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Convert Lumens to PPF - Online Calculator

Home /  Blog /  Horticulture /  Convert Lumens to PPF - Online Calculator

Lumens:         


Spectrum:  











Result: -





About the Lumens to PPF (umol/s) Calculator



You may find yourself comparing LED grow light specifications, where one light uses lumens and the other uses PAR units such as PPF (umol/s). How do you compare the two?

It is not possible to convert Lumens to micromoles per second absolutely accurately without providing the light source's spectral power distribution (SPD). In reality, however, obtaining a light source's exact SPD is not an easy task for the average grower - it requires expensive spectrometer equipment.

We have therefore developed the calculator below which allows for approximate conversions between lumens and PPF based on some assumptions about the light source's SPD. To improve the approximations for your particular light source, select the SPD that most closely resembles that of your light source.

Need to go the other way? See our PPF to Lumens calculator here

Need to convert lux to PPFD micromoles per second per meter squared? See our lux to PPFD calculator here