Medication refill calculator
Estimate when your supply runs out and when to organise your next repeat prescription.
Enter your prescription details
Your next action date
Monday 2 November 2026
Organise your repeat by this date to avoid reaching the end of your current pack.
Act in
21 days
from today
Current pack ends
Monday 9 November 2026
28 days away
All repeats exhausted
Monday 29 March 2027
New script from GP needed after this
Turn this result into an automatic reminder
Your pack runs out on 9 Nov. Organise your repeat by 2 Nov.
Save this medication in MediRemind to receive reminders before you need to act and keep your remaining repeats organised.
Track My Medication in MediRemindCalendar adds one reminder. MediRemind tracks ongoing repeats, run-out dates and multiple medications.
Available with a 30-day trial, then a subscription
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How to plan your next medication refill
Simple arithmetic, no data is sent anywhere, everything runs in your browser.
Days per pack
Pack size ÷ dose frequency = how long one pack lasts. For once-weekly injections, we count each injection as one dose.
Current pack runs out
Last dispense date + days per pack.
Total supply
Last dispense date + days per pack × (repeats + 1). Includes the pack you're currently using.
Organise-by date
Current pack run-out − 7 days (or − 14 days if no repeats remain, to allow time for a GP appointment). This is your action deadline.
Get ahead of your next refill.
Track your prescriptions, remaining repeats and action dates in MediRemind, with reminders when it's time to organise your next repeat.
Frequently asked questions
How do you calculate when I'll run out of my medication?
We divide your pack size by your daily dose equivalent to get how many days each pack lasts. Multiply that by (repeats + 1) to get your total supply in days, then add that to your last dispense date.
Why 7 days notice to organise a repeat?
Most pharmacies in Australia can dispense a PBS repeat the same day, but GPs sometimes need to write a new authority script, which can take 1–3 business days, plus you may need an appointment. Seven days gives you a comfortable buffer even during public holidays. For medications with no repeats remaining, we use 14 days to allow time to get a GP appointment and have the new script dispensed.
What if I have 0 repeats left?
When you have no repeats remaining, you need a new prescription from your GP before you run out. We use a 14-day buffer (instead of 7) to account for GP appointment wait times. In much of Australia, seeing a GP within a week can be difficult, booking early is important for chronic medications.
Does this work for all medications, PBS and private?
Yes. The calculator works for any medication regardless of whether it's PBS-subsidised or private. It uses pack size and dose frequency, so it's suited to tablets, capsules, and regular injections like Ozempic or Wegovy.
Does MediRemind do this automatically?
MediRemind calculates reminder dates from the medication and repeat details you enter. After each dispensing, update the remaining repeat count so future reminders stay accurate. You enter your details once. MediRemind handles the scheduling and reminds you before you need to act.
Can I use this for GLP-1 weekly injections like Ozempic or Wegovy?
Yes, select 'Once weekly' under 'How often do you take it?' and the calculator adjusts automatically. The pack size field will ask for injections per pen or pack, and we'll calculate your run-out date and organise-by date from there.