Prescription Refill Calculator
Days Supply, Quantity & Dates
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Launch offer: Pro Lifetime is 80% off—one-time purchase, no subscription. Days supply, refill dates and quantities, with every step shown.
Calculate prescription refill dates, days supply and medication quantities quickly and clearly.
Prescription Refill Calculator helps patients, caregivers, pharmacy students and healthcare professionals perform common medication calculations without relying on mental math.
REFILL DATE CALCULATOR
Enter the original fill date and days supply to calculate:
• Suggested refill date
• First and last covered dates
• Next coverage date
• 28-day, 30-day, 60-day and 90-day schedules
• Early refill date adjustments
DAYS SUPPLY CALCULATOR
Calculate how long a dispensed medication should last using:
• Quantity dispensed
• Units used per dose
• Doses per day
• Custom frequencies
• Optional rounding rules
QUANTITY CALCULATOR
Estimate the quantity required for a selected treatment period:
• 30-day supply
• 60-day supply
• 90-day supply
• Custom treatment durations
• Tablets, capsules and other dosage forms
MULTIPLE DOSAGE FORMS
Use dedicated calculations for:
• Tablets and capsules
• Oral liquids
• Inhalers
• Nasal sprays
• Eye drops
• Ear drops
CLEAR, EXPLAINED RESULTS
Every result includes a step-by-step breakdown so you can understand how the calculation was produced. Save useful calculations and quickly access them again from your private history.
PRIVACY FIRST
Medication names are optional. Your saved calculations remain on your device, and no account is required.
REFILL PRO
Unlock additional tools with one lifetime purchase:
• Remove advertising
• Reverse quantity calculations
• 30-day, 60-day and 90-day presets
• Inhaler and nasal spray calculators
• Eye and ear drop calculators
• Unlimited calculation history
• Saved favorites and templates
• Shareable PDF summaries
IMPORTANT DISCLAIMER
This app is an informational calculation tool only. It does not provide medical advice, diagnose conditions, determine prescription eligibility or authorize an early refill. Results depend entirely on the information entered by the user.
Prescription rules, insurance coverage and pharmacy policies can vary. Always follow the prescription label and consult your pharmacist, prescriber or another qualified healthcare professional before making decisions about medication use or refill timing.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A brand-new look.
• Redesigned throughout: a calmer, cleaner design for every calculator, result and screen, with new Refi illustrations.
• Dark mode: the app now follows your device's light or dark appearance.
• Welcome screen: a short introduction the first time you open the app.
• Filters for History and Favorites, so saved calculations are quicker to find.
• Improved layouts across small phones, large phones and iPad.
• Launch offer: Pro Lifetime is 80% off for a limited time. Still a one-time purchase, no subscription.
Calculators still work offline, and every result still shows the math.
The developer, chamuditha jayasena, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- chamuditha jayasena
- Size
- 44.8 MB
- Category
- Medical
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Frequent
Medical Treatment information
Infrequent
Alcohol, Tobacco, Drug Use or References
Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- Refill Pro Lifetime $2.99
- Copyright
- © 2026 Chamuditha Jayasena