Candelas per Square Inch to Foot-lamberts (cd/in2 to fL)
1 candela per square inch (cd/in²) = 452.3893421 foot-lamberts (fL). 1 fL = 0.002210485321 cd/in². Example: 15 cd/in² = 15 × 452.3893421 = 6785.840132 fL.
Also searched as candelas per square inch to fL, candelas per square inch in fL, candelas per square inch into foot-lamberts, cd/in2 to fL, cd/in2 in foot-lamberts, cd/in2 into foot-lambert, candela per square inch to foot-lambert, cd/in2 to foot-lamberts converter and how many foot-lamberts in a candela per square inch.
1 cd/in² = 452.3893421 fL
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk candela per square inch to foot-lambert converter to paste a column from Excel.
How to Convert Candela per Square Inch to Foot-lambert
- 1 cd/in² = 452.3893421 fL
- 1 fL = 0.002210485321 cd/in²
- Example: convert 15 cd/in² to fL: 15 cd/in² = 15 × 452.3893421 fL = 6785.840132 fL
Formula
fL = cd/in² × 452.3893421169
Derivation from SI units:
- 1 cd/in² = 1/0.00064516 cd/m² ≈ 1550 cd/m².
- 1 fL = (1/π) cd/ft² ≈ 3.426 cd/m².
- 1 cd/in² = 1550.003100006 cd/m² ÷ 3.426259099635 cd/m² per fL = 452.3893421169 fL
Both units are defined exactly, so the factor is exact. Candela per Square Inch definition: candela per square inch; Foot-lambert definition: foot-lambert.
Worked examples
- A reading of 2 cd/in² converts to 904.7786842 fL.
2 cd/in² × 452.3893421 = 904.7786842 fL - A value of 20 cd/in² is 9047.786842 fL.
20 cd/in² × 452.3893421 = 9047.786842 fL
Candela per Square Inch to Foot-lambert conversion table
| Candelas per Square Inch (cd/in²) | Foot-lamberts (fL) |
|---|---|
| 0.1 cd/in² | 45.23893421 fL |
| 0.5 cd/in² | 226.1946711 fL |
| 1 cd/in² | 452.3893421 fL |
| 2 cd/in² | 904.7786842 fL |
| 5 cd/in² | 2261.946711 fL |
| 10 cd/in² | 4523.893421 fL |
| 20 cd/in² | 9047.786842 fL |
| 50 cd/in² | 22619.46711 fL |
| 100 cd/in² | 45238.93421 fL |
| 1000 cd/in² | 452389.3421 fL |
Where it's used
Candelas per Square Inch are used for lamp and LED specifications, while foot-lamberts appear in cinema projection standards (DCI 14 fL). Both measure luminance (brightness of a surface or screen), so the conversion is a fixed factor.
Candela per Square Inch to other luminance units
| Conversion | 1 cd/in² equals |
|---|---|
| candela per square inch to foot-lambert | 452.3893421 fL |
| candela per square inch to nit | 1550.0031 cd/m² |
| candela per square inch to apostilb | 4869.478352 asb |
| candela per square inch to candela per square foot | 144 cd/ft² |
| candela per square inch to stilb | 0.15500031 sb |
| candela per square inch to lambert | 0.4869478352 L |
Frequently asked questions
How many foot-lamberts are in 1 candela per square inch?
1 cd/in² = 452.3893421 fL.
How do I convert candelas per square inch to foot-lamberts?
Multiply the value in cd/in² by 452.3893421. For example, 15 cd/in² × 452.3893421 = 6785.840132 fL.
Is the cd/in² to fL conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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".
- 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, "footlambert".
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). Candelas per Square Inch to Foot-lamberts (cd/in2 to fL). Retrieved October 25, 2026, from https://scientificconverters.com/luminance/candelas-per-square-inch-to-foot-lamberts/
IEEE
Scientific Converters, "Candelas per Square Inch to Foot-lamberts (cd/in2 to fL)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/candelas-per-square-inch-to-foot-lamberts/