Illuminance Units

Find the right formula and tools for all illuminance units. We use official rules to make sure every calculation is correct.

All Illuminance Unit Pairs

Pick a starting unit to see all possible conversion tools for illuminance.

We calculate all illuminance units based on the standard Lux. This helps us keep all our tools accurate and reliable.

Below is the list of rules we use to calculate each illuminance unit. You can use these to understand the math behind our tools.

Formula: 1 Foot-candle = 10.7639 Lux
To do the math instantly, use our foot-candle to lux or lux to foot-candle tools.

Compare these units against other measurement systems on our homepage.

Access our high-fidelity calculators for other measurement systems and engineering metrics.