Illuminance Converter — 3 Units, Free & Instant
Convert between Illuminance units. Choose from 3 different units including Lux, Foot-candles, Phots.
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| From | Lux (lx) |
|---|---|
| Lux (lx) | 1 |
| Foot-candles (fc) | 10.7639104 |
| Phots (ph) | 10000 |
Lux and foot-candles
Illuminance measures light falling on a surface. The SI unit is the lux; US building codes and photography use the foot-candle (1 fc ≈ 10.76 lx). Offices target ~500 lx (46 fc), streets 10–30 lx, and daylight ranges from 1,000 lx overcast to 100,000 lx in full sun.