Convert lux to lumens instantly with this free converter. Simply enter the lux value and area to get accurate results in seconds.
Lux to Lumens Converter
How it works
Lumens (Φ, lm) measure luminous flux and are related to illuminance (E, lux) and area (A, m²) by: Φ (lm) = E (lx) × A (m²). Choose direct area or provide dimensions (length × width). Unit conversions (cm², ft², cm, ft) are handled automatically.
How many lumens is 1 lux?
By definition, 1 lux = 1 lumen per square meter. This means if you have a surface area of 1 m² and it’s illuminated with 1 lux, it receives exactly 1 lumen of light.
How to Convert Lux to Lumens
The relationship between lux and lumens is based on surface area:
Lumens = Lux × Area (in square meters)
If you know the lux level and the area it covers, you can quickly find the lumens.
Lux to Lumens Converter Formula
The basic formula is:
Lumens = Lux × Area (m²)
For example, if you have 200 lux lighting over a 10 m² room:
Lumens = 200 × 10 = 2,000 lumens
Examples
100 lux to lumens
For 100 lux over 5 m²:
Lumens = 100 × 5 = 500 lumens
1000 lux to lumens
For 1000 lux over 2 m²:
Lumens = 1000 × 2 = 2000 lumens
10000 lux to lumens
For 10000 lux over 0.5 m²:
Lumens = 10000 × 0.5 = 5000 lumens
200 lux to lumens
For 200 lux over 8 m²:
Lumens = 200 × 8 = 1600 lumens
12000 lux to lumens
For 12000 lux over 0.25 m²:
Lumens = 12000 × 0.25 = 3000 lumens
300 lux to lumens
For 300 lux over 6 m²:
Lumens = 300 × 6 = 1800 lumens
5000 lux to lumens
For 5000 lux over 1 m²:
Lumens = 5000 × 1 = 5000 lumens
500 lux to lumens
For 500 lux over 4 m²:
Lumens = 500 × 4 = 2000 lumens
You can also check out our reverse conversion tool here: Convert Lumens to Lux for complete lighting measurement flexibility.
