RC Time Constant & Cutoff
Calculate τ = R×C and cutoff frequency fc = 1/(2πRC)
RC Time Constant Calculator
The RC time constant defines how quickly a capacitor charges or discharges through a resistor. It is a fundamental concept in electronics, signal processing, and control systems.
This RC Time Constant Calculator helps compute the time constant and cutoff frequency of RC circuits.
What Is RC Time Constant?
The time constant (τ) is the time required for a capacitor to charge or discharge to approximately 63.2% of its final value.
RC Time Constant Formula
τ = R × C
Where:
• R = Resistance (ohms)
• C = Capacitance (farads)
The cutoff frequency of an RC circuit is:
fc= 1 / (2πRC)
Applications
• Signal filtering
• Timing circuits
• Pulse shaping
• Control systems
• Analog electronics