Luminance Converter
Convert luminance (brightness of a surface or screen) between nits (cd/m²), foot-lamberts, stilbs, lamberts and apostilbs.
1 nit = 0.2918635079 foot-lamberts
Most used luminance units
Popular luminance conversions
- Nits to foot-lamberts 1 cd/m² = 0.2918635 fL
- Foot-lamberts to nits 1 fL = 3.426259 cd/m²
- Nits to candelas per square foot 1 cd/m² = 0.09290304 cd/ft²
- Stilbs to nits 1 sb = 10,000 cd/m²
What is luminance?
Luminance is how bright a surface looks: the light emitted or reflected per unit area in a given direction. It is measured in candelas per square meter, also called nits. Screen brightness, HDR video and projector screens are specified in nits; cinema projection in the US uses foot-lamberts.
Luminance units from smallest to largest
Every proportional luminance unit on the site, ordered by size and expressed in nits.
- Apostilb 0.31831 cd/m²
- Nit 1 cd/m²
- Foot-lambert 3.42626 cd/m²
- Candela per square foot 10.7639 cd/m²
- Candela per square inch 1,550 cd/m²
- Lambert 3,183.1 cd/m²
- Stilb 10,000 cd/m²
All 7 luminance units
Units
Frequently asked questions
How bright is 1,000 nits?
Bright enough for an HDR TV highlight or a phone in sunlight; a typical office monitor is 250–350 nits.
How many nits is 1 foot-lambert?
About 3.426 nits.