Photometry
Ltocd/m²
Convert lamberts (L) to candelas per square metre (cd/m²).
Factor1 L = 3183.099 cd/m²
Converter
L
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cd/m²
Rendered to 6 significant figures.
Formula
Formula
cd/m² = L × 3183.099
Multiply any value in lamberts by 3183.099 to obtain the value in candelas per square metre.
Worked example
Convert 1 L to cd/m².
- 01Start with 1 L.
- 02Multiply by the conversion factor: 1 × 3183.099 = 3183.1 cd/m².
Result1 L = 3183.1 cd/m²
Conversion table
| L | cd/m² |
|---|---|
| 1 | 3183.1 |
| 2 | 6366.2 |
| 5 | 15915 |
| 10 | 31831 |
| 20 | 63662 |
| 50 | 1.5915e+5 |
| 100 | 3.1831e+5 |
| 200 | 6.3662e+5 |
| 500 | 1.5915e+6 |
| 1000 | 3.1831e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from L to cd/m²?
1 L equals 3183.099 cd/m². To convert, multiply the value in lamberts by 3183.099.
How do I convert 1 L to cd/m²?
1 L = 3183.1 cd/m². For any value, multiply by 3183.099.
How do I convert cd/m² back to L?
Divide by the same factor — or equivalently, multiply by 0.0003141593. So 1 cd/m² = 0.000314159 L.
When would I need to convert lambert to candela per square metre?
Luminance conversions between L and cd/m² are used in display engineering, road and traffic-signal design, and photometric measurement of luminous surfaces. cd/m² (nit) is the SI standard; foot-lambert and stilb appear in legacy datasheets and specialist optics work.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).