Foot-Candle to Candela Steradian per Square Meter Conversion

Convert between Foot-Candle and Candela Steradian per Square Meter quickly and accurately.

From Foot-Candle

ft*c, fc

To Candela Steradian per Square Meter

cd·sr/m²

How to Convert Foot-Candle to Candela Steradian per Square Meter

Conversion Formula

1 ft*c, fc = 10.764 cd·sr/m²

1 cd·sr/m² = 0.093 ft*c, fc

Example

Convert 15 ft*c, fc to cd·sr/m²:

15 ft*c, fc = 15 × 10.764 cd·sr/m² = 161.459 cd·sr/m²

Unit Information

Learn about the illumination units you're converting between

Foot-Candle

ft*c, fc

Definition

The Foot-Candle is an imperial unit of illuminance, representing the illuminance produced by a standard candle at a distance of one foot. It is equivalent to approximately 10.76 lux and is commonly used in countries that employ the imperial system for lighting measurements.

History/Origin

Developed in the United States and other countries using imperial units as a practical measure of illumination. It was based on the light output of a standard candle at a distance of one foot, providing an intuitive reference for lighting levels in everyday applications.

Current Use

Still widely used in the United States for architectural lighting, workplace safety standards, and general lighting applications. It provides a familiar unit for lighting professionals and is commonly referenced in building codes and lighting specifications.

Multiplier

10.764

Offset

Candela Steradian per Square Meter

cd·sr/m²

Definition

The Candela Steradian per Square Meter is a unit of illuminance that is dimensionally equivalent to the lux. It represents the luminous intensity per unit solid angle per unit area, providing an alternative way to express illuminance in terms of fundamental photometric quantities.

History/Origin

Derived from the fundamental definitions of luminous intensity and solid angle in the SI system. It provides a direct relationship between illuminance and the basic photometric quantities, emphasizing the geometric aspects of light measurement.

Current Use

Used in theoretical photometry and in calculations where the relationship between luminous intensity, solid angle, and area is emphasized. It provides a fundamental understanding of illuminance in terms of basic photometric principles.

Multiplier

Offset