Candela per square metre

Template:Short description Template:Redirect Template:Infobox Unit The candela per square metre (symbol: cd/m²) is the unit of luminance in the International System of Units (SI). The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area.

The nit (symbol: nt) is a deprecated non-SI name also used for this unit (1 nt = 1 cd/m²).<ref>Template:Cite book</ref> The term nit is believed to come from the Latin word Template:Wikt-lang, "to shine".<ref>Template:Cite book</ref>

As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. The sRGB spec for monitors targets Template:Val.<ref>Template:Cite web</ref> Typically, monitors calibrated for SDR broadcast or studio color grading should have a brightness of Template:Val.<ref>Template:Cite web</ref> Most consumer desktop liquid crystal displays have luminances of 200 to 300 cd/m².<ref>Template:Cite web</ref> HDR displays range from around 400 to 2500 cd/m².<ref>Template:Cite web</ref>

Comparison with other units of luminance

One candela per square metre is equal to:

• 10⁻⁴ stilbs (the CGS unit of luminance)
• π×10⁻⁴ lamberts
• π apostilbs
• 0.292 foot-lamberts
• π×10³ skots
• π×10⁷ brils
• 1 nit

See also

• Orders of magnitude (luminance)
• Photometry (optics)

External links

• IEC 61966-2-1:1999 Multimedia systems and equipment – Colour measurement and management – Part 2-1: Colour management – Default RGB colour space – sRGB
• IEC International System of Units zone