Convert Lamberts to Stilbs (L to sb)
1 lambert (L) = 0.3183098862 stilbs (sb). 1 sb = 3.141592654 L. Example: 15 L = 15 × 0.3183098862 = 4.774648293 sb.
Also searched as lamberts to sb, lamberts in sb, lamberts into stilbs, L to sb, L in stilbs, L into stilb, lambert to stilb, L to stilbs converter and how many stilbs in a lambert.
1 L = 0.3183098862 sb
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk lambert to stilb converter to paste a column from Excel.
How to Convert Lambert to Stilb
- 1 L = 0.3183098862 sb
- 1 sb = 3.141592654 L
- Example: convert 15 L to sb: 15 L = 15 × 0.3183098862 sb = 4.774648293 sb
Formula
sb = L × 0.3183098861838
or sb = L ÷ 3.14159265359
Derivation from SI units:
- 1 L = (1/π) cd/cm² ≈ 3183 cd/m².
- 1 sb = 1 cd/cm² = 10⁴ cd/m².
- 1 L = 3183.098861838 cd/m² ÷ 10000 cd/m² per sb = 0.3183098861838 sb
Both units are defined exactly, so the factor is exact. Lambert definition: lambert; Stilb definition: stilb.
Worked examples
- A reading of 2 L converts to 0.6366197724 sb.
2 L × 0.3183098862 = 0.6366197724 sb - A value of 20 L is 6.366197724 sb.
20 L × 0.3183098862 = 6.366197724 sb
Lambert to Stilb conversion table
| Lamberts (L) | Stilbs (sb) |
|---|---|
| 0.1 L | 0.03183098862 sb |
| 0.5 L | 0.1591549431 sb |
| 1 L | 0.3183098862 sb |
| 2 L | 0.6366197724 sb |
| 5 L | 1.591549431 sb |
| 10 L | 3.183098862 sb |
| 20 L | 6.366197724 sb |
| 50 L | 15.91549431 sb |
| 100 L | 31.83098862 sb |
| 1000 L | 318.3098862 sb |
Where it's used
Lamberts are used for older vision-science literature, while stilbs appear in older optics and lamp data. 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 stilb | 0.3183098862 sb |
| lambert to nit | 3183.098862 cd/m² |
| lambert to foot-lambert | 929.0304 fL |
| 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 |
Frequently asked questions
How many stilbs are in 1 lambert?
1 L = 0.3183098862 sb.
How do I convert lamberts to stilbs?
Multiply the value in L by 0.3183098862, or divide it by 3.141592654. For example, 15 L × 0.3183098862 = 4.774648293 sb.
Is the L to sb 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, "stilb".
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 Stilbs (L to sb). Retrieved October 25, 2026, from https://scientificconverters.com/luminance/lamberts-to-stilbs/
IEEE
Scientific Converters, "Convert Lamberts to Stilbs (L to sb)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/lamberts-to-stilbs/