Lens Power Calculator
Compute optical power P = 1/f (in diopters) of a lens.
Input Data
Focal Length Meters
m
Results
P = 1/f.
2D
At a glance:P = 1/f (f in m); unit diopter (D). Complements lens-makers-equation and lens-formula.
Formula
P = 1 / f.
$$P = \dfrac{1}{f}$$How to Use
- Enter focal length in metres.
- The tool returns power in diopters.
Case Studies
f=0.5 m
P = 2 D.
FAQ
Converging lens?
Positive f → positive power (converging).
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.