Amps to Wattage Calculator for Garden Power

Quickly turn amps into watts for garden setups. Choose AC, DC, single, or three phase. Download results, compare examples, and plan power confidently always.

Calculator

Useful for pumps, grow lights, heaters, fans, and timers.

Enter what the label shows; the tool converts units.
For three-phase, use line-to-line voltage.
Match the type shown on your equipment plate.
Use 1.00 for resistive loads and many LEDs.
Motors and inverters often range 0.75–0.95.
Notes appear in exports to document your setup.

Example Data Table

Garden DeviceSystemAmpsVoltagePFEff.Estimated Input Watts
Drip irrigation booster pumpAC Single2.3 A230 V0.850.90449.7 W
Greenhouse exhaust fanAC Single1.1 A230 V0.800.88202.4 W
12V grow light stripDC3.5 A12 V—0.9542.0 W
Small pond aeratorAC Single0.7 A120 V0.900.9075.6 W
Workshop dust extractor (3φ)AC Three5.0 A400 V0.880.923,048.4 W
Input watts are shown before efficiency. Output watts depend on your efficiency entry.

Formula Used

Use power factor for motors and inductive loads. Efficiency estimates usable output from electrical input.

How to Use This Calculator

  1. Find amps and voltage on the device label.
  2. Select DC, AC single-phase, or AC three-phase.
  3. For AC motors, enter a realistic power factor (0.7–0.95).
  4. Enter efficiency if known; otherwise keep the default.
  5. Press Calculate to see results above the form.
  6. Download CSV or PDF for planning and documentation.

Planning tip: keep safety headroom on circuits, especially outdoors.

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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.