Joules to Amps Calculator

Summary

Convert energy in joules to electric current in amps using voltage and time with the formula I = E / (V × t).

How it works

1. Enter the energy value in joules (J).
2. Enter the voltage in volts (V).
3. Enter the time in seconds (s).
4. Click Calculate — the tool applies I = E / (V × t).
5. The result is displayed in amperes (A) alongside intermediate values.
6. Adjust any input and recalculate instantly.

Use cases

• Determine the average current drawn by a battery-powered device over a known discharge period.
• Size wiring and fuses when the energy budget and supply voltage are known.
• Verify motor or actuator current requirements from rated energy specifications.
• Convert capacitor energy (½CV²) discharge into an equivalent average current.
• Estimate charging current requirements for energy storage systems.
• Cross-check datasheet values when only energy and voltage are listed.
• Academic and homework problems involving electrical energy and charge.
• Quick sanity-check during circuit prototyping.

Frequently Asked Questions