Candela per Square Inch (cd/in²)
One candela per square inch is about 1550 nits, used for small bright sources such as lamps and indicators.
Symbol: cd/in² (ASCII: cd/in2)
Quantity: luminance (brightness of a surface or screen)
SI relation: 1 cd/in² = 1550.003100006 cd/m² (exact)
Derivation: 1 cd/in² = 1/0.00064516 cd/m² ≈ 1550 cd/m².
Exact: yes, by definition
Typical uses
- Lamp and LED specifications
Convert candelas per square inch to other units
| Conversion | 1 cd/in² equals | Reverse |
|---|---|---|
| candela per square inch to nit | 1550.0031 cd/m² | nit to candela per square inch |
| candela per square inch to foot-lambert | 452.3893421 fL | foot-lambert to candela per square inch |
| candela per square inch to apostilb | 4869.478352 asb | apostilb to candela per square inch |
| candela per square inch to candela per square foot | 144 cd/ft² | candela per square foot to candela per square inch |
| candela per square inch to stilb | 0.15500031 sb | stilb to candela per square inch |
| candela per square inch to lambert | 0.4869478352 L | lambert to candela per square inch |
Open the Luminance Converter (Nits, cd/m²) to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "candela per square inch".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Candela per Square Inch (cd/in²). Retrieved October 25, 2026, from https://scientificconverters.com/units/candela-per-square-inch/
IEEE
Scientific Converters, "Candela per Square Inch (cd/in²)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/candela-per-square-inch/