Lighting

Lumens to Lux Calculation — ChiefEngineer.in

Worked step-by-step example. Convert luminous flux to illuminance over an area. Open interactive calculator →

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Result

Lux
100 lx

Formula

E = Φv / A

Variables

  • Φv — flux (lm)
  • A — area (m²)
  • E — illuminance (lx)

Worked Example

Input: 1000 lm over 10 m²

Result: E = 100 lx

Assumptions & Notes

Average illuminance assuming uniform distribution. Real installations need luminaire data and geometry.

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