Work out lux to foot candle instantly with clear inputs, formula shown and shareable results.
Converting Lux to Foot-candles is one multiplication: a single lx is 0.09290304 fc, so the amount is scaled by that factor. Reversing the direction divides by the same factor. The factor is an exact definition rather than a rounded figure, so the result stays precise at any magnitude. The factor is exactly the number of square metres in a square foot, because both units are lumens per unit area.
Lux → Foot-candles
fc = lx × 0.09290304
Foot-candles → Lux
lx = fc ÷ 0.09290304
One lx equals 0.09290304 fc. That value is exact by definition.
Divide by 0.09290304 rather than multiplying, or flip the direction selector which does it for you.