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Lux to Candela Calculator

Convert illuminance (lux) and distance back to point-source luminous intensity (candela).

Input Data

Input Illuminance E.
lx
Input Distance d.
m

Results

2,000cd
I = E × d² = 500 lx × 2² m² = 2000.000000 cd

At a glance:Lux to Candela Calculator: enter parameters to compute results; complements related calculators.

Formula

I = E × d²

E: illuminance (lx), d: distance (m), I: luminous intensity (cd)

How to Use

  1. Enter illuminance E (lux).
  2. Enter distance d (meters).
  3. Get luminous intensity I (candela).

Case Studies

E = 2.5 lx, d = 2 m

I = 2.5 × 4 = 10 cd.

FAQ

Vs candela-to-lux?

It is the inverse: I = E·d².

Multiple sources?

Sum illuminance first, then invert for an equivalent intensity.

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Lux to Candela Calculator（/light/lux-to-candela）。