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.

Resistance
Capacitance
Send the result to an email


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

    where,

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