## How to convert electric power in watts (W) to electric current(I) in amps (A)?

### watts to amps calculation formula in case of Direct Current

**I(in Amps) = P(in Watts) / V(in Volts)**

So that you can define “Current are equivalent to the power(in watts) divided by volts(V).

**amps(A) = watt(W) / volt(V)**

**A = W / V**

I=The current I in amps (A)

p=the power P in watts (W)

V=the voltage V in volts (V)

**Let’s take an example**

**Example#1**

Wee need to Find out the current(I) in amps where the power(P) is 300 watts and the voltage(V) supply is 100 volts in the circuit.

I = 300W / 100V = 3A

## How to convert watts to amps?

### watts to amps calculation formula in AC single phase

I= Current in amps (A)

P=the power P in watts (W)

PF=the power factor PF

V=the Root Mean Square voltage V in volts (V)

**I(in Amps) = P(in Watts) / (Power Factor × V(in Volts) )**

So that you can define Current(in amps) are equal to the Power(in watts) divided by PF times volts(V).

**amps(A) = watts(W) / (Power Factor × volts(V))**

or you can re-write formula like this

**A = W / (PF × V)**

**Let’s take an example**

**Example#1**

Find out the current(I) in amps where the power(P) is 300 watts and the PF is 0.8 and the Root Mean Square voltage(V) supply in the circuit is 100 volts

I = 300W / (0.8 × 100V) = 3.75A

### **watts to amps calculation formula in case of AC three phase line to line voltage**

I=The phase current I in amps (A)

P=the real power P in watts (W)

PF=power factor PF

VL-L=the line to line Root Mean Square voltage VL-L in volts (V)

**I(A) = P(in Watts) / (1.732 × Power Factor × VL-L(in Volts) )**

So that you can define “Current(I) amps are equal to Power(in watts) divided by 1.732 PF times volts”

**amps(A) = watts(W) / (√3 × PF × volts(V))**

or You can re-write this formula like this

**A = W / (√3 × PF × V)**

**Let’s take an example**

**Example#2**

Find out the current(I) in amps where the power(P) is 300 watts, the PF is 0.8 and the Root Mean Square voltage(V) in the circuit is 100 volts.

I = 300W / (1.732 × 0.8 × 100V) =300/138.56=2.165A

### In case of line to neutral voltage

I=The phase current I in amps (A)

P=the real power P in watts (W)

PF=the power factor PF

VL-0=the line to neutral Root Mean Square voltage VL-0 in volts (V)

**I(A) = P(in Watts) / (3 × Power Factor × VL-0(in Volts) )**

So that you can define Cuurent(I) amps are equal to the power(P in watts) divided by 3 times PF times volts(V).

**amps(A) = watts(W) / (3 × PF × volts(V))**

or you can rewrite this formula like this

**A = W / (3 × PF × V)**

**Let’s take an example**

**Example#3**

Find out the current(I) in amps where the power(P) is 300 watts, the PF is 0.8 and the Root Mean Square voltage(V) in the circuit is 100 volts

I = 300W / (3 × 0.8 × 100V) =300W/240=1.25A

where DC = Direct Current, AC = Alternating Current

You can easily calculate below conversion using this tool

- 1 amp = watts
- Watts to amps calculator AC
- Watts to amps at 12V
- Watts to amps 240V
- Watts to amps at 220V
- Watts to amps calculator DC
- 1000 watts to amps

Watts to Amps at 5V

Power (W) | Voltage (V) | Amps (A) |
---|---|---|

5 | 5 | 1 |

10 | 5 | 2 |

15 | 5 | 3 |

20 | 5 | 4 |

25 | 5 | 5 |

30 | 5 | 6 |

35 | 5 | 7 |

40 | 5 | 8 |

45 | 5 | 9 |

50 | 5 | 10 |

55 | 5 | 11 |

60 | 5 | 12 |

65 | 5 | 13 |

70 | 5 | 14 |

75 | 5 | 15 |

Power (W) | Voltage (V) | Amps (A) |
---|---|---|

12 | 12 | 1 |

24 | 12 | 2 |

36 | 12 | 3 |

48 | 12 | 4 |

60 | 12 | 5 |

72 | 12 | 6 |

84 | 12 | 7 |

96 | 12 | 8 |

108 | 12 | 9 |

120 | 12 | 10 |

132 | 12 | 11 |

144 | 12 | 12 |

156 | 12 | 13 |

168 | 12 | 14 |

180 | 12 | 15 |

Power (W) | Voltage (V) | Amps (A) |
---|---|---|

110 | 110 | 1 |

220 | 110 | 2 |

330 | 110 | 3 |

440 | 110 | 4 |

550 | 110 | 5 |

660 | 110 | 6 |

770 | 110 | 7 |

880 | 110 | 8 |

990 | 110 | 9 |

1100 | 110 | 10 |

1210 | 110 | 11 |

1320 | 110 | 12 |

1430 | 110 | 13 |

1540 | 110 | 14 |

1650 | 110 | 15 |

Power (W) | Voltage (V) | Amps (A) |
---|---|---|

220 | 220 | 1 |

440 | 220 | 2 |

660 | 220 | 3 |

880 | 220 | 4 |

1100 | 220 | 5 |

1320 | 220 | 6 |

1540 | 220 | 7 |

1760 | 220 | 8 |

1980 | 220 | 9 |

2200 | 220 | 10 |

2420 | 220 | 11 |

2640 | 220 | 12 |

2860 | 220 | 13 |

3080 | 220 | 14 |

3300 | 220 | 15 |

Power (W) | Voltage (V) | Amps (A) |
---|---|---|

240 | 240 | 1 |

480 | 240 | 2 |

720 | 240 | 3 |

960 | 240 | 4 |

1200 | 240 | 5 |

1440 | 240 | 6 |

1680 | 240 | 7 |

1920 | 240 | 8 |

2160 | 240 | 9 |

2400 | 240 | 10 |

2640 | 240 | 11 |

2880 | 240 | 12 |

3120 | 240 | 13 |

3360 | 240 | 14 |

3600 | 240 | 15 |