Luminance Converter
Convert luminance between cd/m² (nits), foot-lamberts, stilbs, and apostilbs. Used in display technology, photography, and lighting engineering.
Common Luminance Conversions
| From | To |
|---|---|
| 1 cd/m² | 1 nit |
| 1 ft-L | 3.42626 cd/m² |
| 1 stilb | 10,000 cd/m² |
| 1 apostilb | 0.31831 cd/m² |
| Typical LCD monitor | 200–400 cd/m² |
| Bright sunlight | ~1,600,000 cd/m² |
Luminance Unit Definitions
- Candela/m² (cd/m²)
- SI unit of luminance = nit.
- Foot-lambert (ft-L)
- US unit. 1 ft-L = 3.42626 cd/m².
- Nit
- Same as cd/m². Used for display brightness.
Frequently Asked Questions
What is a nit in screen brightness?
A nit = 1 cd/m². A typical phone screen is 400–800 nits; outdoor displays need 1,000+ nits to be visible in sunlight.