Lux to Lumens Converter

Plan grow-light output using measured lux values quickly. Match seedlings, herbs, and blooms to targets. Convert area and illuminance into useful lamp lumens today.

Conversion mode
Plant bed, bench, shelf, or canopy footprint.
Conversion uses 1 ft² = 0.09290304 m².
Disable averaging to use this field.
Used only when mode is Lumens → Lux.
Helpful when light varies across a bed.
Saved into downloads for record keeping.
Lux readings for averaging (up to 5)
Enter readings from different spots, then enable averaging.
Tip: Measure at canopy height.

Example data table

These examples illustrate typical garden-use scenarios. Actual needs depend on crop type, growth stage, and lamp spectrum.

Lux Area (m²) Estimated lumens Use case note
8,000 1.50 12,000 Low-light herbs near a bright window.
12,500 2.00 25,000 Seedling tray under a small grow fixture.
18,000 3.25 58,500 Leafy greens across a bench area.
25,000 4.00 100,000 High-intensity zone for fruiting plants.

Formula used

How to use this calculator

  1. Measure lux at plant canopy height with a light meter.
  2. Enter the growing area footprint and choose the area unit.
  3. Select Lux → Lumens to estimate total lumens.
  4. Enable averaging when readings vary across the bed or shelf.
  5. Press Submit to view results above the form.
  6. Use Download CSV or Download PDF for records.
Tip: Lux depends on distance and beam spread; measure where plants grow.

Related Calculators

Room lighting level calculatorWatts to lumens converterLumens to lux converterFootcandle to lux converterCeiling light spacing calculatorPendant light spacing calculatorChandelier hanging heightVanity light size calculatorTask lighting calculatorAccent lighting calculator

Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.