Health · official-source review · reviewed 2026-10-26
A larger pack is not automatically cheaper, and a smaller pack is not automatically the budget choice.
Turn two pack prices, unit counts, and your daily dose into a cost per day and a 90-day difference.
Anyone comparing two pack sizes of the same medicine at their own dose.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Take the units a day from the label or your prescriber. Do not change the dose to fit a pack.
Use the tablets, capsules, or units in the pack, not the box count.
Use the cash price or the price after insurance, whichever you would pay.
The App divides each price by the days the pack lasts at your dose.
The 90-day figure shows whether the cheaper pack is worth the extra storage.
A $24 pack of 30 units at two a day costs $1.60 a day. A $42 pack of 90 costs $0.93 a day, saving $60 over 90 days.
Use your own source and details. The example is not a record about a real person or organization.
Two pack comparisons. Both are examples.
Both cases are examples, not records about a real person. The bars show the same numbers the free App computes.
U.S. Food and Drug Administration · reviewed 2026-10-26
What this source supports: Patients should plan refills ahead of time to avoid running out of essential medications over weekends and holidays.
Source limit: Pharmacy lead times vary; call your pharmacist well before you run out.
U.S. National Library of Medicine, MedlinePlus · reviewed 2026-10-26
What this source supports: MedlinePlus publishes consumer drug information pages maintained by the National Library of Medicine.
Source limit: Your prescription label and pharmacist instructions govern your own dosing schedule.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This guide divides the prices you enter. It does not price a pharmacy, check coverage, or give dosing advice.
Pharmacy lead times vary; call your pharmacist well before you run out.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Compare two prescription pack sizes by cost per day at your own dose.
This App divides the numbers you enter. It does not quote a pharmacy, check coverage, or give dosing advice.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Compare two prescription pack sizes by cost per day at your own dose.
Free · no account · no upload
Open Prescription Pack Size Cost per DayThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Prescription Pack Size Cost per Day. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.