What does this tool do?

It calculates your run-out date and the earliest date you could be eligible to refill based on the last fill date, day-supply, an optional early-refill offset, and the counting rule. It performs date math only; policies vary by pharmacy and insurer.

Does it work for controlled stimulants?

The math works the same, but many stimulants and other controlled substances have stricter refill rules and limited early refills. The app shows a heuristic flag, but you should confirm actual rules with your pharmacy and insurer.

What is “Count the fill date as Day 1”?

If enabled, the pickup date is day one of your supply. If disabled, counting starts the day after. Choose the rule that matches your pharmacy’s practice.

Yes. All calculations and saved medications live in your browser’s localStorage. No account. No server-side logging.

Can I track multiple medications?

Yes. Use the Track all my meds panel to add meds. Each shows run-out, earliest refill, status, and lets you export a calendar reminder. Your list is saved locally and reloads next visit.

Which timezone is used?

The tool uses your device’s local timezone and displays it at the top of the page.

When Is My Next Refill? • Simple Refill Date Calculator

Last fill date

Pick the day the pharmacy dispensed your meds. Results show after you click Calculate.

Days of supply

Common values: 28, 30, 31, 60, 90.

Early refill days allowed

Enter 0 for no early pickup.

Counting rule

Count the fill date as Day 1

Most pharmacies count the fill date as the first day of use. Uncheck to count from the next day.

How would you like to use this?

Quick calculation

Track my meds

When Is My Next Refill?

Quick calculation

Run out date

Earliest refill date

Days remaining

Status today

Track all my meds