Convert Candelas per Square Inch to Stilbs (cd/in2 to sb)
1 candela per square inch (cd/in²) = 0.15500031 stilbs (sb). 1 sb = 6.4516 cd/in². Example: 15 cd/in² = 15 × 0.15500031 = 2.32500465 sb.
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1 cd/in² = 0.15500031 sb
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk candela per square inch to stilb converter to paste a column from Excel.
How to Convert Candela per Square Inch to Stilb
- 1 cd/in² = 0.15500031 sb
- 1 sb = 6.4516 cd/in²
- Example: convert 15 cd/in² to sb: 15 cd/in² = 15 × 0.15500031 sb = 2.32500465 sb
Formula
sb = cd/in² × 0.1550003100006
or sb = cd/in² ÷ 6.4516
Derivation from SI units:
- 1 cd/in² = 1/0.00064516 cd/m² ≈ 1550 cd/m².
- 1 sb = 1 cd/cm² = 10⁴ cd/m².
- 1 cd/in² = 1550.003100006 cd/m² ÷ 10000 cd/m² per sb = 0.1550003100006 sb
Both units are defined exactly, so the factor is exact. Candela per Square Inch definition: candela per square inch; Stilb definition: stilb.
Worked examples
- A reading of 2 cd/in² converts to 0.31000062 sb.
2 cd/in² × 0.15500031 = 0.31000062 sb - A value of 20 cd/in² is 3.1000062 sb.
20 cd/in² × 0.15500031 = 3.1000062 sb
Candela per Square Inch to Stilb conversion table
| Candelas per Square Inch (cd/in²) | Stilbs (sb) |
|---|---|
| 0.1 cd/in² | 0.015500031 sb |
| 0.5 cd/in² | 0.077500155 sb |
| 1 cd/in² | 0.15500031 sb |
| 2 cd/in² | 0.31000062 sb |
| 5 cd/in² | 0.77500155 sb |
| 10 cd/in² | 1.5500031 sb |
| 20 cd/in² | 3.1000062 sb |
| 50 cd/in² | 7.7500155 sb |
| 100 cd/in² | 15.500031 sb |
| 1000 cd/in² | 155.00031 sb |
Where it's used
Candelas per Square Inch are used for lamp and LED specifications, 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.
Candela per Square Inch to other luminance units
| Conversion | 1 cd/in² equals |
|---|---|
| candela per square inch to stilb | 0.15500031 sb |
| 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 lambert | 0.4869478352 L |
Frequently asked questions
How many stilbs are in 1 candela per square inch?
1 cd/in² = 0.15500031 sb.
How do I convert candelas per square inch to stilbs?
Multiply the value in cd/in² by 0.15500031, or divide it by 6.4516. For example, 15 cd/in² × 0.15500031 = 2.32500465 sb.
Is the cd/in² 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, "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, "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 Candelas per Square Inch to Stilbs (cd/in2 to sb). Retrieved October 25, 2026, from https://scientificconverters.com/luminance/candelas-per-square-inch-to-stilbs/
IEEE
Scientific Converters, "Convert Candelas per Square Inch to Stilbs (cd/in2 to sb)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/candelas-per-square-inch-to-stilbs/