555 Timer Capacitor Calculator Astable

Astable Calculate C

This simple 555 timer calculator is for the astable circuit to calculate the capacitance C in farads. You must enter the values for the period T and resistors R1 and R2. The period value must be in seconds, and the resistor values in ohms.

1 µF0.000001 F
1 nF0.000000001 F
1 pF0.000000000001 F

Find Capacitance

R1 (Ω):


R2 (Ω):


Period (seconds):


Capacitance (F):




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