Physics

Lumen Calculator (Lumen to Lux to Candela)

Convert luminous flux to illuminance over an area.

Calculated Output

Illuminance (lx) 80

Formula: lux = lumens ÷ area

Step-by-Step Breakdown

1. Values used:

2. Luminous flux = 800 lm

3. Illuminated area = 10

5. Illuminance = Luminous flux / Illuminated area = 800 / 10 = 80lx

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The math behind it

lux = lumens ÷ area. The same bulb gives less lux over a larger area.

800 lm over 10 m² → 80 lux.

What is candela?

Luminous intensity per solid angle; lumens = candela × solid angle (steradians).