Refill Calculator

Calculate when you need to refill your medication and track supply days

Prescription Details
Set a refill buffer to ensure you never run out of medication. 3-7 days is recommended.
Quick Presets
Frequently Asked Questions
How is the refill date calculated?
The refill date is calculated by adding the total days of supply to your last refill date. The calculator also subtracts your buffer days to give you a "refill by" date, ensuring you order medication before running out.
What is a refill buffer?
A refill buffer is the number of days before you run out that you should place your refill order. This accounts for processing time, shipping delays, or pharmacy wait times. Most experts recommend a 3-7 day buffer.
How is the days supply calculated?
Days Supply = (Pills per Bottle) รท (Pills per Day). For example, if you take 2 pills daily and have a 60-pill bottle, your supply lasts 30 days.
Why should I track my medication refills?
Tracking refills helps prevent missed doses, ensures continuous therapy, avoids emergency pharmacy visits, and can help identify if you're running out sooner than expected (which may indicate dosage changes or missed doses).
Can I use this for multiple medications?
Yes! You can use the calculator multiple times for different medications. Consider keeping a medication log or using a pill organizer to track multiple prescriptions simultaneously.
What about medications taken "as needed"?
For "as needed" (PRN) medications, the calculator may not be as accurate since usage varies. We recommend tracking your actual usage over a few weeks to determine your average daily consumption, then using that average in the calculator.
Is this calculator a substitute for medical advice?
No, this tool is for informational purposes only. Always consult your healthcare provider or pharmacist for medication management advice. Never change your medication schedule without professional guidance.

Pro Tips

  • ๐Ÿ“… Set calendar reminders for refill dates
  • ๐Ÿ“ฑ Use pharmacy auto-refill programs when available
  • ๐Ÿ’Š Use pill organizers to track daily intake
  • ๐Ÿ“ Keep a medication log for multiple prescriptions

Common Dosage Schedules

  • Once daily: 1 pill per day
  • Twice daily: 2 pills per day
  • Three times daily: 3 pills per day
  • Every other day: 0.5 pills per day
  • Weekly: 1 pill every 7 days (~0.14/day)

Safety Tips

  • โš ๏ธ Never skip doses to extend supply
  • โš ๏ธ Order refills 5-7 days before running out
  • โš ๏ธ Check expiration dates regularly
  • โš ๏ธ Store medications properly