Kalkulator kW ke Amps Logo
Kalkulator kW ke Amps
⚡ Penukaran Elektrik

Amp kepada Watt Kalkulator

Tentukan dengan cepat berapa watt yang digunakan peranti anda dengan memasukkan bacaan ampere dan voltan masuk. Penting untuk mengukur kecekapan peralatan kecil.

Kalkulator Penggunaan

Ampere → Watt

Perpuluhan
0
Kuasa Dikira
—
W

Pengukuran kuasa aktif yang digunakan oleh beban.

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Formula Penukaran

Pengiraan kuasa bergantung kepada jenis litar anda — faktor kuasa diperlukan untuk semua sistem AC.

Sistem DC
W = I × V

Persamaan kuasa asas — ampere didarab volt bersamaan watt dalam semua litar DC.

AC 1-Fasa
W = I × V × PF

Faktor kuasa mengambil kira perbezaan fasa antara voltan dan arus, mengurangkan kuasa sebenar yang berkesan.

AC 3-Fasa
W = √3 × I × V × PF

Kuasa tiga fasa seimbang dijumlahkan merentasi ketiga-tiga fasa dengan pekali √3 (1.732) untuk voltan talian.

How to Convert Amps to Watts

Converting amperes to watts tells you how much real power a device consumes. This is essential for calculating energy costs, sizing generators, verifying circuit capacity, and comparing appliances. Multiply amps by volts — then apply the power factor for AC systems.

Real Power vs. Apparent Power

Real power (watts) is energy that actually does work — turning a motor, heating an element. Apparent power (VA) is what the supply delivers including reactive current. For heaters and lamps they're equal. For motors and transformers, watts are always lower than VA because some current builds magnetic fields without doing useful work.

Practical Applications

  • Energy Cost Calculation: Convert amps to watts, multiply by hours of use to get Wh, divide by 1000 for kWh, then multiply by your electricity tariff.
  • Generator Sizing: Sum the watts of all simultaneous loads and add 25% for motor startup surges.
  • Circuit Load Audit: Sum all load watts on a circuit. The total should not exceed 80% of the breaker rating × voltage (NEC continuous load rule).

Step-by-Step Conversion

  1. Read the Current: Measure with a clamp meter or find the amp rating on the device nameplate.
  2. Note the Voltage: Check your supply — 120V or 240V in North America; 230V in most of Europe.
  3. Apply Power Factor: Use 1.0 for pure resistive loads. Use 0.8–0.9 for motors and inductive equipment.
  4. Multiply: I × V for DC; I × V × PF for single-phase AC; √3 × I × V × PF for three-phase AC.