PPFD grow light calculator

PPFD Grow Light Calculator

Estimate PPFD and DLI for your grow light setup — in umol/m2/s and mol/m2/day.

Common: 200W, 400W, 600W, 1000W

Please enter valid dimensions and wattage.

0
umol/m2/s
PPFD (estimated avg)
0
mol/m2/day
DLI
PPFD scale – where your setup sits
040080012001600+
Light type and efficacy
Grow area
Total photon output
Light hours
Watts per m2

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PPFD and DLI targets by crop
Seedlings / microgreens100-300 umol6-12 DLI
Lettuce / herbs200-400 umol12-17 DLI
Veg cannabis / tomatoes400-600 umol20-30 DLI
Flowering cannabis600-900 umol30-45 DLI
High light crops800-1200 umol40-60 DLI
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.