Amps to Joules Calculator

Summary

Calculate energy in joules from current (A), voltage (V), and time (s) using E = I × V × t.

How it works

1. Enter the current in amperes (A).
2. Enter the voltage in volts (V).
3. Enter the time in seconds (s).
4. The calculator applies E = I × V × t and displays the result in joules (J).
5. Additional conversions (kJ, Wh, kWh) are shown for convenience.
6. Use the Reset button to start a new calculation.

Use cases

• Calculate the energy stored in or delivered by a battery during discharge.
• Estimate heat generated by a resistive element over a set duration.
• Size capacitor banks based on required joule output.
• Verify energy consumption of appliances over a timed interval.
• Determine weld energy in resistance welding systems.
• Calculate energy delivered by a defibrillator pulse.
• Design motor drive systems based on acceleration energy.
• Estimate energy use of LED lighting rigs during production runs.

Frequently Asked Questions