Affiliate Disclosure

Last updated: June 10, 2026

How this site is funded

ContactLensCalculator.net is free to use. To keep it that way, some of the links to contact lens retailers on this site are affiliate links. If you click one of those links and make a purchase, the retailer may pay us a commission.

This never changes the price you pay. The commission comes out of the retailer's marketing budget, not your pocket.

How we choose retailers

Retailers shown in our "Where to fill your prescription" module are listed because they are established contact lens sellers in the United States. A retailer being an affiliate partner does not change your calculator results: the conversion math runs entirely in your browser and is identical whether or not you ever click a retailer link.

Affiliate links on this site are marked with rel="sponsored" for search engines, and a short disclosure note appears next to each retailer module.

Not medical advice

Everything on this site, including the calculator results, is informational only and is not medical advice, a medical device, or a substitute for a professional contact lens fitting. Glasses and contact lens prescriptions are not interchangeable documents: contact lenses require base curve and diameter measurements that only an eye care professional can determine.

Always verify any converted prescription with your optometrist or ophthalmologist before ordering contact lenses, and order only with a valid contact lens prescription.

Questions

If anything here is unclear, you can reach the team via the details on our About page.