Watts to Amps Calculator
Quickly convert watts to amps using this free online calculator. Works for DC, single-phase, and three-phase AC systems. Instant, accurate electrical conversions.
Quick Intro: Convert Watts to Amps
To convert watts to amps, simply divide the power in watts by the voltage in volts. For AC systems, you'll also multiply by a power factor and √3 if it's three-phase. This calculator automatically applies the correct formula based on the input type (DC, single-phase, or three-phase AC), making it a fast and reliable way to find current values. Use the form below to enter your watt and voltage values, and get instant amp results with our built-in formula and data table conversion.
Formulas for Watts to Amps Conversion
- DC: Amps = Watts ÷ Volts
- AC Single-Phase: Amps = Watts ÷ (Volts × Power Factor)
- AC Three-Phase: Amps = Watts ÷ (√3 × Volts × Power Factor)
*Use power factor = 0.8 if unknown.
Watts to Amps Calculator Overview
TheWatts to Amps Calculator helps you instantly convert electrical power (watts) into current (amps) based on your input voltage and phase type (DC, AC single-phase, or AC three-phase). Whether you're an electrical engineer, a technician, or just need to size a circuit correctly, this calculator gives fast, accurate results. Just enter your wattage and voltage, and it will show the amp value instantly.
It uses the standard formulas for DC and AC calculations, including adjustments for power factor and √3 (for three-phase). No need for complex math or guesswork—this tool handles everything for you. Ideal for solar systems, inverters, appliances, and all electric load estimations. Designed to support international standards and units.
Watts to Amps Calculator conveter Data Table
| Power (Watts) | Voltage (Volts) | Type | Power Factor | Current (Amps) |
|---|---|---|---|---|
| 1000 W | 230 V | DC | — | 4.35 A |
| 2000 W | 230 V | Single-Phase | 0.8 | 10.87 A |
| 3000 W | 400 V | 3-Phase | 0.8 | 5.41 A |
Frequently Asked Questions - Watts to Amps Calculator:
What is the formula to convert watts to amps?
For DC: Amps = Watts ÷ Volts. For AC, you also consider power factor and phase.
Do I need a power factor for AC conversion?
Yes, for accurate AC calculations, the power factor (typically 0.8) must be included.
Can I convert kW to amps?
Yes, multiply kW by 1000 to get watts, then apply the formula.
How accurate is this calculator?
It provides highly accurate results, using standard electrical formulas.
Is this tool useful for both AC and DC circuits?
Yes, it works for DC, single-phase, and three-phase AC systems.
What if I don't know the power factor?
Use 0.8 as a common default for general calculations.
How many amps is 1000 watts at 120 volts?
For DC: 1000 ÷ 120 = 8.33 Amps.
Does voltage affect current?
Yes, higher voltage results in lower current for the same power.
Can I use this calculator for solar or inverter systems?
Absolutely, it’s ideal for off-grid, solar, and battery applications.
Is there a mobile version of this calculator?
Yes, it’s responsive and works on all smartphones and devices.
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