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555 Monostable Calculator

Calculate 555 monostable pulse time, timing capacitance or timing resistance.

  • Type: Electronics calculator
  • Formula: T ≈ 1.1 × R × C
  • Units: Engineering notation
  • Runs locally in your browser

555 monostable timing network

Select the value to calculate, then enter the remaining values.

Enter values and select Calculate.

Using the result

The calculator uses the ideal textbook relationship shown above. Real components have tolerance and practical circuits can introduce loading, leakage, bandwidth and other effects, so choose real component values with suitable margin for your design.

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