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A medication schedule keeps producing small sums: how many days are left in the bottle, what “every eight hours” means in real times, what the pack actually costs per day. These 29 do that arithmetic.
Clocks going back or forward? Daylight saving time and your medication schedule shows what happens to your dose times.
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How much you have, how long it lasts, what it costs.
Pills left, doses per day, and a buffer in — a run-out date and an order-by date out.
Quantity ↔ days of supplyConverts a quantity into days, or a number of days into the quantity to ask for — including part-packs.
Pack price → cost per dayBreaks a pack price down to the dose, the day and the year, and compares two pack sizes properly.
Fill date → earliest refillWorks out the first day a refill is likely to go through, and how many days early is too early.
Start date → pills left todayHow many should be left by now, and what a count that does not match is telling you.
Refills left → last day coveredHow far the refills on your prescription actually get you, and when to ask for a new one before they run out.
Trip dates → pills to packHow many to pack for a trip, counting both travel days and a few spare in case you are delayed.
Puffs left → empty dateTurns the number on the dose counter into the day the inhaler runs out, and the day to reorder by.
Bottle ml → doses and run-out dateHow many full doses are in a bottle of liquid medicine, how many days that lasts, and what is left over.
Tablets ↔ monthsHow many months 180 tablets last at twice a day, or how many tablets three months needs. 30-day, 28-day and calendar months.
When each dose lands, and what is still in you when it does.
Turns “every 8 hours” into real clock times, and flags the doses that land overnight.
Home time → local timeCompares keeping local time against keeping your body's schedule after a flight.
Half-life → what is left nowHow much of a dose remains after N hours, when it is effectively cleared, and how much builds up on a repeating schedule.
Days on and off → real datesLays out a 21-on-7-off or every-N-weeks schedule as real dates, so the next start is not mental arithmetic.
Times a day → clock timesTurns “three times a day” into real times that fit between when you wake up and when you go to bed.
Last doses → next allowed timeFor “every 4 hours, no more than 4 in 24 hours” labels: the earliest the next dose is allowed, and which limit decides it.
Your steps → dated taperPuts calendar dates on the taper steps your prescriber gave you: when each step starts, when it ends, and the final day.
A course → date of the last doseWhen a 10-day course or a box of 21 tablets actually finishes: the day and time of the last dose, counted from the first.
Every N hours ↔ times a day“Every 6 hours is how many times a day?” Both directions, and what happens when the gap does not divide into 24.
Method & cycle day → protected fromWhen a new combined pill, progestogen-only pill, ring or injection starts protecting against pregnancy, based on NHS guidance.
Last injection → next shot dueDate of your next contraceptive injection and the late-but-still-covered window, following CDC and NHS guidance.
Insert date → remove and new-ring datesEnter the day you put the ring in. See when to take it out, when the ring-free week ends, and the date of the next ring.
Start date → dose stepsTirzepatide dosage chart, and dose steps by date for Mounjaro, Zepbound, Wegovy (shot or pill) and Foundayo, with each label's missed-dose rule.
BID, TID, QID → clock timesType the directions as written, like “1 tab PO TID”, and get them in plain words with real dose times. Warns about abbreviations on the “Do Not Use” list.
Hours late → what to doMissed or late pill? Tells you what to take now, whether you need condoms and until when, and when to skip the placebo week, by the CDC rules.
What to load into the box, and what to tell the doctor.
Builds a printable 7-day grid to fill your weekly organizer against.
Your meds → printable list & CSVEnter your medicines and when you take them, then print a list, a daily schedule chart with a 7-day log, or a blank template.
Doses taken → adherence %Turns doses taken and missed into the percentage a doctor or insurer would use, and how many you can still miss.
A course → printable calendarLays a course out across dated weeks with a box per dose, sized to print and stick on the fridge.
None of these tools give medical advice, and none of them will compute a dose for you. They do arithmetic on numbers you type in. Anything about which medication to take, whether a dose can move, how to taper, or what to do about a missed dose belongs with your doctor or pharmacist — and a pharmacist will usually answer it in under a minute on the phone.
If you would rather have the scheduling handled for you, Doz is a free iPhone app that keeps prescriptions, doses and stock counts in one place. There is also a blog covering the habits these tools support.