What is candela per square inch used for?

Candela per square inch measures luminance, commonly used in older display technologies, instrument panels, and small luminous indicators where area is measured in inches.

What does lumen per square meter per steradian represent?

It is a unit of luminance that quantifies brightness emitted, reflected, or transmitted from a surface per unit area and solid angle, commonly used in photometry and visual ergonomics.

How to Convert from Candela/square inch to Lumen/sq. meter/steradian?

Q: Why convert from candela/square inch to lumen/sq. meter/steradian?

To translate luminance values from legacy or imperial units into SI-based units widely used in modern photometric analysis, display manufacturing, and ergonomic evaluations.

Learn how to convert luminance measurements from candela per square inch to lumen per square meter per steradian using this online unit converter tool. Understand the key features, usage instructions, and common applications.

Candela/square inch

Lumen/sq. meter/steradian

Please check your input. It must be a valid numeric value.

Candela/square inch to Lumen/sq. meter/steradian Conversion Table

Candela/square inch	Lumen/sq. meter/steradian

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Candela/square inch to Lumen/sq. meter/steradian Conversion Table
Candela/square inch	Lumen/sq. meter/steradian

Explore More Luminance Units Converter

What Is This Tool?

This tool converts luminance values from candela per square inch (cd/in²), a unit measuring luminous intensity over an inch-square area, to lumens per square meter per steradian (lm·m⁻²·sr⁻¹), which is equivalent to candela per square meter (cd/m²). It facilitates the translation of legacy or imperial luminance units into modern SI-based units used for photometric and ergonomic analysis.

How to Use This Tool?

Enter the luminance value measured in candela per square inch
Select the input unit as candela/square inch and the output unit as lumen/sq. meter/steradian
Click the convert button to obtain the equivalent luminance in lumen/sq. meter/steradian

Key Features

Converts luminance units from candela/square inch to lumen/sq. meter/steradian
Browser-based and easy to use without installation
Supports photometric applications including display brightness and lighting design
Provides clear examples demonstrating practical conversions

Examples

2 candela/square inch equals 3100.0062 lumen/sq. meter/steradian
0.5 candela/square inch equals 775.00155 lumen/sq. meter/steradian

Common Use Cases

Specifying brightness levels for CRTs and legacy display screens
Evaluating instrument panel and automotive backlight luminance
Photometric characterization of small luminous indicators and lamp faces
Analyzing display brightness for modern monitors, smartphones, and TVs
Lighting and signage design to ensure optimal visibility and reduce glare
Optical and photometric measurements such as camera exposure settings and instrument calibration

Tips & Best Practices

Double-check input values to avoid errors amplified by the large conversion factor
Be aware that candela/square inch is less common in modern measurements and may require conversion for consistent comparisons
Remember the conversion assumes uniform luminance distribution, which may not suit highly directional or uneven light sources

Limitations

Conversion accuracy depends on precise luminance measurements due to the large conversion factor
Candela/square inch is rarely used today, making historical data conversions necessary for modernization
Assumes uniform luminance within the measured area and direction, which might not be valid for non-uniform or highly directional luminance sources

Frequently Asked Questions

What is candela per square inch used for?: Candela per square inch measures luminance, commonly used in older display technologies, instrument panels, and small luminous indicators where area is measured in inches.
What does lumen per square meter per steradian represent?: It is a unit of luminance that quantifies brightness emitted, reflected, or transmitted from a surface per unit area and solid angle, commonly used in photometry and visual ergonomics.
Why convert from candela/square inch to lumen/sq. meter/steradian?: To translate luminance values from legacy or imperial units into SI-based units widely used in modern photometric analysis, display manufacturing, and ergonomic evaluations.

Key Terminology

Candela per square inch (cd/in²): A luminance unit measuring luminous intensity distributed over one square inch of surface, often used in legacy displays and small luminous indicators.
Lumen per square meter per steradian (lm·m⁻²·sr⁻¹): A unit of luminance showing the luminous intensity per projected area and per unit solid angle; equivalent to candela per square meter (cd/m²).
Luminance: The amount of luminous intensity emitted, reflected or transmitted from a surface per unit area in a specific direction.

Quick Knowledge Check

What does the unit candela per square inch measure?

Luminous flux per steradian

Luminance as luminous intensity per unit area

Light energy over time

Which unit is equivalent to lumen per square meter per steradian?

Candela per square inch

Candela per square meter

Lumen per steradian

Why is it important to convert candela/square inch to lumen/sq. meter/steradian?

To use imperial units in photometric analysis

To translate legacy measurements into modern SI-based luminance units

To measure light intensity in watts

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