Illuminance converter
Light falling on a surface.
Converter
Quick pairs
tap to loadOne lux in every illuminance unit
8 rows| Unit | Symbol | 1 lx equals |
|---|---|---|
| Kilolux | klx | 0.001 |
| Millilux | mlx | 1,000 |
| Lumen per square meter | lm/m² | 1 |
| Lumen per square centimeter | lm/cm² | 0.0001 |
| Lumen per square foot | lm/ft² | 0.09290304 |
| Foot-candle | fc | 0.09290304 |
| Phot | ph | 0.0001 |
| Nox | nox | 1,000 |
How the lux to foot-candle conversion works
Office desks are lit to roughly 300. 500 lux; overcast daylight is around 1 000 lux.
Multiply by 0.09290304 to go from lux to foot-candle:
fc = lx × 0.09290304
Going the other way, multiply by 10.76391042, which is the same as dividing by 0.09290304.
Questions
How many foot-candle are in one lux?
One lux equals 0.09290304 foot-candle.
Which units does this illuminance converter cover?
9 units in total, all referenced to the lux. They include lux, kilolux, millilux, lumen per square meter, lumen per square centimeter, lumen per square foot and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.