Calculate focal length of a thin lens using 1/f = (n-1)(1/R1 – 1/R2). Visual lens sketch. For JEE, NEET, AP, IB, A-Level.
About Lens Maker’s Formula Calculator
The Lens Maker’s Formula Calculator is a free, interactive online physics tool. Enter refractive index and radii of curvature to get focal length, with a schematic lens shape. It gives instant results with a clear visual and works on any device — ideal for Class 11 & 12 and college students preparing for CBSE/ICSE boards, JEE, NEET, AP Physics, IB Physics and A-Level Physics — and learners worldwide (UK, USA, Canada, Australia).
Frequently Asked Questions
Is the Lens Maker’s Formula Calculator free to use?
Yes — the Lens Maker’s Formula Calculator is 100% free, works online in your browser with no sign-up, and runs on both mobile and desktop.
Who is the Lens Maker’s Formula Calculator for?
Class 11 & 12 and college students preparing for CBSE/ICSE boards, JEE, NEET, AP Physics, IB Physics and A-Level Physics — and learners worldwide (UK, USA, Canada, Australia).
How do I use the Lens Maker’s Formula Calculator?
Enter the required values in the tool above and get instant, step-by-step results with a clear visual.
Keep exploring — 100% free