Free calculator
3 times a day or every 8 hours? Dose time calculator
Choose what your label says – a number of times a day or every so many hours – and when you wake up and go to bed. You get clock times, the gap between doses and a warning if a dose lands while you're asleep.
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- Answer as you type
- Nothing you type is saved
3 times a day – dose times
- 7:00 am
- 3:00 pm
- 11:00 pm
- Between doses while awake8 h
- Overnight gap8 h
This calculator does arithmetic on the numbers you enter. It doesn't replace the instructions on your prescription label or the advice of your pharmacist or doctor.
Doserra reminds you at exactly these times – fixed times or every few hours – and keeps asking until you confirm the dose. Try it free
"3 times a day" vs "every 8 hours"
They sound the same but often aren't. Three times a day usually means spread over your waking hours – for example 7:00, 15:00 and 23:00 if you're up from 7 am to 11 pm. Every 8 hours means the gap itself matters, around the clock, so one dose may fall in the night.
For many medicines the waking-hours version is fine; for some, such as certain antibiotics, an even spacing is part of how they work. The label and the leaflet are the first place to check, and your pharmacist can tell you in a minute which kind of schedule your medicine needs.
Making the times fit your day
Anchor the first dose to something you do every day – waking up or breakfast – and let the rest follow. If an "every 8 hours" dose falls in the middle of the night, ask whether shifting the whole schedule is allowed; this calculator suggests the first-dose time that keeps the most doses in your waking hours.
Write the times down, or set them as reminders, so the plan survives a busy day.
From times to reminders
Get reminded at exactly these times
Add the medicine to Doserra
Choose fixed times or every N hours – both are built in.
Confirm from the notification
Taken, Remind me in 10 minutes or Skipped – one tap.
Never wonder again
Each dose is recorded, so you always know whether you took it.
Frequently asked questions
What times should I take a medicine 3 times a day?
Usually spread evenly while you're awake – for example around 7:00, 15:00 and 23:00 – unless your label or pharmacist says the doses must be exactly 8 hours apart.
Does every 8 hours mean I have to wake up at night?
Sometimes. Shifting the first dose often keeps all doses in waking hours. If that isn't possible, ask your pharmacist whether a night dose is really needed for your medicine.
What does twice a day mean?
Typically morning and evening, about 12 hours apart, for example 8:00 and 20:00. Some labels say "every 12 hours", which asks for more exact spacing.
What if I miss one of the times?
It depends on the medicine. The package leaflet usually explains it, and your pharmacist can help; don't take a double dose to catch up unless you're told to.
Guides
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ReadNever wonder again whether you took your medicine.
Add a medicine in a minute and Doserra reminds you at every dose, keeps the history and warns you before it runs out. Free for 2 medications, no account.
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