How to use this calculator
- Enter the liquid volume dispensed.
- Enter the prescribed milliliters per dose.
- Add the prescribed daily frequency.
- Choose a buffer and use the estimated duration to plan a refill.
#2647 · Agriculture & Pets Tool
Pet Medication Capacity Calculator
Estimate how many doses a liquid medication container provides and when the usable supply may run out. Enter bottle volume, prescribed volume per dose, daily frequency, and a reserve percentage for measurement loss or an early-refill buffer. The result can help plan refills, but it should not be used to extend treatment or change the prescribed dose.
Calculator
Enter your assumptionsFormula
Usable volume = bottle volume × (1 − reserve %). Complete usable doses = floor(usable volume ÷ dose volume). Supply days = usable doses ÷ doses per day.
What the result means
Supply duration reflects only complete doses available below the chosen reserve. The reorder point subtracts a simple three-day lead-time buffer.
Actual extractable volume and refill rules vary. Never reduce a dose to make a bottle last longer; contact the veterinary clinic or pharmacy if supply is short.
Example calculation
A 100 mL bottle with 2.5 mL doses, twice daily, and a 5% reserve has 95 mL usable volume, 38 complete doses, and 19 days of usable supply.
Tips for better results
- Check whether the bottle must be shaken before measuring.
- Use the supplied oral syringe or another appropriate device.
- Track each administered dose to avoid counting errors.
- Start refill requests before weekends or holidays.
- Keep storage temperature and expiration requirements in mind.
Frequently asked questions
Why does the calculator round down the number of doses?
A partial remainder may not contain a complete prescribed dose, so only whole administrations are counted.
What is the reserve buffer for?
It can represent measuring loss, medication left in the bottle, or supply held back for refill lead time.
Does the estimate account for bottle overfill?
No. It uses only the labeled volume you enter.
Can I reduce each dose if the bottle will run out early?
No. Contact the prescribing veterinarian or pharmacy instead of changing the prescribed amount.
Why is the reorder point three days before the estimated end?
It is a planning assumption. Request earlier if your clinic, pharmacy, shipping, or authorization process takes longer.
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Supply variables
| Variable | Meaning | Unit |
|---|---|---|
| Bottle volume | Dispensed liquid quantity | mL |
| Dose volume | Prescribed liquid each administration | mL |
| Frequency | Administrations each day | doses/day |
| Reserve | Unused planning buffer | percent |