Convert coulombs to joules by multiplying charge by voltage (E = QV), or work back from joules to coulombs or volts, with mC, kV and Wh units.
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Coulombs To Joules Formula
The following formula is used to calculate the energy in joules from charge in coulombs.
Variables:
- E is the energy in joules (J)
- Q is the charge in coulombs (C)
- V is the potential difference in volts (V)
For charge transferred across a constant potential difference, calculate signed energy in joules by multiplying coulombs by volts. Charge alone cannot be converted to energy. This relationship is not the total energy stored while charging a capacitor. This is because one joule is equivalent to one coulomb-volt. This conversion is fundamental in the study of electricity and electronics.
| Charge (C) | Voltage (V) | Energy (J) |
|---|---|---|
| 0.001 | 5 | 0.005 |
| 0.010 | 5 | 0.050 |
| 0.100 | 5 | 0.500 |
| 0.500 | 1.5 | 0.750 |
| 1.000 | 1 | 1.000 |
| 1.000 | 12 | 12.000 |
| 2.000 | 3.7 | 7.400 |
| 2.000 | 12 | 24.000 |
| 3.000 | 5 | 15.000 |
| 5.000 | 9 | 45.000 |
| 5.000 | 12 | 60.000 |
| 10.000 | 5 | 50.000 |
| 10.000 | 12 | 120.000 |
| 0.050 | 230 | 11.500 |
| 0.100 | 120 | 12.000 |
| 0.200 | 24 | 4.800 |
| 0.750 | 3.7 | 2.775 |
| 1.500 | 9 | 13.500 |
| 4.000 | 12 | 48.000 |
| 20.000 | 5 | 100.000 |
| * Rounded to 3 decimals. Uses E = Q × V. Illustrative constant potential differences only; nominal AC RMS voltage cannot generally be substituted for an arbitrary charge transfer. Battery and USB voltages depend on device and conditions. Note: 1 C × 1 V = 1 J. | ||
What is Coulombs To Joules?
Coulombs to joules is a conversion relating to the units of electrical charge (coulombs) to energy (joules). This conversion is typically used in the context of electrical circuits or systems, where the energy of a system (in joules) is calculated by multiplying the charge (in coulombs) by the potential difference (in volts). Therefore, one joule is equivalent to one coulomb-volt. This conversion is fundamental in the study of electricity and electronics.
How to Calculate Coulombs To Joules?
The following steps outline how to calculate the Coulombs To Joules using the formula E = Q * V.
- First, determine the charge in coulombs (Q).
- Next, determine the potential difference in volts (V).
- Next, gather the formula from above = E = Q * V.
- Finally, calculate the energy in joules (E).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
charge in coulombs (Q) = 5
potential difference in volts (V) = 10
