Lensmaker's Equation

🔍

advanced

Calculate focal length from lens geometry

Formula

1/f = (n-1)(1/R₁ - 1/R₂)

Lens Refractive Index

First Radius of Curvature

Second Radius of Curvature

Related Calculators

You might also find these useful

All Physics → 204+ Calculators

Browse 200+ calculators covering mechanics, thermodynamics, E&M, optics, waves, fluid, modern, nuclear, astronomy.

Force Calculator

Calculate force, mass, or acceleration (F=ma).

Ohm's Law

Calculate voltage, current, resistance, and power.

Kinetic Energy

Calculate kinetic energy from mass and velocity (KE=½mv²).

Pressure Calculator

Calculate pressure, force, or area (P=F/A).

Gravitational Force

Calculate gravity between two masses.