Watts to Amps Converter
Convert watts to amps instantly with our precise online calculator. Supports DC, single-phase, and three-phase AC systems. Perfect for electrical engineers, electricians, and DIY enthusiasts.
Watts to Amps Converter
Enter watts and voltage values to calculate amperes. Select the current type (DC or AC) and provide the power factor for AC circuits.
Select the type of electrical current for your calculation
Enter the power value in watts (must be greater than 0)
Enter the voltage value in volts (must be greater than 0)
Conversion Formulas
DC (Direct Current) Formula
I(A) = P(W) / V(V)
Where:
• I = Current in amperes (A)
• P = Power in watts (W)
• V = Voltage in volts (V)
AC Single Phase Formula
I(A) = P(W) / (V(V) × PF)
Where:
• I = Current in amperes (A)
• P = Power in watts (W)
• V = Voltage in volts (V)
• PF = Power Factor (typically 0.8-0.95)
AC Three Phase Formula
I(A) = P(W) / (√3 × V(V) × PF)
Where:
• I = Current in amperes (A)
• P = Power in watts (W)
• V = Line-to-line voltage in volts (V)
• PF = Power Factor (typically 0.8-0.95)
• √3 ≈ 1.732
Watt (W)
What is a Watt (W)?
A watt (symbol: W) is the SI unit of power, representing the rate of energy transfer or conversion. One watt is equal to one joule per second (1 W = 1 J/s). It is named after Scottish inventor James Watt, who made significant improvements to the steam engine.
How Watts Relate to Electrical Power
In electrical systems, power in watts is calculated as the product of voltage and current: P = V × I (for DC circuits) or P = V × I × PF (for AC circuits with power factor). This relationship allows us to determine how much electrical energy is being consumed or produced per unit of time.
Common Applications
Watts are used to rate electrical appliances, light bulbs, motors, and power supplies. For example, a 60W light bulb consumes 60 watts of electrical power, while a typical microwave might use 1000-1500W.
Ampere (A)
What is an Ampere (A)?
An ampere (symbol: A), often shortened to amp, is the SI unit of electric current. It represents the flow of electric charge through a conductor. One ampere is defined as one coulomb of charge passing through a point in one second (1 A = 1 C/s).
Historical Context
The ampere is named after French physicist André-Marie Ampère (1775-1836), who is considered the father of electrodynamics. The modern definition was established as part of the International System of Units (SI) and was refined in 2019 based on fundamental physical constants.
Practical Significance
Amperage is crucial for electrical safety and circuit design. The current rating of wires, circuit breakers, and fuses is specified in amperes. Household circuits typically handle 15-20A, while industrial equipment may require hundreds of amperes. Understanding amperage helps prevent overloading circuits and electrical fires.
Watts to Amps Conversion Table
The conversion of watts to amps at various common voltages (DC) are provided below:
- Watts (W)
- Voltage (V)
- Amperes (A)
- 100 W
- 12 V
- 8.33 A
- 200 W
- 12 V
- 16.67 A
- 300 W
- 12 V
- 25.00 A
- 500 W
- 12 V
- 41.67 A
- 1000 W
- 12 V
- 83.33 A
- 1500 W
- 12 V
- 125.00 A
- 2000 W
- 12 V
- 166.67 A
- 3000 W
- 12 V
- 250.00 A
- 5000 W
- 12 V
- 416.67 A
- 10000 W
- 12 V
- 833.33 A
- 100 W
- 24 V
- 4.17 A
- 200 W
- 24 V
- 8.33 A
- 300 W
- 24 V
- 12.50 A
- 500 W
- 24 V
- 20.83 A
- 1000 W
- 24 V
- 41.67 A
- 1500 W
- 24 V
- 62.50 A
- 2000 W
- 24 V
- 83.33 A
- 3000 W
- 24 V
- 125.00 A
- 5000 W
- 24 V
- 208.33 A
- 10000 W
- 24 V
- 416.67 A
- 100 W
- 120 V
- 0.83 A
- 200 W
- 120 V
- 1.67 A
- 300 W
- 120 V
- 2.50 A
- 500 W
- 120 V
- 4.17 A
- 1000 W
- 120 V
- 8.33 A
- 1500 W
- 120 V
- 12.50 A
- 2000 W
- 120 V
- 16.67 A
- 3000 W
- 120 V
- 25.00 A
- 5000 W
- 120 V
- 41.67 A
- 10000 W
- 120 V
- 83.33 A
- 100 W
- 230 V
- 0.43 A
- 200 W
- 230 V
- 0.87 A
- 300 W
- 230 V
- 1.30 A
- 500 W
- 230 V
- 2.17 A
- 1000 W
- 230 V
- 4.35 A
- 1500 W
- 230 V
- 6.52 A
- 2000 W
- 230 V
- 8.70 A
- 3000 W
- 230 V
- 13.04 A
- 5000 W
- 230 V
- 21.74 A
- 10000 W
- 230 V
- 43.48 A
At12 V (DC)
At24 V (DC)
At120 V (DC)
At230 V (DC)
