This converter computes electric current (A, Ampere) using the formula A = W ÷ V. It accepts power in watts (W) and voltage in volts (V), which are standard SI units.
Watts to Amps Converter
Enter the wattage and voltage below, then press the "Convert" button
Wattage (W)
Voltage (V)
Result in Amps (A)
Usage Instructions
- Input Values: Enter the power value in watts (W) and the voltage in volts (V) into the designated fields.
- Set Precision: Optionally specify the number of decimal places you require for the result in the “Decimal Places” field.
- Calculate: Click the “Convert” button. The tool applies the formula A = W ÷ V to compute the current.
- View Result: The calculated current (A) is displayed along with a breakdown of the computation.
- Additional Functions:
- Copy Result: Click to copy the calculated value to your clipboard.
- Clear All: Reset all input and output fields.
- Swap: Press the button to convert amperes to watts.
Measurement Unit Definitions
Watt (W): The SI unit of power. One watt is defined as one joule per second (1 W = 1 J/s), which quantifies the rate of energy transfer.
Volt (V): The SI unit of electrical potential difference. One volt equals one joule per coulomb (1 V = 1 J/C), indicating the energy available per unit of electric charge.
Ampere (A): The SI unit of electric current. One ampere represents the flow of one coulomb per second (1 A = 1 C/s), measuring the rate at which charge moves in a circuit.
Conversion Formula
The formula to calculate electric current (A) is:
A = W ÷ V
Where:
A = Current in amperes (A)
W = Power in watts (W)
V = Voltage in volts (V)
This formula is derived from Ohm’s Law and the definition of electrical power, where power (W) is the product of voltage (V) and current (A). Solving for current gives the equation A = W ÷ V. It applies to both AC and DC circuits, assuming a purely resistive load. In AC systems, if power factor (PF) is considered, the modified formula is A = W ÷ (V × PF).
Conversion Table
| Wattage (W) | Voltage (V) | Current (A) |
|---|---|---|
| 60 | 120 | 0.50 |
| 100 | 120 | 0.83 |
| 150 | 120 | 1.25 |
| 200 | 120 | 1.67 |
| 250 | 120 | 2.08 |
| 300 | 120 | 2.50 |
| 500 | 120 | 4.17 |
| 750 | 120 | 6.25 |
| 1000 | 120 | 8.33 |
| 1500 | 120 | 12.50 |
| 2000 | 220 | 9.09 |
| 2500 | 220 | 11.36 |
| 3000 | 220 | 13.64 |
| 3500 | 220 | 15.91 |
| 4000 | 220 | 18.18 |
| 4500 | 220 | 20.45 |
| 5000 | 220 | 22.73 |
| 5500 | 220 | 25.00 |
| 6000 | 220 | 27.27 |
Real World Examples
- A 60W incandescent bulb in the United States (120V) draws 0.50A, while the same bulb in Europe (230V) draws 0.26A.
- A 1000W hairdryer in Canada (120V) requires 8.33A, but in Australia (230V), it only draws 4.35A.
- A 1500W electric kettle in the UK (230V) operates at 6.52A, while in Japan (100V), it needs 15.00A.
- A 1200W microwave in South Korea (220V) consumes 5.45A, whereas in Mexico (127V), it draws 9.45A.
- A 90W LED streetlight in Germany (230V) runs on 0.39A, while in the Philippines (220V), it draws 0.41A.
- A 2000W space heater in France (230V) requires 8.70A, while in the U.S. (120V), a similar model would need 16.67A.
- A 75W ceiling fan in Brazil (127V) draws 0.59A, while in India (240V), it consumes only 0.31A.
- A 5000W industrial air conditioner in Saudi Arabia (220V) operates at 22.73A, but in the U.S. (240V), the same unit draws 20.83A.
- A 300W gaming PC in South Africa (230V) uses 1.30A, while in Taiwan (110V), it requires 2.73A.
- A 2500W electric stove in Argentina (220V) pulls 11.36A, while in Thailand (230V), it operates at 10.87A.
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