Lux to PPFD converter

Enter a lux reading and pick your light source. The converter divides by a typical lux-to-PPFD factor for that spectrum. This is an estimate, not a calibrated measurement.

FAQ

How do you convert lux to PPFD?

Divide the lux reading by a conversion factor that depends on the light source spectrum. Each source type has a different factor because lux is weighted for the human eye, not for photosynthesis.

Is a lux-to-PPFD conversion accurate?

It is an approximation. A single factor cannot capture every spectrum, and phone lux sensors vary between models. For measurements that matter, use a calibrated quantum sensor.

Conversion factors are approximate, rounded values commonly cited for each source type. They are placeholders pending a sourced reference table.