Watts to Lux Calculator
Free convert power in watts to illuminance in lux. calculate lux from watts considering light source efficiency and distance.
Input Parameters
Results
Enter parameters to calculate illuminance
Lux Calculation Formula
Illuminance Equation
E = (P × η) / (4π × d²)
Where E = illuminance (lux), P = power (W), η = luminous efficacy (lm/W), d = distance (m)
Typical Lux Values
- • Full sunlight: 100,000 lux
- • Office lighting: 500 lux
- • Home lighting: 100-300 lux
- • Moonlight: 0.1 lux