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555 Timer (Astable)

Calculate 555 Timer (Astable) instantly with the exact formula and a worked example.

555 Timer (Astable)

R1, kΩ
R2, kΩ
C, µF
f
48Hz
Calculate 555 Timer (Astable) instantly with the exact formula and a worked example.

More about: 555 Timer (Astable)

What it calculates

The “555 Timer (Astable)” calculator computes f in Hz from 3 parameters: r1, kω, r2, kω, c, µf.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters R1, kΩ = 10, R2, kΩ = 10, C, µF = 1 the result is 48 Hz.

How to use

  1. Enter r1, kω, r2, kω and c, µf — each field above is adjustable with a slider.
  2. f (Hz) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is 555 Timer (Astable) calculated?
The 555 Timer (Astable) calculator computes f (in Hz) from r1, kω, r2, kω, c, µf. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the 555 Timer (Astable) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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