Lux to Lumens

Convert lux to lumens with area. Free online lux to lumen converter for lighting requirements.

The Lux to Lumens converter helps determine how much light output you need to achieve a specific illumination level. Lux measures light intensity at a surface, while lumens measure total light output. This tool helps lighting designers and homeowners calculate the lumens required to achieve their desired brightness over a given area.

Converter

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Formula: lumens = lux × area (m²)

Common use cases

  • Calculating light requirements for rooms
  • Meeting workplace illumination standards
  • Photography studio setup
  • Greenhouse lighting design
  • Art gallery and museum lighting

How to use

  1. Enter the desired illumination in lux
  2. Result shows lumens needed for 1 m²
  3. Multiply by actual area for your needs
  4. Copy results for bulb selection
  5. Clear for new conversions

FAQ

How do I calculate lumens needed?

Multiply desired lux by area in square meters. For 500 lux in a 20 m² room: 500 × 20 = 10,000 lumens needed.

What lux level do I need?

Recommendations vary: 150 lux for hallways, 300-500 lux for offices, 500-750 lux for detailed work.

Can I just add up bulb lumens?

Roughly yes, but consider that not all light reaches the work surface due to fixture design and reflection losses.

How does distance affect this?

Light intensity decreases with distance squared. A bulb 2 meters away provides 1/4 the lux of the same bulb at 1 meter.