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CPU Instruction Execution Time from CPI and Clock Rate Calculator

How long a program takes given CPI, instruction count, and clock.

Calculates CPU execution time = (instruction count × CPI) / clock_frequency, and MIPS = clock_frequency / (CPI × 10⁶).

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

instructions
GHz

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Time = IC × CPI / f; MIPS = f / (CPI × 10⁶)

In depth

Calculates CPU execution time = (instruction count × CPI) / clock_frequency, and MIPS = clock_frequency / (CPI × 10⁶).