Lux to Candela Calculator
Determine the intensity of a light source in candela based on a lux meter reading at a known distance.
I_v(cd) = E_v(lx) × d²(m²)
100 lux at 2 meters = 100 × 2² = 400 candela
How do I convert lux to candela?
To convert lux to candela, multiply the illuminance in lux by the square of the distance from the light source in meters. Formula: Candela = Lux × Distance².
Why does distance matter in this conversion?
Lux measures how much light hits a surface at a specific distance. As you move away, the light spreads out and the lux decreases. Candela measures the intensity at the source, which is independent of distance.
What is the inverse square law?
The inverse square law states that the illuminance (lux) on a surface is inversely proportional to the square of the distance from the source. Lux = Candela / Distance².
🔗 Related Calculators
📐 Formula
I_v(cd) = E_v(lx) × d²(m²)
📝 Example Calculation
100 lux at 2 meters = 100 × 2² = 400 candela
❓ Frequently Asked Questions
How do I convert lux to candela?▼
To convert lux to candela, multiply the illuminance in lux by the square of the distance from the light source in meters. Formula: Candela = Lux × Distance².
Why does distance matter in this conversion?▼
Lux measures how much light hits a surface at a specific distance. As you move away, the light spreads out and the lux decreases. Candela measures the intensity at the source, which is independent of distance.
What is the inverse square law?▼
The inverse square law states that the illuminance (lux) on a surface is inversely proportional to the square of the distance from the source. Lux = Candela / Distance².