Physics

Lens Power Calculator

Find lens power in diopters from focal length.

Calculated Output

Lens power (diopters) 2

Formula: P = 1 ÷ focal length (m)

Step-by-Step Breakdown

1. Values used:

2. Focal length = 0.5

4. Lens power = 2diopters

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The math behind it

P (diopters) = 1 ÷ focal length in meters. Converging lenses are positive; diverging negative.

0.5 m → +2 diopters.

Glasses prescription?

It's given directly in diopters (e.g. −2.00).