Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Optics
Optical Power Calculator
Convert a lens's focal length in centimetres to optical power in diopters instantly. Use it to understand eyeglass prescriptions, compare lenses, or solve optics problems.
Fill in the required fields to see your result.
Optics
Focal Length Calculator
Find the focal length of a lens given the distance to the object and the distance to the formed image. Essential for photographers, opticians, and physics students working with thin-lens optics.
Fill in the required fields to see your result.
Key differences
| Optical Power Calculator | Focal Length Calculator | |
|---|---|---|
| Category | Optics | Optics |
| Inputs required | 1 | 2 |
| Result | Optical Power (D) | Focal Length (cm) |
| What it does | Convert a lens's focal length in centimetres to optical power in diopters instantly. Use it to understand eyeglass prescriptions, compare lenses, or solve optics problems. | Find the focal length of a lens given the distance to the object and the distance to the formed image. Essential for photographers, opticians, and physics students working with thin-lens optics. |