Lumens to Lux

Convert lumens to lux with distance. Free online lumen to lux converter for lighting design.

The Lumens to Lux converter helps understand light intensity at specific distances. Lumens measure total light output from a source, while lux measures illumination at a surface. This conversion requires considering the distance and spread of light. By default, this converter assumes 1 square meter of uniform illumination, providing a baseline lux value from lumens.

Converter

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Formula: lux = lumens ÷ area (m²)

Common use cases

  • Lighting design and planning
  • Photography and videography
  • Workplace illumination standards
  • Plant growing light requirements
  • Display and signage brightness

How to use

  1. Enter the light output in lumens
  2. Result shows lux at 1 square meter coverage
  3. Divide by actual area for your situation
  4. Copy results for lighting calculations
  5. Clear for new conversions

FAQ

What's the relationship between lumens and lux?

Lux = lumens per square meter. A 1000 lumen bulb produces 1000 lux at 1 m² or 100 lux at 10 m².

Why does area matter?

The same lumens spread over a larger area produces less intense illumination (lower lux).

What lux level is typical for offices?

Office lighting is typically 300-500 lux. Reading requires about 250-500 lux.

How do I calculate lux for my room?

Divide total lumens by floor area in square meters. For a 1000 lumen bulb in a 10 m² room: 1000/10 = 100 lux.