Volts to Amps Calculator – Convert Volts and Watts to Amps

12 Volts = 8.333 Amps, this volts to amps calculator helps convert volts and watts to current, using Amps = Watts / Volts formula.

The calculator utilizes Ohm’s Law to determine the relationship between voltage (V), current (I), and resistance (R).

• 120 Volts: I = P / V: I = 240 W / 120 V = 2 A
• 220 Volts: I = 240 W / 220 V ≈ 1.09 A
• 230 Volts: I = 240 W / 230 V ≈ 1.04 A
• 240 Volts: I = 240 W / 240 V = 1 A
• 250 Volts: I = 240 W / 250 V = 0.96 A

Volts to Amps Calculator

Volts Converted to	Amps
1 V	100.00 A
2 V	50.00 A
3 V	33.33 A
4 V	25.00 A
5 V	20.00 A
6 V	16.67 A
7 V	14.29 A
8 V	12.50 A
9 V	11.11 A
10 V	10.00 A
11 V	9.09 A
12 V	8.33 A
13 V	7.69 A
14 V	7.14 A
15 V	6.67 A
16 V	6.25 A
17 V	5.88 A
18 V	5.56 A
19 V	5.26 A
20 V	5.00 A
21 V	4.76 A
22 V	4.55 A
23 V	4.35 A
24 V	4.17 A
25 V	4.00 A
26 V	3.85 A
27 V	3.70 A
28 V	3.57 A
29 V	3.45 A
30 V	3.33 A
31 V	3.23 A
32 V	3.12 A
33 V	3.03 A
34 V	2.94 A
35 V	2.86 A
36 V	2.78 A
37 V	2.70 A
38 V	2.63 A
39 V	2.56 A
40 V	2.50 A
41 V	2.44 A
42 V	2.38 A
43 V	2.33 A
44 V	2.27 A
45 V	2.22 A
46 V	2.17 A
47 V	2.13 A
48 V	2.08 A
49 V	2.04 A
50 V	2.00 A
51 V	1.96 A
52 V	1.92 A
53 V	1.89 A
54 V	1.85 A
55 V	1.82 A
56 V	1.79 A
57 V	1.75 A
58 V	1.72 A
59 V	1.69 A
60 V	1.67 A
61 V	1.64 A
62 V	1.61 A
63 V	1.59 A
64 V	1.56 A
65 V	1.54 A
66 V	1.52 A
67 V	1.49 A
68 V	1.47 A
69 V	1.45 A
70 V	1.43 A
71 V	1.41 A
72 V	1.39 A
73 V	1.37 A
74 V	1.35 A
75 V	1.33 A
76 V	1.32 A
77 V	1.30 A
78 V	1.28 A
79 V	1.27 A
80 V	1.25 A
81 V	1.23 A
82 V	1.22 A
83 V	1.20 A
84 V	1.19 A
85 V	1.18 A
86 V	1.16 A
87 V	1.15 A
88 V	1.14 A
89 V	1.12 A
90 V	1.11 A
91 V	1.10 A
92 V	1.09 A
93 V	1.08 A
94 V	1.06 A
95 V	1.05 A
96 V	1.04 A
97 V	1.03 A
98 V	1.02 A
99 V	1.01 A
100 V	1.00 A

Volts to Amps Conversion Chart

I (A) = P (W) / V (V)

Where P = 100 watts.

Volts to	Amps
100 V	1.00 A
110 V	0.91 A
120 V	0.83 A
130 V	0.77 A
140 V	0.71 A
150 V	0.67 A
160 V	0.625 A
170 V	0.59 A
180 V	0.56 A
190 V	0.53 A
200 V	0.50 A
210 V	0.48 A
220 V	0.45 A
230 V	0.43 A
240 V	0.42 A
250 V	0.40 A
260 V	0.38 A
270 V	0.37 A
280 V	0.36 A
290 V	0.34 A
300 V	0.33 A
310 V	0.32 A
320 V	0.31 A
330 V	0.30 A
340 V	0.29 A
350 V	0.29 A
360 V	0.28 A
370 V	0.27 A
380 V	0.26 A
390 V	0.26 A
400 V	0.25 A
410 V	0.24 A
420 V	0.24 A
430 V	0.23 A
440 V	0.23 A
450 V	0.22 A
460 V	0.22 A
470 V	0.21 A
480 V	0.21 A
490 V	0.20 A
500 V	0.20 A
510 V	0.20 A
520 V	0.19 A
530 V	0.19 A
540 V	0.19 A
550 V	0.18 A
560 V	0.18 A
570 V	0.18 A
580 V	0.17 A
590 V	0.17 A
600 V	0.17 A

Volts to Amps Conversion Formula

The formula for converting volts to amps is derived from Ohm’s Law:

I = V / R

Where:

• I is the current in amperes (A)
• V is the voltage in volts (V)
• R is the resistance in ohms (Ω)

Let’s say you have a 9V battery connected to a 3Ω resistor. To find the current:

I = V / R
I = 9V / 3Ω
I = 3A

How to Convert Volts to Amps

• Identify the voltage (V) of your power source
• Determine the resistance (R) of your circuit or device
• Apply the formula: I = V / R
• Calculate the result to get the current in amperes

Imagine you’re designing a circuit for an LED light. You have a 5V power supply and the LED has a forward voltage of 2V with a recommended current of 20mA (0.02A).

• Calculate the required resistor: R = (V_supply – V_LED) / I_LED
  R = (5V – 2V) / 0.02A
  R = 150Ω
• Now, to verify the current: I = V / R
  I = 5V / 150Ω
  I ≈ 0.033A or 33mA

This calculation shows that a 150Ω resistor will allow about 33mA to flow through the LED, which is safe but slightly higher than the recommended current.

How Many Amps in a 12 Volt Battery?

A 12V, 100Ah car battery can provide:

1A for 100 hours

10A for 10 hours

100A for 1 hour (theoretically)

Volts and Watts to Amps

To convert volts and watts to amps, we use the power equation:

P = V × I

Where:

• P is power in watts (W)
• V is voltage in volts (V)
• I is current in amperes (A)

Rearranging this equation, we get:

I = P / V

A 60W light bulb connected to a 120V power source:

I = P / V
I = 60W / 120V
I = 0.5A

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