Advanced tools for electronics engineers and hobbyists
Enter 3-digit code (e.g., 104, 472) or 2-digit code with multiplier (e.g., 4R7):
Enter value with unit (e.g., 10µF, 47nF, 1000pF):
Most ceramic capacitors use a 3-digit code:
Example: 104 = 10 × 10⁴ pF = 100,000pF = 100nF = 0.1µF
Electrolytic capacitors are usually marked with:
Some older capacitors may use color codes for voltage rating.
Enter capacitor values to calculate the equivalent capacitance in series.
The equivalent capacitance will be shown here.
Enter capacitor values to calculate the equivalent capacitance in parallel.
The equivalent capacitance will be shown here.
When capacitors are connected in series, the equivalent capacitance is calculated using:
1/Ceq = 1/C1 + 1/C2 + 1/C3 + ... + 1/Cn
This means the equivalent capacitance is always smaller than the smallest individual capacitor in the series.
When capacitors are connected in parallel, the equivalent capacitance is calculated by adding the individual capacitances:
Ceq = C1 + C2 + C3 + ... + Cn
This means the equivalent capacitance is always larger than the largest individual capacitor in the parallel connection.
Series connection: In series, the same charge must exist on each capacitor, but the voltage is divided across all capacitors. This effectively creates a single capacitor with increased plate separation, resulting in decreased capacitance.
Parallel connection: In parallel, each capacitor has the same voltage across it, but the charge is divided among all capacitors. This effectively creates a single capacitor with increased plate area, resulting in increased capacitance.
Additional tools for electronics engineers and advanced hobbyists.
Calculate the time constant (τ) of an RC circuit.
Time constant will be shown here.
Calculate the energy stored in a capacitor.
Energy will be shown here.