Health · official-source review · reviewed 2026-10-10
A bottle of tablets does not tell you how many days it covers.
Turn a tablet count, a daily dose, and a refill lead time into days of supply and the order-by point.
Anyone managing a repeat prescription and its refill timing.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Count the tablets, capsules, or units you have left. Do not use the number on an old label.
Read the doses per day from the current label. If it says as needed, use your typical count.
Divide the count by the daily dose and round down. That is your days of supply.
Write the days your pharmacy needs to fill a refill, including any prescriber approval.
Subtract the lead time from the days of supply. When the result reaches zero, order.
You have 60 tablets at 2 a day and a 7-day refill lead time. That is 30 days of supply and 23 days before you must order.
Use your own source and details. The example is not a record about a real person or organization.
U.S. National Library of Medicine, MedlinePlus · reviewed 2026-10-10
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 numbers on your label. It does not give medical advice or change any dose.
Your prescription label and pharmacist instructions govern your own dosing schedule.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Turn a tablet count, a daily dose, and a refill lead time into days of supply and the order-by point.
This App divides the numbers you enter. It does not give medical advice, verify a label, or change any dose.
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
Turn a tablet count, a daily dose, and a refill lead time into days of supply and the order-by point.
Free · no account · no upload
Open Prescription Days Supply CheckThe 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 Days Supply Check. 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.