Smart Plug Load Calculator for Garden Gear

Size your garden smart plug before connecting gear. Add devices, schedules, and safety margin quickly. See amps, watts, costs, and overload warnings instantly today.

Smart Plug Load Calculator

Enter your greenhouse or garden devices, then calculate total load, energy, and safety margin.

Use 230V or 120V depending on your region.
Example: 10A or 16A.
If your plug lists watts, add it here.
80% is a common continuous-load guideline.
Leave 0 to skip cost estimate.
Used only for display.
For controllers, hubs, or standby loads.

Devices

Device Watt Qty PF Duty % Hours/day Days/week Surge x Remove

Example Data Table

This sample mirrors a typical small grow tent setup.

Device W Qty PF Duty % Hours/day Days/week Surge x
LED grow light12010.951001271.0
Water pump6010.8560272.5
Circulation fan2520.901001871.2

Formula Used

Peak is a practical estimate for motor starts. If many motors start together, peaks can be higher.

How to Use This Calculator

  1. Set your voltage and your smart plug’s amp rating.
  2. Use Safety limit (often 80%) for continuous operation.
  3. Add each device’s watts, quantity, power factor, duty cycle, and schedule.
  4. Press Calculate Load to see watts, amps, and energy use.
  5. If you exceed limits, reduce runtime or split equipment across outlets.
  6. Use Download CSV or Download PDF after calculating.

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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.