Illuminance Units & Calculator
Illuminance is luminous flux per area. A foot-candle is one lumen per square foot.
Detailed explanation & worked examples
Conversion method
Base value = input × source factor + source offset. Output = (base value − target offset) ÷ target factor. Only units from this family can be converted together.
Worked example
For the first two units below: 1 Lux becomes 0.09290304 Foot-candle.
| Unit | Multiplier | Offset |
|---|---|---|
| Lux | 1 | 0 |
| Foot-candle | 10.76391041671 | 0 |
Illuminance is luminous flux per area. A foot-candle is one lumen per square foot.
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