Decode ceramic capacitor markings instantly with this free Ceramic Capacitor Code Calculator. Convert 3-digit, 4-digit, and EIA capacitor codes into capacitance values for PCB repair, electronics design, manufacturing, engineering, and education.
104 Standard Bypass (100 nF)
Decodes as 10 × 10^4 pF = 100,000 pF (100 nF). Typical coupling capacitor utilized on microcontroller power grids.
2R2 Sub-Pico Chip (2.2 pF)
The letter 'R' operates as a decimal point, resulting in 2.2 pF. Used in high-frequency RF tuned tanks.
S3 EIA-198 Code (4.7 nF)
EIA alphanumeric marking: 'S' maps to 4.7, multiplied by 10^3 pF, yielding 4,700 pF (4.7 nF).
A103 High-Voltage Core (10 nF, 10V)
EIA marking combining prefix 'A' (10V) with capacitance 103 (10 nF) in space-saving layouts.
Ceramic chip capacitors (MLCCs) consist of alternating layers of metallic electrodes and ceramic dielectric material. Due to their small package size, traditional printed textual values are replaced by EIA shorthand codes.
Understanding Class 1 (highly stable temperature-compensated dielectrics like C0G/NP0) versus Class 2 (high volumetric capacity but thermal-sensitive like X7R, Y5V) is essential for filtering and RF matching networks.
This light, self-contained calculator supports 3-digit coding, fractional picofarad codes, and EIA-198 classifications.
Using proper components ensures matching voltage coefficients and optimal ripple current handling in DC-DC converters and high-speed communication rails.
Class 1 capacitors (e.g., C0G, NP0) have zero voltage-dependent change and low drift over temperature, ideal for precision resonant loops. Class 2 capacitors (e.g., X7R, X5R) offer high density but exhibit changes under DC bias.
The character 'R' represents a decimal placement in Picofarads. For example, "4R7" indicates 4.7 pF.
If no tolerance character is printed on the core, default standard margins can range between ±10% and ±20% depending on the dielectric class.
Class 2 high-K ferroelectric materials suffer from a phenomenon known as DC bias effect, where the effective capacitance drops substantially as operating voltage approaches maximum ratings.
Ceramic Capacitor Code Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.