Medication Calculators
RefillDay has a calculator for each common refill question. They share one engine, so dates and rounding work the same way everywhere, and none of them send your information anywhere.
Which calculator do I need?
| If… | Use |
|---|---|
| I want to know when to refill | Pill Refill Date Calculator |
| My label shows the days supply and I want the next dates | Refill Date Calculator |
| I want to know when my refills run out | Prescription Refill Calculator |
| Insurance said "refill too soon" | Refill Too Soon Calculator |
| How long will this many pills last? | Days Supply Calculator |
| My dose changes by day, weekly, or is a taper | Medication Days Supply Calculator |
| How many pills should be left today? | Pills Remaining Calculator |
| How many pills do I need for a number of days? | Medication Quantity Calculator |
| My dose is in mg and I need tablets per dose | Tablets & Capsules Calculator |
| It is a liquid measured in mL | Liquid Medication Days Supply Calculator |
| My dose is prescribed in mg/kg of body weight | Dosage Calculator (mg/kg) |
| I want to pay less for my prescription | Copay Savings Calculator |
| I am waiting on a prior authorization | Prior Authorization Timeline Calculator |
Refill dates
- Pill Refill Date Calculator: Refill date, days left and pills left today, plus a tracker for all your medications.
- Refill Date Calculator: Next refill date plus a year of upcoming refill dates for your calendar.
- Prescription Refill Calculator: When your remaining refills run out and when to ask for a new prescription.
- Refill Too Soon Calculator: Compare possible earliest-refill dates and understand rejections.
Days supply
- Days Supply Calculator: How many days a quantity of pills lasts at your dose.
- Medication Days Supply Calculator: Days supply for weekday patterns, weekly doses and tapers.
- 30 Day Refill Calculator: Quantity and next refill date for a monthly supply.
- 60 Day Refill Calculator: Dates and quantity for a two-month supply.
- 90 Day Refill Calculator: Three-month supplies, including mail-order timing.
Pills & doses
- Pills Remaining Calculator: Expected pill count on any date, compared with your real count.
- Medication Quantity Calculator: How many pills you need to cover a number of days.
- Tablets & Capsules Calculator: Turn a dose in mg into tablets or capsules per day.
- Liquid Medication Days Supply Calculator: Doses and days in a bottle of liquid medicine.
- Dosage Calculator (mg/kg): Check the math on a prescribed mg/kg dose, including mL.
Cost & coverage
- Copay Savings Calculator: Compare 30-day, 90-day, mail-order and cash prices per year.
- Prior Authorization Timeline Calculator: Decision deadlines for prescription prior authorizations and appeals.
Supply lengths at a glance
Looking for a specific supply length? The 30-day, 60-day and 90-day calculators each show the quantity you need at your dose and every refill date for the next year.