Official Formula: E = C x V^2 / 2
Visualization: Joules = Farad x (Voltage x Voltage) x 0,5
My approach: (Voltage x Voltage) x 0,5 -> Voltage-"Constant" to convert Farad into Joules for this Voltage-Class of Capacitors.
After that: VCo x Farad = Joules
Divide the Joules-Value by 3600 to convert into Watt-hours.
Example: 16V 2F Capacitor
Official: 2 x 16^2 / 2 = 2 x 256 /2 = 256J
My approach: 16 x 16 /2 = 128 Voltage-"Constant" for 16V capacitors. = 128 x 2F = 256J
This is easier, if you have to work with Capacitors of same Voltage but different Capacity, as the "Constant" is easier to remember and faster to punch into your calculator.
If i want to calculate Joules from a 16V 2200yf Cap, i just do this: 128 x 0,0022 = 0,2816J
16V 30F Supercap ? (just fiction, i did not look up if it exists) = 128 x 30 = 3840J ( divided by 3600) = 1.0667Wh
In my Case i was scrolling through a Supercap-Datasheet with multiple models and varying Capacity but Voltage was 2,8V on each one.
(2,8 x 2,8 /2 =3,92)
I got 3,92 as the 2,8V Capacitor Voltage-"Constant" and proof-calculated the Wh - Values.
On the 3000F Supercap it was 3,27Wh.
So: 3,92 x 3000 = 11760J ( divided by 3600) = 3,2666Wh
I know it is only 99% accurate in this case, but we just confirmed the Wh-Value.
400F Cap = 3,92 x 400 = 1568J (divided by 3600) = 0,43555Wh
Hope i could help.
Little minigame: Convert Fictional 9V 450F Supercap into Wh-Value !
There are 1,000,000 joules in a megajoule.
1 calorie is equivalent to 4.184 joules. Therefore, 19.8 calories would be equal to 82.8432 joules.
There are approximately 155 calories in 650 joules. One calorie is equivalent to about 4.184 joules.
A calorie is about 4.2 joules, therefore a kilocalorie is about 4200 joules. You can multiply by this number.
There are 3.6 million joules in one kilowatt-hour (kWh).
Farad
500K is 500 000 µ Farad so it's ½ a Farad
A Farad is the electrical unit of capacitance. Many commonly used capacitors (also known as condensors) are measured in micro-Farads (μF). A micro-Farad is one millionth of a Farad. To convert from micro-Farads to Farads, divide the micro-Farad value by one million. 2 micro-farads = 0.000002 Farads.
1 million
1000000 microfarad
farad is the unit for capacitance in SI system. If one volt is developed as one coulomb charge is placed then capacitance has to be one farad. But one farad is enormous large one so practically speaking we use only micro farad, nano farad and pico farad. They are respectively 10-6 F, 10-9 F and 10-12 F
A petajoule is 1015 joules (Quadrillion joules)
A pico farad is 1 x 10 minus 12 farads. That's 1 plus 11 zeros.
There are 56,000 joules in 56 kilojoules. This is because there are 1,000 joules in a kilojoule.
I read that it 500 rms to 1 Farad.
36.72 joules.
31.22 joules.