555 Timer Calculator

Online calculator for finding the 555 Timer based on input parameters of resistance and capacitance.

This 555 Timer calculator helps calculate the delay and timeout in a monostable circuit by using resistance and capacitance values. The IC 555 timer is commonly used in stable and monostable circuits where the output voltage becomes high for a set duration when a falling edge is detected on the trigger pin. A monostable circuit times only once when switched on and stops thereafter. To restart the circuit, it needs to be switched on manually again.

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    10 Number of calculations
    T = 1.1 \times R \times C


    • R = Resistance
    • C = Capacitance
    • T = Time Out Delay