Calculator Scope
This calculator estimates dates using basic days-supply math. It does not decide whether a prescription can be legally, clinically, or operationally refilled. Final refill availability depends on your prescriber, pharmacy, insurance plan, medication type, state rules, and pharmacist judgment.
RefillDateCalculator.org is built as a general planning tool for date math. It is not a substitute for advice from a prescriber, pharmacist, insurer, attorney, or other qualified professional.
Controlled Substances
This tool estimates timing only. Controlled substances may require a valid new prescription and may be affected by federal law, state law, prescriber instructions, pharmacy policy, PDMP review, and pharmacist judgment.
Confirm Final Availability
A calculated date may differ from the final date shown by a pharmacy or insurance plan. Contact your pharmacy or insurance plan to confirm whether a refill can be processed.