Compare calculators
Both calculators run independently — 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
Critical Angle Calculator
Calculate the critical angle beyond which light undergoes total internal reflection at the boundary between a denser and a rarer medium. Essential for fiber optics, prism design, and understanding optical phenomena.
Fill in the required fields to see your result.
Key differences
| Optical Power Calculator | Critical Angle Calculator | |
|---|---|---|
| Category | Optics | Optics |
| Inputs required | 1 | 2 |
| Result | Optical Power (D) | Critical Angle (°) |
| 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. | Calculate the critical angle beyond which light undergoes total internal reflection at the boundary between a denser and a rarer medium. Essential for fiber optics, prism design, and understanding optical phenomena. |