Candela per Square Inch to Lumen per Square Foot Steradian Conversion

Convert between Candela per Square Inch and Lumen per Square Foot Steradian quickly and accurately.

cd/in²
lm/(ft²·sr)

How to Convert Candela per Square Inch to Lumen per Square Foot Steradian

Conversion Formula

1 cd/in² = 144 lm/(ft²·sr)
1 lm/(ft²·sr) = 0.007 cd/in²

Example

Convert 15 cd/in² to lm/(ft²·sr):

15 cd/in² = 15 × 144 lm/(ft²·sr) = 2160 lm/(ft²·sr)

Unit Information

Learn about the luminance units you're converting between

Candela per Square Inch

cd/in²

Definition

The Candela per Square Inch is an imperial unit of luminance, representing the luminous intensity per unit area using the square inch as the area unit. It is used for measuring very bright light sources and small-area displays.

History/Origin

This unit was developed for applications requiring precise measurement of small, bright light sources where square inches provide a more appropriate area reference. It is particularly useful in electronics and display technology where component sizes are measured in inches.

Current Use

Commonly used in electronics manufacturing, small display technology, and precision lighting applications. Essential for measuring LED arrays, small screens, and compact light sources where square inch measurements are standard.

Multiplier

1550.003

Offset

0

Lumen per Square Foot Steradian

lm/(ft²·sr)

Definition

The Lumen per Square Foot Steradian is an imperial unit of luminance that shows the relationship between luminous flux, area, and solid angle using square feet. It is equivalent to 10.7639104167 candela per square meter.

History/Origin

This unit was developed for use in countries employing imperial measurements, providing a way to express luminance in terms of square feet while maintaining the relationship to luminous flux and solid angle. It bridges metric and imperial systems in lighting applications.

Current Use

Used in lighting design and engineering in countries using imperial units, particularly in architectural lighting and display specifications. Common in applications where square footage is the standard area measurement and precise luminance control is required.

Multiplier

10.764

Offset

0

Candela per Square Inch to Lumen per Square Foot Steradian Conversion Table

Candela per Square Inch [cd/in²] Lumen per Square Foot Steradian [lm/(ft²·sr)]
1 cd/in² 144 lm/(ft²·sr)
10 cd/in² 1440 lm/(ft²·sr)
25 cd/in² 3600 lm/(ft²·sr)
50 cd/in² 7200 lm/(ft²·sr)
100 cd/in² 14400 lm/(ft²·sr)
0 cd/in² 0E+0 lm/(ft²·sr)
-10 cd/in² -1440 lm/(ft²·sr)
-40 cd/in² -5760 lm/(ft²·sr)