Contact Lens Schedule Tracker

Plan your lens replacement schedule, calculate daily wear costs, and build a sustainable eye care habit. Supports daily, bi-weekly, and monthly lenses. All calculations run instantly in your browser—no data is sent online.

Educational tool only, not medical advice. Always follow your eye care professional's instructions.

Lens Schedule Calculator

Lens Replacement Type *

How often you replace a single pair.

Start Date *

When you opened/started using this pair.

Price per Box (optional)

For cost estimation.

Lenses per Box (optional)

Total pairs in the box.

Your Lens Schedule & Cost

Next Replacement Date: --

Days Until Replacement: --

Estimated Cost per Day: --

Boxes Needed per Year: --

Why Tracking Your Lens Schedule Matters

Using contact lenses beyond their recommended replacement schedule increases the risk of eye irritation, infections, and deposits that can reduce vision clarity. This tool helps you visualize your schedule and costs, making it easier to adhere to your eye doctor's recommendations and budget effectively.

Step-by-Step Guide

Select your lens replacement type (daily, bi-weekly, monthly).
Enter the date you started using your current pair.
Optionally add your box price and lens count for cost insights.
Review your next replacement date and daily cost.
Use the copy button to save your results for your records.

Realistic Examples

Lens Type	Start Date	Next Replace	Daily Cost*
Daily	Today	Tomorrow	~$1.50
Bi‑Weekly	Jan 1	Jan 15	~$0.35
Monthly	Jan 1	Jan 31	~$0.25

*Sample costs based on typical retail prices; your actual cost will vary.

Replacement Schedule Reference

Lens Type	Max Wear Period	Common Box Sizes	Key Consideration
Daily Disposable	1 day	30, 90 pairs	No cleaning; lowest infection risk.
Bi‑Weekly	14 days	6 pairs	Requires proper cleaning & storage.
Monthly	30 days	3 or 6 pairs	Regular enzyme cleaning recommended.

Cost Explorer: Adjust Your Usage

See how changing your lens type affects your annual cost.

Select Lens Type

Box Price ($) 45.99

Estimated Annual Cost

$--

Frequently Asked Questions

How accurate is this schedule?

The schedule is based on the manufacturer's maximum recommended wear period. Your eye doctor may recommend a shorter replacement interval based on your eye health, lens material, or environment.

What if I occasionally wear my lenses longer?

Extending wear increases risks of discomfort, infection, and lens deposits. Always adhere to the schedule prescribed by your eye care professional. If you must extend, ensure meticulous cleaning and monitor for redness or irritation.

How do I measure "start date" for bi-weekly/monthly lenses?

The start date is the day you first wear a new, freshly opened pair. Mark it on the lens blister pack or set a calendar reminder. Do not reset the clock if you skip a day of wear.

When should I seek professional advice?

If you experience persistent redness, pain, blurred vision, light sensitivity, or discharge, remove your lenses immediately and contact your eye doctor. Do not wait for your scheduled replacement.

Formulas & Assumptions

Replacement periods: Daily = 1 day, Bi‑weekly = 14 days, Monthly = 30 days.
Days until replacement = Replacement period – (Today – Start Date).
Daily cost = (Box Price / Lenses per Box) / Replacement period.
Yearly boxes = 365 / (Replacement period × Lenses per Box).
All dates use your local browser time; calculations assume continuous daily wear.
Rounding: Costs rounded to nearest cent; days rounded down.

For informational and educational purposes only. Estimates depend on your inputs and simplifying assumptions. This tool is not medical advice and does not diagnose or treat any condition. If you have symptoms, abnormal readings, or urgent concerns, contact a qualified healthcare professional.

Sources & References

Common contact lens replacement guidelines and hygiene recommendations from eye care associations. General principles of cost‑per‑use calculation and habit formation.

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Contact Lens Schedule Tracker

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