Capacitor Calculator

Calculate capacitor impedance and time constant

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How to Use Capacitor Calculator

Enter capacitance

Enter capacitance value (µF, nF, pF).

Enter frequency

Enter frequency for impedance calculation.

View results

See impedance and time constant with R.

Why Choose AllTools Capacitor Calculator?

  • ✓ Impedance (Xc)
  • ✓ RC time constant
  • ✓ Unit conversion
  • ✓ Series/parallel
  • ✓ Reactance formula
  • ✓ No data stored

Related Resources

Voltage divider → Ohms law → Convert units →

Frequently Asked Questions

What is RC time constant? ▼
τ = R × C. It is the time to charge to 63.2% or discharge to 36.8% of the voltage.
What is capacitive reactance? ▼
Capacitive reactance (Xc) is the opposition a capacitor offers to AC current. It decreases as frequency increases: Xc = 1/(2*pi*f*C).
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.

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