The Lens Formula Calculator is a physics tool used to calculate the focal length, object distance, or image distance of a lens using the lens formula 1f=1v+1u\frac{1}{f} = \frac{1}{v} + \frac{1}{u}f1​=v1​+u1​. By entering any two known values, the calculator instantly computes the third, allowing users to understand how light rays form images through convex or concave lenses. This calculator is ideal for students, teachers, and researchers studying optics and image formation, offering a clear and responsive interface perfect for classrooms or educational websites.