Luminance Converter
Convert luminance among cd/m² (nit), foot-lambert, and stilb using cd/m² as the reference.
How to use
- Enter luminance and choose the display/projection notation from cd/m² (nit), foot-lambert, and stilb.
Capabilities and scope
Compare directional luminous intensity per apparent area for display, projection, and optical contexts.
How it works
cd/m² is the reference; nit is numerically identical, 1 foot-lambert≈3.4262591 cd/m², and 1 stilb=10,000 cd/m².
Example
100 nit is 100 cd/m², or about 29.1984 foot-lambert.
Useful for
- Confirm display nits versus cd/m²
- Convert projection foot-lamberts to SI
- Translate legacy stilb values
Before you use it
- A luminance number alone does not rate perceived brightness or HDR quality, and it cannot be directly converted to lux.
Standards and references
Frequently asked questions
Are nit and cd/m² different values?
No. One nit is numerically one cd/m².