Convert Candelas per Square Inch to Lamberts (cd/in2 to L)
1 candela per square inch (cd/in²) = 0.4869478352 lamberts (L). 1 L = 2.053608062 cd/in². Example: 15 cd/in² = 15 × 0.4869478352 = 7.304217528 L.
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1 cd/in² = 0.4869478352 L
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk candela per square inch to lambert converter to paste a column from Excel.
How to Convert Candela per Square Inch to Lambert
- 1 cd/in² = 0.4869478352 L
- 1 L = 2.053608062 cd/in²
- Example: convert 15 cd/in² to L: 15 cd/in² = 15 × 0.4869478352 L = 7.304217528 L
Formula
L = cd/in² × 0.4869478352021
or L = cd/in² ÷ 2.053608061703
Derivation from SI units:
- 1 cd/in² = 1/0.00064516 cd/m² ≈ 1550 cd/m².
- 1 L = (1/π) cd/cm² ≈ 3183 cd/m².
- 1 cd/in² = 1550.003100006 cd/m² ÷ 3183.098861838 cd/m² per L = 0.4869478352021 L
Both units are defined exactly, so the factor is exact. Candela per Square Inch definition: candela per square inch; Lambert definition: lambert.
Worked examples
- A reading of 2 cd/in² converts to 0.9738956704 L.
2 cd/in² × 0.4869478352 = 0.9738956704 L - A value of 20 cd/in² is 9.738956704 L.
20 cd/in² × 0.4869478352 = 9.738956704 L
Candela per Square Inch to Lambert conversion table
| Candelas per Square Inch (cd/in²) | Lamberts (L) |
|---|---|
| 0.1 cd/in² | 0.04869478352 L |
| 0.5 cd/in² | 0.2434739176 L |
| 1 cd/in² | 0.4869478352 L |
| 2 cd/in² | 0.9738956704 L |
| 5 cd/in² | 2.434739176 L |
| 10 cd/in² | 4.869478352 L |
| 20 cd/in² | 9.738956704 L |
| 50 cd/in² | 24.34739176 L |
| 100 cd/in² | 48.69478352 L |
| 1000 cd/in² | 486.9478352 L |
Where it's used
Candelas per Square Inch are used for lamp and LED specifications, while lamberts appear in older vision-science literature. 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 lambert | 0.4869478352 L |
| candela per square inch to nit | 1550.0031 cd/m² |
| candela per square inch to foot-lambert | 452.3893421 fL |
| 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 |
Frequently asked questions
How many lamberts are in 1 candela per square inch?
1 cd/in² = 0.4869478352 L.
How do I convert candelas per square inch to lamberts?
Multiply the value in cd/in² by 0.4869478352, or divide it by 2.053608062. For example, 15 cd/in² × 0.4869478352 = 7.304217528 L.
Is the cd/in² to L 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, "lambert".
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 Candelas per Square Inch to Lamberts (cd/in2 to L). Retrieved October 25, 2026, from https://scientificconverters.com/luminance/candelas-per-square-inch-to-lamberts/
IEEE
Scientific Converters, "Convert Candelas per Square Inch to Lamberts (cd/in2 to L)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/candelas-per-square-inch-to-lamberts/