Amps To Watts (W) Conversion Calculator

Amps to Watts Calculator

Electric current in amps (A) to electric power in watts (W) calculator.

• Watts to Amps
• Amps to Watts

Current type Direct Current (DC) Alternating Current (AC) - Single phase Alternating Current (AC) - Three phase Current (amps) mA A kA Voltage type Line to line voltage Line to neutral voltage Voltage (volts) mV V kV Power factor (≤1) = Calculate × Reset ⇅ Swap Power (watts) W Power (kilowatts) kW Power (milliwatts) mW

Watts to amps calculator ►

* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12

Ampere

Ampere (A) is a unit of electric current. Electric current is the rate of electric charge flow per time unit. One ampere (A) is equal to one coulomb (Q) per second (s).

Watt

Watt (W) is a unit of power. Power is the rate of energy usage per time unit. One watt (W) is equal to one joule (J) per second (S).

DC amps to watts calculation

The power P in watts (W) is equal to the current I in amps (A), times the voltage V in volts (V):

P(W) = I(A)× V(V)

Or

Watts = Amps × Volts

AC single phase amps to watts calculation

The power P in watts (W) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V):

P(W) = PF × I(A)× V(V)

Or

Watts = PF × Amps × Volts

AC three phase amps to watts calculation

Calculation with line to line voltage

The power P in watts (W) is equal to square root of 3 times the power factor PF times the phase current I in amps (A), times the line to line RMS voltage VL-L in volts (V):

P(W) = √3 × PF × I(A)× VL-L(V)

Calculation with line to neutral voltage

The power P in watts (W) is equal to 3 times the power factor PF times the phase current I in amps (A), times the line to neutral RMS voltage VL-N in volts (V):

P(W) = 3 × PF × I(A)× VL-N(V)

Typical power factor values

Do not use typical power factor values for accurate calculations.

Device	Typical power factor
Resistive load	1
Fluorescent lamp	0.95
Incandescent lamp	1
Induction motor full load	0.85
Induction motor no load	0.35
Resistive oven	1
Synchronous motor	0.9

Amps to watts table (120V)

Current (A)	Voltage (V)	Power (W)
0.1 amps	120 volts	12 watts
0.2 amps	120 volts	24 watts
0.3 amps	120 volts	36 watts
0.4 amps	120 volts	48 watts
0.5 amps	120 volts	60 watts
0.6 amps	120 volts	72 watts
0.7 amps	120 volts	84 watts
0.8 amps	120 volts	96 watts
0.9 amps	120 volts	108 watts
1 amps	120 volts	120 watts
2 amps	120 volts	240 watts
3 amps	120 volts	360 watts
4 amps	120 volts	480 watts
5 amps	120 volts	600 watts
6 amps	120 volts	720 watts
7 amps	120 volts	840 watts
8 amps	120 volts	960 watts
9 amps	120 volts	1080 watts
10 amps	120 volts	1200 watts

Amps to watts calculation ►

See also

• How to convert amps to watts
• Watts to amps calculator
• Power factor calculator
• Amps to kW calculator
• Ohms law calculator
• Lumens to watts calculator
• Ampere (A)
• Volt (V)
• Watt (W)
• Power factor
• Electrical calculation
• Power conversion