Volts to Amps Conversion Calculator (V to A) Full Load Current Chart

Volts to Amps Calculator (V to A):

For calculating current from voltage, we can use two methods, one is ohms’ law and another one is power calculations.

Select calculation:  
Enter volts: V
Enter watts: W
   
Result in amps: A

 

Ohms law Resistance method

As you know voltage is the multiplication of current and resistance, hence current can be calculated by dividing the voltage by resistance. Let we find the formula

V(V) = I(A) x R(Ω)

From that, the current in Amps

I(A) = V(V) / R(Ω)

Current = Voltage / Resistance.

Amp = Volts / Resistance.

Volts to Amps conversion – Power Calculation method:

The power is the multiplication of current and voltage. Therefore, the current I(A) can be calculated from the Power P(W) divided by the voltage V(V) in Volts.

P(W) = I(A) * V(V)

Hence, the current I(A)

Learn More:   VA to kW Conversion calculator With Motor kW chart

I(A) = P(W) / V(V)

Current = Power / Voltage

Amps = Watt / Volts

Example:

Calculated the rated current of the 230 Volts, 2645 W, 20 Ohm water heater.

Apply our first method,

I(A) = 230 / 30

Current = 11.5 Amps

Using the Second method,

I(A) = 2645 / 230

Current = 11.5 Amps

Same 11.5 Amps received from our calculations. Hence you can calculate Amps in both ways but you get the same result.

Volts to Amp conversion chart for the standard Motors:

Blow tables are the pre-calculated Volts to Amp conversion value for the different rating of the DC motor at 400 Volts.

S. No kW Watts DC Volts Amps
1 0.75 750 400 1.88
2 1.1 1100 400 2.75
3 1.5 1500 400 3.75
4 2.2 2200 400 5.50
5 3.7 3700 400 9.25
6 5.5 5500 400 13.75
7 7.5 7500 400 18.75
8 11 11000 400 27.50
9 15 15000 400 37.50
10 22 22000 400 55.00
11 37 37000 400 92.50
12 50 50000 400 125.00
13 75 75000 400 187.50
14 90 90000 400 225.00
15 110 110000 400 275.00
16 132 132000 400 330.00
17 150 150000 400 375.00
18 175 175000 400 437.50
19 220 220000 400 550.00
20 250 250000 400 625.00
21 280 280000 400 700.00
22 310 310000 400 775.00
23 350 350000 400 875.00
24 375 375000 400 937.50
25 420 420000 400 1050.00
Learn More:   Volts to Electron-Volts Calculator (V to eV) Online

 

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