 26, 2026.
- Oral Health Foundation. Tips to Reduce Risks of Grazing All Day. Accessed October 26, 2026.
- American Dental Association (MouthHealthy). Sugar, Drinks and Dental Health. Accessed October 26, 2026.
Last reviewed by the Dental Health Time editorial team, against the sources above. How we review.