Medication Refill Date Calculator
When should you request your next medication refill? Enter your prescription start date, days supply, and early-fill buffer to get the exact date to call your pharmacy.
Refill Request Date
Medication Refill Timing
Empty Date = Start Date + Days Supply Refill Request Date = Empty Date - Buffer Days
Why request early?
- Pharmacy processing takes 1–2 days
- Insurance often allows refills 7 days early (80%+ used)
- Mail-order pharmacies may need 10–14 days lead time
- Never wait until the last day — running out of certain medications can be serious
Insurance early fill rules: Most insurance plans allow refills when 75–80% of the supply is used. For a 30-day supply, this means day 22–24.