GottaDose / Free tools / Refill date calculator
When will my pills run out?
Divide the pills you have by the pills you take in a day. That's how many days the supply lasts. The calculator below does the math, handles every-other-day schedules and shows when to order the next pack.
How the calculation works
Days of supply = pills you have ÷ (pills per dose × doses per day)
The result is rounded down, because half a day's pills won't cover the evening dose. If you take the medicine every other day, one day's pills cover two calendar days.
An example
You have 45 tablets and take 1 tablet twice a day. That's 2 tablets a day, and 45 ÷ 2 = 22.5, so the pack covers 22 full days. Counting from November 12, the last full day is December 3. One tablet is left for the morning of December 4, and that evening's dose is the first one you won't have. To get a new pack a week ahead, order by November 27.
What can move the date
- Extra as-needed doses. Each one brings the date closer.
- A new dose from your doctor. Run the numbers again.
- Pills that were dropped, lost or damaged.
- Holidays and weekends, when the pharmacy may need more time.
Questions
How many pills do I need for 30 days?
Multiply pills per dose by doses per day, then by 30. One tablet twice a day needs 60 tablets for 30 days. With every-other-day doses, 30 days need 15 days' worth of pills.
What if I take different amounts in the morning and at night?
Add up the day's total and enter it as one dose a day. For 1 tablet in the morning and 2 at night, enter 3 pills per dose and 1 dose per day.
Does it work for liquids, drops or inhalers?
Yes, as long as both fields use the same unit: milliliters in the bottle and milliliters per dose, or puffs in the inhaler and puffs per dose.
How early can I refill a prescription?
That depends on the pharmacy, your insurance and the medicine. Ask the pharmacy how early they can fill it, and use that number for the days to order ahead.
Is what I type saved anywhere?
No. The calculator runs in your browser. Nothing is sent or stored.
Let GottaDose do the counting. Every dose comes off the count, you get a heads-up when a pack runs low, and a new pack goes in with one tap. Coming soon to the App Store.
See what GottaDose doesThis calculator does arithmetic and doesn't give medical advice. Follow your doctor's instructions and the label from your pharmacy. Also free: the prescription abbreviation decoder.