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Units & converters

Illuminance converter

Compare illuminance in lux, kilolux, foot-candles and phot.

Free & no registration Calculated in your browser
01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Converted value = original value × source factor / target factor

Worked example

1 foot-candle = 10.76391042 lux (lx).

Things to check

  • Lux describes luminous flux per area. One foot-candle is one lumen per square foot. Luminous intensity and illuminance are separate quantities.
  • Rounding is applied only to displayed results. Very small or very large values may appear in scientific notation.

Sources and references