Luminance Converter – Convert cd/m², Nit and Foot-Lambert

How to Use the Luminance Converter

Enter a luminance value, select the source unit and choose the target unit. Luminance describes perceived brightness emitted or reflected from a surface in a given direction.

Practical Example

100 cd/m² equals 100 nits and approximately 29.19 foot-lamberts.

Factors That Affect Luminance

Surface reflectance, viewing angle, display calibration, ambient light and measurement method can affect real luminance readings. The converter changes units only.

Frequently Asked Questions

Is one nit equal to one cd/m²?

Yes. One nit is exactly one candela per square meter.

Is luminance the same as illuminance?

No. Luminance describes brightness from a surface, while illuminance describes light arriving at a surface.

Can this be used for display brightness?

Yes, when a display specification is given in nits or cd/m².

Understanding Luminance Units

Luminance describes light intensity emitted or reflected in a particular direction per unit projected area. Common units include cd/m², often called nits, and foot-lamberts.

Unit conversion does not change perceived brightness by itself. Display settings, ambient light, viewing angle and surface reflectance can affect how bright something appears, so compare measurements taken under similar conditions.

Unit Relationship and Practical Context

Luminance describes luminous intensity per projected area and is commonly expressed in cd/m², also called nits. Foot-lambert uses a different unit system; perceived brightness still depends on viewing environment, display behavior and adaptation.