A medication schedule keeps producing small sums: how many days are left in the bottle, what “every eight hours” means in real times, what happens to both when you fly. These four do that arithmetic.
Medication tools
Four calculators · no account · nothing leaves your browser
Pills left → order-by date
Refill date
Pills left, doses per day, and a buffer in — a run-out date and an order-by date out.
Every N hours → clock timesDose interval
Turns “every 8 hours” into real clock times, and flags the doses that land overnight.
Home time → local timeTime zone shift
Compares keeping local time against keeping your body's schedule after a flight.
Meds and slots → printable weekOrganizer planner
Builds a printable 7-day grid to fill your weekly organizer against.
What these are not
None of these tools give medical advice. They do arithmetic on numbers you type in. Anything about which medication to take, whether a dose can move, 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.