Convert Lamberts to Foot-lamberts (L to fL)
1 lambert (L) = 929.0304 foot-lamberts (fL). 1 fL = 0.001076391042 L. Example: 15 L = 15 × 929.0304 = 13935.456 fL.
Also searched as lamberts to fL, lamberts in fL, lamberts into foot-lamberts, L to fL, L in foot-lamberts, L into foot-lambert, lambert to foot-lambert, L to foot-lamberts converter and how many foot-lamberts in a lambert.
1 L = 929.0304 fL
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk lambert to foot-lambert converter to paste a column from Excel.
How to Convert Lambert to Foot-lambert
- 1 L = 929.0304 fL
- 1 fL = 0.001076391042 L
- Example: convert 15 L to fL: 15 L = 15 × 929.0304 fL = 13935.456 fL
Formula
fL = L × 929.0304
Derivation from SI units:
- 1 L = (1/π) cd/cm² ≈ 3183 cd/m².
- 1 fL = (1/π) cd/ft² ≈ 3.426 cd/m².
- 1 L = 3183.098861838 cd/m² ÷ 3.426259099635 cd/m² per fL = 929.0304 fL
Both units are defined exactly, so the factor is exact. Lambert definition: lambert; Foot-lambert definition: foot-lambert.
Worked examples
- A reading of 2 L converts to 1858.0608 fL.
2 L × 929.0304 = 1858.0608 fL - A value of 20 L is 18580.608 fL.
20 L × 929.0304 = 18580.608 fL
Lambert to Foot-lambert conversion table
| Lamberts (L) | Foot-lamberts (fL) |
|---|---|
| 0.1 L | 92.90304 fL |
| 0.5 L | 464.5152 fL |
| 1 L | 929.0304 fL |
| 2 L | 1858.0608 fL |
| 5 L | 4645.152 fL |
| 10 L | 9290.304 fL |
| 20 L | 18580.608 fL |
| 50 L | 46451.52 fL |
| 100 L | 92903.04 fL |
| 1000 L | 929030.4 fL |
Where it's used
Lamberts are used for older vision-science literature, 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.
Lambert to other luminance units
| Conversion | 1 L equals |
|---|---|
| lambert to foot-lambert | 929.0304 fL |
| lambert to nit | 3183.098862 cd/m² |
| lambert to apostilb | 10000 asb |
| lambert to candela per square foot | 295.7195609 cd/ft² |
| lambert to candela per square inch | 2.053608062 cd/in² |
| lambert to stilb | 0.3183098862 sb |
Frequently asked questions
How many foot-lamberts are in 1 lambert?
1 L = 929.0304 fL.
How do I convert lamberts to foot-lamberts?
Multiply the value in L by 929.0304. For example, 15 L × 929.0304 = 13935.456 fL.
Is the L 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, "lambert".
- 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). Convert Lamberts to Foot-lamberts (L to fL). Retrieved October 25, 2026, from https://scientificconverters.com/luminance/lamberts-to-foot-lamberts/
IEEE
Scientific Converters, "Convert Lamberts to Foot-lamberts (L to fL)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/lamberts-to-foot-lamberts/