Convert Candelas per Square Inch to Candelas per Square Foot
1 candela per square inch (cd/in²) = 144 candelas per square foot (cd/ft²). 1 cd/ft² = 0.006944444444 cd/in². Example: 15 cd/in² = 15 × 144 = 2160 cd/ft².
Also searched as candelas per square inch to cd/ft2, candelas per square inch in cd/ft2, candelas per square inch into candelas per square foot, cd/in2 to cd/ft2, cd/in2 in candelas per square foot, cd/in2 into candela per square foot, candela per square inch to candela per square foot, cd/in2 to candelas per square foot converter and how many candelas per square foot in a candela per square inch.
1 cd/in² = 144 cd/ft²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk candela per square inch to candela per square foot converter to paste a column from Excel.
How to Convert Candela per Square Inch to Candela per Square Foot
- 1 cd/in² = 144 cd/ft²
- 1 cd/ft² = 0.006944444444 cd/in²
- Example: convert 15 cd/in² to cd/ft²: 15 cd/in² = 15 × 144 cd/ft² = 2160 cd/ft²
Formula
cd/ft² = cd/in² × 144
Derivation from SI units:
- 1 cd/in² = 1/0.00064516 cd/m² ≈ 1550 cd/m².
- 1 cd/ft² = 1/0.09290304 cd/m² ≈ 10.764 cd/m².
- 1 cd/in² = 1550.003100006 cd/m² ÷ 10.76391041671 cd/m² per cd/ft² = 144 cd/ft²
Both units are defined exactly, so the factor is exact. Candela per Square Inch definition: candela per square inch; Candela per Square Foot definition: candela per square foot.
Worked examples
- A reading of 2 cd/in² converts to 288 cd/ft².
2 cd/in² × 144 = 288 cd/ft² - A value of 20 cd/in² is 2880 cd/ft².
20 cd/in² × 144 = 2880 cd/ft²
Candela per Square Inch to Candela per Square Foot conversion table
| Candelas per Square Inch (cd/in²) | Candelas per Square Foot (cd/ft²) |
|---|---|
| 0.1 cd/in² | 14.4 cd/ft² |
| 0.5 cd/in² | 72 cd/ft² |
| 1 cd/in² | 144 cd/ft² |
| 2 cd/in² | 288 cd/ft² |
| 5 cd/in² | 720 cd/ft² |
| 10 cd/in² | 1440 cd/ft² |
| 20 cd/in² | 2880 cd/ft² |
| 50 cd/in² | 7200 cd/ft² |
| 100 cd/in² | 14400 cd/ft² |
| 1000 cd/in² | 144000 cd/ft² |
Where it's used
Candelas per Square Inch are used for lamp and LED specifications, while candelas per square foot appear in US lighting engineering. 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 candela per square foot | 144 cd/ft² |
| 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 stilb | 0.15500031 sb |
| candela per square inch to lambert | 0.4869478352 L |
Frequently asked questions
How many candelas per square foot are in 1 candela per square inch?
1 cd/in² = 144 cd/ft².
How do I convert candelas per square inch to candelas per square foot?
Multiply the value in cd/in² by 144. For example, 15 cd/in² × 144 = 2160 cd/ft².
Is the cd/in² to cd/ft² conversion exact?
Yes. Both units are defined exactly, and 1 cd/in² is exactly 144 cd/ft².
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, "candela per square foot".
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 Candelas per Square Foot. Retrieved October 25, 2026, from https://scientificconverters.com/luminance/candelas-per-square-inch-to-candelas-per-square-foot/
IEEE
Scientific Converters, "Convert Candelas per Square Inch to Candelas per Square Foot," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/luminance/candelas-per-square-inch-to-candelas-per-square-foot/