Eye Drop Days Supply Chart
Last reviewed: July 2026
Estimated days supply for common eye drop bottle sizes and usage patterns. Use this chart as a planning reference only.
| Bottle size | Est. total drops | 1 drop in 1 eye once daily | 1 drop in both eyes once daily | 1 drop in both eyes twice daily |
|---|---|---|---|---|
| 2.5 mL | ≈ 50 drops | ≈ 50 days | ≈ 25 days | ≈ 12 days |
| 5 mL | ≈ 100 drops | ≈ 100 days | ≈ 50 days | ≈ 25 days |
| 10 mL | ≈ 200 drops | ≈ 200 days | ≈ 100 days | ≈ 50 days |
| 15 mL | ≈ 300 drops | ≈ 300 days | ≈ 150 days | ≈ 75 days |
Assumes approximately 20 drops per mL. Actual days supply may vary by drop size, bottle design, waste, priming, prescription directions, pharmacy calculations, and insurance rules.
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Who this is for
This chart is for patients using prescription eye drops, caregivers managing eye medication schedules, and pharmacy learners studying days-supply calculations for ophthalmic drops.
Best used for
- Estimating days supply from common bottle sizes (2.5 mL, 5 mL, 10 mL, 15 mL)
- Comparing usage patterns (one eye vs. both eyes, once vs. twice daily)
- Understanding the drops-per-mL estimate (≈ 20 drops/mL)
- Planning refill timing with the Eye Drop Supply Calculator
Safe use note: This chart is for planning and education only. Always follow the prescription label and ask a pharmacist or prescriber about eye drop use, dosing, and disposal instructions. Actual days supply can vary.
Share or cite this resource
Free printable resource from RefillDateCalculator.org: Eye Drop Days Supply Chart — https://refilldatecalculator.org/eye-drop-days-supply-chart
Last updated: June 28, 2026