Lx to Fc Converter – Convert lux to footcandles

This converter applies the exact factor 1 lux = 0.09290304 footcandles. Multiply any value in lux by 0.09290304 to get footcandles: the worked example 100 lx × 0.09290304 = 9.29 fc shows the arithmetic in a single line. Lux and footcandles quantify illuminance — how much light lands on a surface — with lux in lumens per square meter and the footcandle in lumens per square foot. The conversion mirrors the area factor exactly: 1 footcandle = 10.7639104 lux, because a square foot covers 0.09290304 m², so no measurement uncertainty enters the arithmetic. For reverse conversions divide by 0.09290304 instead — identical to multiplying by 10.7639104 — for example 9.29 fc ≈ 100 lx. Quick mini table: 1 lx = 0.092903 fc; 5 lx = 0.464515 fc; 10 lx = 0.92903 fc; 50 lx = 4.65 fc; 100 lx = 9.29 fc. Office standards are written around 500 lux (about 46 fc), warehouses run 100–150 lux, and a bright overcast sky delivers about 1000 lux — anchors that reveal a missed factor of ten instantly.

1. 1

   Step 1

   Enter your value in lux (lx)

2. 2

   Step 2

   The converter multiplies it by the exact factor 0.09290304

3. 3

   Step 3

   Read the result in footcandles (fc)

4. 4

   Step 4

   Hit swap to convert footcandles back to lux instantly

• 1

  1 fc = 10.76 lux; memorize 50 fc ≈ 538 lux for offices

• 2

  Divide total lumens by area in m² for a first-pass lux estimate

• 3

  Standards: 300 lux reading, 500 lux office, 750 lux fine work

• 4

  Grow lights: leaf canopy wants 10,000–50,000 lux depending on plant

• Comparing lamp lumens to required lux without dividing by room area

• Using the 10.76 factor in the wrong direction between fc and lux

• Confusing illuminance (lux) with luminance (cd/m²) in screen specs