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Calculateur kW en Ampères
🔋 Conversion Électrique

Ampères en kW Calculateur

Déterminez la puissance en kilowatts en saisissant le courant et la tension. Essentiel pour mesurer la consommation électrique et la performance des équipements.

Saisie de Mesure

Ampérage → Puissance

Décimales
3
Puissance Calculée
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kW

Les kilowatts représentent le travail réel effectué.

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Les Formules de Calcul

Le calcul de puissance diffère entre les environnements CC et CA.

Systèmes CC
P(kW) = (I × V) / 1000

Mesure directe de la puissance sans variables de phase.

CA Monophasé
P = (I × V × PF) / 1000

Utilisé pour les systèmes résidentiels et commerciaux monophasés.

CA Triphasé
P = (√3 × I × V × PF) / 1000

Norme pour les machines lourdes et les réseaux industriels.

How to Convert Amps to Kilowatts

Converting amperes to kilowatts tells you how much real power a circuit is delivering — essential for energy monitoring, billing verification, generator load assessment, and equipment sizing. Because voltage and system type (DC vs. AC) affect the result, you cannot convert amps to kW without knowing the supply voltage and, for AC systems, the power factor.

Key Takeaway

Amps alone tell you nothing about power — a 10A current at 12V delivers just 120W, while the same 10A at 240V delivers 2,400W. Always include voltage and power factor when converting to kilowatts for accurate results.

Common Use Cases

  • Energy Monitoring: Smart meters and clamp meters measure current. Multiply by voltage and PF to get real kW demand for utility billing cross-checks.
  • Generator Load Assessment: Sum the kW of connected loads to verify you're not exceeding generator rated output.
  • Solar System Input: Calculate the kW input from your charge controller's amp reading and battery voltage.
  • Motor Power Verification: Confirm a motor is delivering its rated kW output by measuring its input current and accounting for efficiency.

Step-by-Step Conversion Guide

  1. Measure or Find the Current: Use a clamp meter for live readings or the nameplate FLA (Full Load Amps) for rated values.
  2. Confirm the Supply Voltage: Check the panel label or equipment nameplate — never assume.
  3. Determine Power Factor: For DC or pure resistive loads, use PF = 1.0. For motors and mixed AC loads, use the nameplate PF or a typical value of 0.85.
  4. Select the Circuit Type: DC, single-phase AC, or three-phase AC — each uses a different formula.
  5. Calculate: Apply the appropriate formula and the result is real power in kilowatts.