Enter the total voltage, the total current, and the total time (use the unit selectors for seconds/minutes/hours) into the calculator to determine the energy.
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Energy from Voltage Formula
The following equation is used to calculate the Energy from Voltage.
E = V \cdot I \cdot t
- Where E is the energy (joules, J)
- V is the total voltage (volts)
- I is the total current (amps)
- t is the total time (seconds)
To calculate the energy, multiply the voltage by the current and time (this assumes constant values, such as DC; for AC real energy, use RMS values and include power factor: E = Vrms × Irms × pf × t).
| Voltage (V) | Current (A) | Time (s) | Energy (J) | Energy (Wh) |
|---|---|---|---|---|
| 5 | 1 | 3600 | 18000 | 5.000 |
| 5 | 2 | 3600 | 36000 | 10.000 |
| 9 | 0.5 | 3600 | 16200 | 4.500 |
| 9 | 2 | 600 | 10800 | 3.000 |
| 12 | 1 | 1800 | 21600 | 6.000 |
| 12 | 5 | 60 | 3600 | 1.000 |
| 12 | 0.5 | 900 | 5400 | 1.500 |
| 19 | 3 | 3600 | 205200 | 57.000 |
| 24 | 1 | 3600 | 86400 | 24.000 |
| 24 | 5 | 600 | 72000 | 20.000 |
| 48 | 2 | 3600 | 345600 | 96.000 |
| 48 | 1 | 900 | 43200 | 12.000 |
| 120 | 2 | 600 | 144000 | 40.000 |
| 120 | 0.5 | 3600 | 216000 | 60.000 |
| 230 | 1 | 3600 | 828000 | 230.000 |
| 230 | 0.5 | 1800 | 207000 | 57.500 |
| 240 | 1 | 3600 | 864000 | 240.000 |
| 277 | 1 | 3600 | 997200 | 277.000 |
| 3.7 | 2 | 3600 | 26640 | 7.400 |
| 400 | 0.2 | 3600 | 288000 | 80.000 |
| Energy is calculated as E = V × I × t, where V in volts, I in amps, t in seconds. 1 Wh = 3600 J. | ||||
How to Calculate Energy from Voltage?
The following example problems outline the steps and information needed to calculate the Energy from Voltage.
Example Problem #1
- First, determine the total voltage (volts). In this example, the total voltage (volts) is determined to be 30.
- Next, determine the total current (amps). For this problem, the total current (amps) is measured to be 4.
- Next, determine the total time (seconds). In this case, the total time (seconds) is found to be 2.
- Finally, calculate the Energy from Voltage using the formula above:
E = V × I × t
Inserting the values from above and solving the equation yields:
E = 30 × 4 × 2 = 240 (Joules)
Example Problem #2
Using the same method as above, first, we need to measure or determine the variables required by the equation. For this example problem, these are provided as follows:
total voltage (volts) = 2
total current (amps) = 40
total time (seconds) = 4
Enter these given values into the calculator above yields:
E = 2 × 40 × 4 = 320 (Joules)
