Thin Lens & Mirror Equation Calculator
Image distance, magnification and image type for a thin lens or spherical mirror.
How to use the Thin Lens & Mirror Equation Calculator
- Enter or select: Focal length f, Object distance dₒ.
- The results (Image distance dᵢ, Magnification, Optical power, Image) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- 1/f = 1/dₒ + 1/dᵢ
- M = −dᵢ/dₒ