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MIPS to Instruction Execution Time Converter

Convert between MIPS (million instructions per second) and average instruction execution time in nanoseconds. Also derive MIPS from clock frequency and CPI. Great for CPU performance study.

Input

Conversion direction

MIPS

Derive from clock frequency & CPI (optional)

MHz

Enter both and MIPS is calculated as clock frequency (MHz) ÷ CPI.

Result

Average instruction time (per instruction)

10ns

MIPS

100 MIPS

Average instruction time

10 ns

Instructions per second

100,000,000 instructions

Performance100 MIPS (million instructions/sec)
Average instruction time10 ns (= 0.01 μs)
Instructions per second100,000,000 instructions
RelationshipAvg instruction time (ns) = 1000 ÷ MIPS

How it works

  • MIPS measures processing performance as the number of instructions executed per second in millions, and the average instruction execution time (ns) is found with "1000 ÷ MIPS". For example, 100 MIPS equals 10 ns per instruction.
  • With "Instruction time → MIPS", the entered average instruction execution time (ns) is reversed into MIPS using "MIPS = 1000 ÷ time". The result updates in real time in either direction.
  • If you enter both clock frequency (MHz) and CPI (clocks needed per instruction), performance is calculated as "MIPS = clock frequency ÷ CPI". This takes priority over the MIPS / instruction-time field above.
  • The result also displays the number of instructions executed per second (the million-instructions-per-second value expanded to a full count), making the performance easier to picture.
  • The MIPS handled here is a theoretical figure that simply counts instructions. Real programs are affected by instruction types, memory access, pipelining and more, so values can differ from benchmark results.
  • Useful for checking the common "MIPS and instruction time conversion" and "deriving MIPS from clock frequency and CPI" calculations seen in computer fundamentals exams.

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