Joule to Volt Calculator
Convert energy in joules (J) to voltage in volts (V).
Joule to Volt Converter
Common Joule to Volt Conversions
Click on these links to see instant conversions with common values:
Understanding Joule to Volt Conversion
Converting energy in joules (J) to voltage (V) involves understanding the relationship between energy, charge, and electric potential.
Conversion Formula
Volts (V) = Joules (J) / Coulombs (C)
Where:
• V = Voltage in Volts
• J = Energy in Joules
• C = Electric Charge in Coulombs
Where:
• V = Voltage in Volts
• J = Energy in Joules
• C = Electric Charge in Coulombs
Key Concepts
- Joule (J): The SI unit of energy.
- Volt (V): The unit of electric potential difference.
- Coulomb (C): The SI unit of electric charge. One coulomb is the amount of charge transported by a constant current of one ampere in one second.
Typical Energy and Charge Values
| Scenario | Energy (Joules) | Charge (C) | Approx. Voltage (V) |
|---|---|---|---|
| AA Battery (full) | 8100 | 5400 (1500 mAh) | 1.5 |
| Car Battery (starting) | 12000 | 1000 | 12 |
| Smartphone Battery (full) | 39960 | 10800 (3000 mAh) | 3.7 |
| Lightning Bolt | 1,500,000,000 | 15 | 100,000,000 |
Frequently Asked Questions
What is the relationship between energy, charge, and voltage?
Voltage is defined as the energy per unit charge. Therefore, if you know the total energy (Joules) and the amount of charge (Coulombs), you can calculate the voltage.
Can I convert joules to volts without knowing the charge?
No, you cannot directly convert joules to volts without knowing the amount of electric charge involved. Voltage is a measure of potential energy per unit charge, so to find the voltage, you need both energy and charge.