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Convert PPF to Lumens - Online Calculator

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

PPF (mol/s):  


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 or micromoles per second). 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 Lumens to PPF here

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