Electrical calculator
Capacitor Code Calculator
Decode ceramic capacitor markings to find capacitance value.
About the capacitor code calculator
The capacitor code calculator decodes the 3-digit marking on ceramic capacitors to find the capacitance value.
How to use this calculator
- 1
Enter the 3 digits
Enter the first two significant digits and the multiplier (number of zeros).
- 2
View results
See the capacitance in pF, nF, and µF.
How the calculation works
Capacitance = (digit1 × 10 + digit2) × 10^multiplier pF. Result shown in pF, nF, and µF.
Example: 104 = 10 × 10⁴ pF = 100,000 pF = 100 nF = 0.1 µF.
Safety first
These calculators provide estimates based on standard formulas and NEC guidelines. Always verify results with a licensed electrician before making installations. Electrical work can be dangerous — never work on live circuits, and always follow local building codes and regulations.
Understanding electrical units
Voltage (V) is electrical pressure, current (A) is flow rate, resistance (Ω) opposes flow, and power (W) is the rate of energy use. Ohm's law (V = I × R) relates the first three, while power formulas (P = VI, P = I²R) connect all four. Understanding these relationships is key to safe electrical design.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, market conditions, or individual circumstances. Results are for planning purposes only — consult a qualified professional for regulated, medical, financial, or construction decisions.
Frequently asked questions about capacitor code calculator
How accurate is the capacitor code calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.