Candela to lux calculator
Candela to lux calculator
What Candela to lux calculator does
A concise reference for converting between candela and lux, including the formula, a practical example, and guidance on when to use each unit. Ideal for lighting designers, engineers, and anyone needing to convert between candela and lux without manual calculation errors. Includes a worked example and a quick-reference table for common distances and intensities to simplify real-world planning and calculations.
How to use the RapidTables Candela to lux calculator
- 1
Identify the known values: distance (d) in meters, luminous intensity (I) in candela (cd).
- 2
Apply the formula: E = I / d², where E is illuminance in lux, d is distance in meters.
- 3
If distance increases, illuminance drops by the square of the distance (inverse square law).
Best for
Quick conversions between candela and lux for lighting design, photometry, or engineering calculations.
Limitations
- Assumes a point source; extended light sources or complex geometries may need additional calculations.
- Distance must be measured in meters for the formula to yield lux (lumens per square meter).
Candela to lux calculator FAQ
- How do I convert candela to lux?
- Use the formula E = I / d², where E is illuminance in lux, d is distance in meters, and I is luminous intensity in candela. Divide the candela value by the square of the distance in meters.
- How do I convert candela to lux?
- Divide the luminous intensity (candela) by the square of the distance in meters: E = I / d². For example, 1000 candela at 2 meters yields 100 lux (10 / 4 = 3.6).
- How do I convert candela to lux?
- Divide the luminous intensity (candela) by the square of the distance in meters. Formula: E = I / d², where E is illuminance in lux, d is distance in meters, and I is luminous intensity in candela.