Stored energy
Energy (J)
0.006 J
Energy (Wh)
0.00 mWh
Charge
0.002 C
Capacitor energy
See how much hold-up time your bulk caps really buy.
Applies the E = ½·C·V² energy relationship to show stored energy and charge inside a capacitor with unit-aware inputs and safety callouts.
0.006 J
Energy
0.002 C
Charge
5.00 V
Voltage
Common stacks
Use presets to compare bypass, bulk, and energy-storage roles quickly.
Inputs
V
Ride-through budget
Energy translates to 0.001 Ws at 5 V rails—use to size brownout hold-up.
Safety tip
Double-check voltage derating: keep steady-state ≤ 80% of capacitor rating for reliability.
Design notes
- For backup supplies, divide stored energy by system load (W) to estimate hold-up time.
- Supercapacitors have high leakage—budget quiescent loss in energy calculations.
- Series supercaps need balancing resistors; deduct their loss from available energy.
Export energy numbers into your UPS/brownout spreadsheet to keep BOM sizing aligned.