Capacitor Code Calculator
This calculator helps you determine the value of capacitors marked with numeric codes. Many ceramic and film capacitors use a 3-digit code to indicate their value in picofarads (pF), where the first two digits are the significant figures and the third digit is the multiplier (power of 10).
How to use: Enter your capacitor code in any field (pF, nF, or µF) and the calculator will automatically convert between units. For coded values (like "104"), use the Capacitor Code field.
Calculated Value:
Interpretation:
Enter a value in any field to see conversions.
Common Capacitor Code Examples:
Understanding Capacitor Codes
Capacitor code calculators are essential tools for electronics engineers, technicians, and hobbyists working with surface mount (SMD) or ceramic disc capacitors. These small components often use numeric codes rather than writing the full value due to space constraints.
How Capacitor Coding Works
The most common coding system uses 3 digits where:
- First two digits: Significant figures of the capacitance value
- Third digit: Multiplier (power of 10)
- Units: Always in picofarads (pF) for coded values
For example, a capacitor marked "104" translates to 10 × 104 pF = 100,000pF = 100nF = 0.1µF. Our calculator automatically handles these conversions between pF, nF, and µF units.
Special Cases
Some capacitors may use different marking systems:
- 2-digit codes: Direct value in pF (e.g., "22" = 22pF)
- Codes ending with 0: Could be direct value or coded (e.g., "100" could be 10pF or 100pF)
- Alphanumeric codes: Some capacitors use letter-number combinations
- EIA codes: Some manufacturers use industry-standard codes
Always consult the capacitor datasheet when in doubt, especially for critical applications. Our capacitor code calculator provides quick conversions but may not cover all manufacturer-specific coding systems.