First, the honest part
What this calculator can't know
It's simple division, and it's only as good as your count. It assumes every scheduled dose is taken, one pill per pill. It doesn't know how many refills are left on your prescription, how many days ahead your insurance lets you refill, or whether your pharmacy has the medicine in stock.
One design decision
We show a "call by" date a full week before the run-out date, not the day before. A week leaves time for a prescriber callback or a back-order, and it's the buffer we'd want for our own parents.
One honest limit
DoseBeacon works the same way inside the app: supply is an estimate, it isn't connected to any pharmacy, and it never orders refills. The free plan covers 2 active medications; more need DoseBeacon Family.
Who should pick something else
If your pharmacy's own app already handles auto-refill and pickup alerts for every medicine, that may be all you need. If you want refills ordered for you, ask your pharmacy about auto-refill or a mail-order plan.
Quick answers
How do I work out when my prescription will run out?
Count the pills you have, divide by the number you take each day, and add that many days to today. 45 pills at 2 a day is 22 full days, so if you count on November 4 you'll take the last dose on November 25 and need the refill in hand by November 26.
Pills on hand ÷ pills per day = full days left. Then add a week of buffer.
What about liquids, inhalers or injections?
The same idea works with doses instead of pills: doses left divided by doses per day. Use the amount on the label, or the device's dose counter if it has one. If you aren't sure how many doses a pen, bottle or inhaler holds, your pharmacist can tell you.
What if I'm going to run out before my refill is allowed?
Call your pharmacist or prescriber as soon as you notice. Don't stretch doses or skip days to make the supply last unless they tell you to. MedlinePlus advises not to skip doses or stop taking your medicines on your own.
What is medication synchronization?
It's a pharmacy service where the pharmacist coordinates your refills so you can pick everything up on a single day each month, according to the APhA Foundation. The first pickup may be a shorter or longer supply to line the dates up. Ask your pharmacy whether it offers it.
Inside DoseBeacon
Refill dates that count down on their own
DoseBeacon is our pill reminder and family medication tracker. Instead of recounting the bottle, the app subtracts one from the supply each time a dose is reported, and shows the estimate next to every medicine.
"est. ~4 days" left
Every medicine, one list
PDF for the doctorFree tool
Refill timeline for all your medicines
Add up to five. We sort them by run-out date and flag the ones to call about this week. Nothing you type leaves this page.
The National Institute on Aging (reviewed September 2022) suggests keeping a written list of every medicine with its name, amount and the times you take it, and notes that people also use charts, calendars and weekly pill boxes. A refill timeline is one more page for that folder.
It also matters in emergencies. Ready.gov points out that an emergency can make it hard to refill a prescription or find an open pharmacy, so the week of buffer does double duty.
Set it up once
How refill tracking works in DoseBeacon
- Add each medicine. Type it in or scan a pharmacy label to create a draft with on-device text recognition, then check every field before any reminder turns on.
- Enter what's on hand. Each reported dose subtracts one, and days left assume every scheduled dose is used. Estimates are clearly labelled.
- Tap "Picked up" at the pharmacy. It adds your fill size back. If you share care with family, approved helpers see the same record.
Side by side
Counting the bottle vs. counting by date
Counting the bottle
- You notice when it looks low
- Each medicine runs out on a different surprise day
- Weekend and holiday gaps catch you out
Counting by date
- Every medicine has a call-by day
- You can ask about lining the dates up
- A week of buffer for callbacks and back-orders
This is general information, not medical advice. Talk to your clinician or pharmacist. DoseBeacon is a reminder and record-keeping app, not a medical device; it does not give medical advice or recommend doses.