Calculate 555 timer frequency and duty cycle.
In astable mode the 555 timer generates a continuous square wave using two resistors and one capacitor.
The calculator applies the formula above to the values entered in the form and returns the calculated engineering result instantly.
This mode is used for clocks, blinkers, tone generators, PWM-like signals and simple timing circuits.
This online calculator is intended for fast engineering estimates. For production hardware, verify the result with datasheets, manufacturer recommendations and real measurements.
Calculate 555 timer frequency and duty cycle. This tool is designed for fast electronics engineering estimates directly in the browser.
Enter the known values, press Calculate and compare the result with your design requirements. For reliable hardware, always check component datasheets, tolerances, temperature limits and manufacturer recommendations.
Is this calculator suitable for production design?
It is useful for estimates and early design work. Final production designs should be verified with real measurements and datasheets.
Does the calculator work on mobile?
Yes. EngiCalc tools are lightweight, responsive and designed to work on desktop and mobile devices.