Capacitors In Parallel Calculator

Summary

Capacitors in parallel add directly: C_total = C1 + C2 + … + Cn. Enter 2 to 10 capacitor values across units from picofarads (pF) to farads (F) to calculate total equivalent capacitance, view full unit conversions, and verify circuit charge storage instantly in your browser.

How it works

1. Select the number of parallel capacitors (between 2 and 10) from the dropdown.
2. Enter each capacitor's numerical value and select its measurement unit: picofarads (pF), nanofarads (nF), microfarads (µF), millifarads (mF), or farads (F). Any blank rows are automatically skipped.
3. The tool converts each branch to farads (F) using standard metric scaling (for example, 1 µF = 1e-6 F) and calculates the direct sum: C_total = C1 + C2 + … + Cn.
4. Worked example: If C1 = 10 µF (10 × 10⁻⁶ F), C2 = 470 nF (0.47 × 10⁻⁶ F), and C3 = 2.2 µF (2.2 × 10⁻⁶ F), the total capacitance is 10 + 0.47 + 2.2 = 12.67 µF (1.267 × 10⁻⁵ F or 12,670 nF).
5. Click Calculate to view the primary result in the most readable unit, an all-unit conversion table (pF, nF, µF, mF, F), and an input summary. Click Copy Result to copy the primary value.

Use cases

• Power supply decoupling: Paralleling a 10 µF bulk capacitor with a 100 nF ceramic capacitor to filter both low-frequency and high-frequency rail noise.
• Synthesizing non-standard values: Combining standard E12 or E24 capacitor values in parallel to achieve an exact target capacitance without custom orders.
• Reducing equivalent series resistance (ESR): Paralleling multiple smaller capacitors in switching power supplies to share ripple current and reduce thermal stress.
• Energy storage bank sizing: Summing parallel supercapacitors or electrolytic banks to evaluate total stored energy via E = 0.5 × C_total × V².
• Classroom and laboratory verification: Validating textbook circuit theory exercises and breadboard component networks.

Frequently Asked Questions