Grow Room Electricity Calculator

Grow Room Electricity & Power Cost Calculator

Estimate daily, monthly, and yearly energy use and cost for your entire grow room. Add lights and equipment, apply your utility rate (or Time-of-Use), and export results. Need help sizing power or circuits? Talk to a Grow Expert.

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Grow Room Electricity Calculator

Advanced (Time-of-Use)
Remove Device iName your equipment (e.g., LED Grow Light, Inline Fan). Watts iRated power draw (W). Check the spec label or manual. Hours/Day iAvg daily runtime (e.g., lights 18h veg / 12h flower). Qty iHow many identical devices you’re running. kWh/Day i(Watts ÷ 1000) × Hours × Qty.
Total kWh/day: 0.00
Cost / Day: $0.00
Cost / Month: $0.00
Cost / Year: $0.00
How to use this calculator (step-by-step)
  1. Enter your utility rate in $/kWh (or use the default).
  2. Set days/month to estimate monthly cost accurately.
  3. Add devices via Preset or “+ Add device” and fill Watts/Hours/Qty.
  4. Optional TOU: add Peak rate + Peak hours to average your cost.
  5. Review totals: kWh/day, and daily/monthly/yearly cost update live.
  6. Copy or print the results; check “Remember my inputs” to save locally.

Formula: (Watts ÷ 1000) × Hours/Day × Qty = kWh/Day. Dehumidifiers/AC vary by model and duty cycle.

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