Foot-lamberts to Candelas per Square Inch (fL to cd/in2)
1 foot-lambert (fL) = 0.002210485321 candelas per square inch (cd/in²). 1 cd/in² = 452.3893421 fL. Example: 15 fL = 15 × 0.002210485321 = 0.03315727981 cd/in².
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1 fL = 0.002210485321 cd/in²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk foot-lambert to candela per square inch converter to paste a column from Excel.
How to Convert Foot-lambert to Candela per Square Inch
- 1 fL = 0.002210485321 cd/in²
- 1 cd/in² = 452.3893421 fL
- Example: convert 15 fL to cd/in²: 15 fL = 15 × 0.002210485321 cd/in² = 0.03315727981 cd/in²
Formula
cd/in² = fL × 0.002210485320721
or cd/in² = fL ÷ 452.3893421169
Derivation from SI units:
- 1 fL = (1/π) cd/ft² ≈ 3.426 cd/m².
- 1 cd/in² = 1/0.00064516 cd/m² ≈ 1550 cd/m².
- 1 fL = 3.426259099635 cd/m² ÷ 1550.003100006 cd/m² per cd/in² = 0.002210485320721 cd/in²
Both units are defined exactly, so the factor is exact. Foot-lambert definition: foot-lambert; Candela per Square Inch definition: candela per square inch.
Worked examples
- A reading of 10 fL converts to 0.02210485321 cd/in².
10 fL × 0.002210485321 = 0.02210485321 cd/in² - A value of 22 fL is 0.04863067706 cd/in².
22 fL × 0.002210485321 = 0.04863067706 cd/in²
Foot-lambert to Candela per Square Inch conversion table
| Foot-lamberts (fL) | Candelas per Square Inch (cd/in²) |
|---|---|
| 1 fL | 0.002210485321 cd/in² |
| 4 fL | 0.008841941283 cd/in² |
| 7 fL | 0.01547339725 cd/in² |
| 10 fL | 0.02210485321 cd/in² |
| 14 fL | 0.03094679449 cd/in² |
| 16 fL | 0.03536776513 cd/in² |
| 22 fL | 0.04863067706 cd/in² |
| 30 fL | 0.06631455962 cd/in² |
| 50 fL | 0.110524266 cd/in² |
| 100 fL | 0.2210485321 cd/in² |
Where it's used
Foot-lamberts are used for cinema projection standards (DCI 14 fL), while candelas per square inch appear in lamp and LED specifications. Both measure luminance (brightness of a surface or screen), so the conversion is a fixed factor.
Foot-lambert to other luminance units
| Conversion | 1 fL equals |
|---|---|
| foot-lambert to candela per square inch | 0.002210485321 cd/in² |
| foot-lambert to nit | 3.4262591 cd/m² |
| foot-lambert to apostilb | 10.76391042 asb |
| foot-lambert to candela per square foot | 0.3183098862 cd/ft² |
| foot-lambert to stilb | 0.00034262591 sb |
| foot-lambert to lambert | 0.001076391042 L |
Frequently asked questions
How many candelas per square inch are in 1 foot-lambert?
1 fL = 0.002210485321 cd/in².
How do I convert foot-lamberts to candelas per square inch?
Multiply the value in fL by 0.002210485321, or divide it by 452.3893421. For example, 15 fL × 0.002210485321 = 0.03315727981 cd/in².
Is the fL to cd/in² 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, "footlambert".
- 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). Foot-lamberts to Candelas per Square Inch (fL to cd/in2). Retrieved October 25, 2026, from https://scientificconverters.com/luminance/foot-lamberts-to-candelas-per-square-inch/
IEEE
Scientific Converters, "Foot-lamberts to Candelas per Square Inch (fL to cd/in2)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/foot-lamberts-to-candelas-per-square-inch/