online electronic calculator - Ohm's law and much more

Capacitor energy calculator

Online calculator for formulas used in electronic circuit design and electrical engineering.

Basic electric calculations:

Ohm's Law, Ohm's Law with power, DC power, AC real power, LC resonant frequency, Capacitor charging/discharging, Capacitive reactance, Capacitive current + reactive power, Capacitor energy, Capacitor Δ energy, RC discharging, Inductor square pulse, Inductive reactance, Inductive current + reactive power, Inductor energy, 2 parallel resistors, 3 parallel resistors, System bandwidth

Wire and winding calculations:

Diameter ↔ cross section ↔ AWG, Wire resistance, Wire weight, Current density, Wire R thermal drift

Calculate Capacitor energy: 10uF, 5V, J


Energy stored in a capacitor. You can calculate the energy knowing the capacitance and the voltage the capacitor is charged to. You can also calculate the capacitance necessary to store a desired amount of energy at a given voltage, or the voltage at which a given capacitance stores a desired amount of energy.   E = ½ C.V2   formula.

Enter any 2 values, the 3rd field will be calculated:

Capacitance: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Voltage: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Energy: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Output metric prefix:   Automatic    User-selected
 

Standard EIA Decade Values of capacitors - decade 10 to 100 uF

E6E12E24
10 uF
15 uF
22 uF
33 uF
47 uF
68 uF
10 uF, 12 uF
15 uF, 18 uF
22 uF, 27 uF
33 uF, 39 uF
47 uF, 56 uF
68 uF, 82 uF
10 uF, 11 uF, 12 uF, 13 uF
15 uF, 16 uF, 18 uF, 20 uF
22 uF, 24 uF, 27 uF, 30 uF
33 uF, 36 uF, 39 uF, 43 uF
47 uF, 51 uF, 56 uF, 62 uF
68 uF, 75 uF, 82 uF, 91 uF

Other capacitance decades:

1 - 10 pF, 10 - 100 pF, 100 - 1000 pF, 1 - 10 nF, 10 - 100 nF, 100 - 1000 nF, 1 - 10 uF, 10 - 100 uF, 100 - 1000 uF, 1 - 10 mF, 10 - 100 mF, 100 - 1000 mF, 1 - 10 F, 10 - 100 F, 100 - 1000 F, 1 - 10 kF, 10 - 100 kF, 100 - 1000 kF,

Some common voltages:

Alkaline
Zinc-Carbon
NiMH, NiCd
rechargeable
Li-Ion
3.6V
Li-Ion
3.7V
Li-Ion
full 4.2V
LiFePO4
(LFP) 3.2V
Lead-acid
battery
Power
supply
1-cell: 1.5V
2-cell: 3V
3-cell: 4.5V
4-cell: 6V
5-cell: 7.5V
6-cell: 9V
7-cell: 10.5V
8-cell: 12V
9-cell: 13.5V
10-cell: 15V
11-cell: 16.5V
12-cell: 18V
1-cell: 1.2V
2-cell: 2.4V
3-cell: 3.6V
4-cell: 4.8V
5-cell: 6V
6-cell: 7.2V
7-cell: 8.4V
8-cell: 9.6V
9-cell: 10.8V
10-cell: 12V
11-cell: 13.2V
12-cell: 14.4V
1-cell: 3.6V
2-cell: 7.2V
3-cell: 10.8V
4-cell: 14.4V
5-cell: 18V
6-cell: 21.6V
7-cell: 25.2V
8-cell: 28.8V
9-cell: 32.4V
10-cell: 36V
11-cell: 39.6V
12-cell: 43.2V
1-cell: 3.7V
2-cell: 7.4V
3-cell: 11.1V
4-cell: 14.8V
5-cell: 18.5V
6-cell: 22.2V
7-cell: 25.9V
8-cell: 29.6V
9-cell: 33.3V
10-cell: 37V
11-cell: 40.7V
12-cell: 44.4V
1-cell: 4.2V
2-cell: 8.4V
3-cell: 12.6V
4-cell: 16.8V
5-cell: 21V
6-cell: 25.2V
7-cell: 29.4V
8-cell: 33.6V
9-cell: 37.8V
10-cell: 42V
11-cell: 46.2V
12-cell: 50.4V
1-cell: 3.2V
2-cell: 6.4V
3-cell: 9.6V
4-cell: 12.8V
5-cell: 16V
6-cell: 19.2V
7-cell: 22.4V
8-cell: 25.6V
9-cell: 28.8V
10-cell: 32V
11-cell: 35.2V
12-cell: 38.4V
1-cell: 6V
2-cell: 12V
3-cell: 18V
4-cell: 24V
5-cell: 30V
6-cell: 36V
7-cell: 42V
8-cell: 48V
9-cell: 54V
10-cell: 60V
11-cell: 66V
12-cell: 72V
1.8V
2.5V
3V
3.3V
5V
6V
9V
12V
15V
18V
24V
48V

Capacitor energy formula says:

•A 10uF (ten microfarads) capacitor charged to 5V (five volts) holds 125uJ (one hundred and twenty-five microjoules) of energy.
•To store 125uJ (one hundred and twenty-five microjoules) of energy in a capacitor at 5V (five volts), its capacitance has to be 10uF (ten microfarads).
•If a 10uF (ten microfarads) capacitor had to store 125uJ (one hundred and twenty-five microjoules) of energy, you'd have to charge it to 5V (five volts).



This is a simple online calculator for formulas used in electronic engineering and design.

This online calculator is for reference only. I do not guarantee it to work correctly. You use this at your own risk only.