RC Time Constant Calculator
Find the RC time constant (τ) by multiplying resistance and capacitance.
CalcSimpler Examples
- 1000 Ω & 0.001 F ⇒ 1 s
- 4700 Ω & 0.00047 F ⇒ 2.21 s
FAQ
What is the time constant?
The time it takes for voltage to reach about 63% of its final value.
Can I use kilo-ohms and microfarads?
Yes, convert units so resistance is in ohms and capacitance in farads.
Does this account for inductance?
No, it applies only to RC circuits.
Why is τ important?
It predicts charging and discharging speed of capacitors.
Additional Information
- Higher resistance or capacitance increases the time constant.
- After 5τ, charging is over 99% complete.
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