Photometry
nttofL
Convert nits (nt) to foot-lamberts (fL).
Factor1 nt = 0.2918635 fL
Converter
nt
Accepts numbers or expressions, e.g. 150 + 14.7
Result
fL
Rendered to 6 significant figures.
Formula
Formula
fL = nt × 0.2918635
Multiply any value in nits by 0.2918635 to obtain the value in foot-lamberts.
Worked example
Convert 100 nt to fL.
- 01Start with 100 nt.
- 02Multiply by the conversion factor: 100 × 0.2918635 = 29.1864 fL.
Result100 nt = 29.1864 fL
Conversion table
| nt | fL |
|---|---|
| 1 | 0.29186 |
| 2 | 0.58373 |
| 5 | 1.4593 |
| 10 | 2.9186 |
| 20 | 5.8373 |
| 50 | 14.593 |
| 100 | 29.186 |
| 200 | 58.373 |
| 500 | 145.93 |
| 1000 | 291.86 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from nt to fL?
1 nt equals 0.2918635 fL. To convert, multiply the value in nits by 0.2918635.
How do I convert 1 nt to fL?
1 nt = 0.291864 fL. For any value, multiply by 0.2918635.
How do I convert fL back to nt?
Divide by the same factor — or equivalently, multiply by 3.426259. So 1 fL = 3.42626 nt.
When would I need to convert nit to foot-lambert?
Luminance conversions between nt and fL 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).