How to Calculate MIPS

By Athena Hessong

MIPS refers to the millions of instructions per second executed by a computer's processor. This number gives you an idea of the speed of a CPU, as faster processors have a higher MIPS than slower computers.

Things You'll Need

  • Processor's number of instructions per second
  • Execution time
  • Calculator
  • CPU processor speed (cycles per second)
  • CPI (average clock cycles per instruction)

Step 1

Divide the number of instructions by the execution time. For instance, if a computer completed 1 million instructions in 0.05 seconds, the calculation would be 1 million/0.05 = 20 million.

Step 2

Divide this number by 1 million to find the millions of instructions per second. For this example: 20 million/1 million = 20 MIPS.

Step 3

Alternatively, divide the number of cycles per second (CPU) by the number of cycles per instruction (CPI) and then divide by 1 million to find the MIPS. For instance, if a computer with a CPU of 600 megahertz had a CPI of 3: 600/3 = 200; 200/1 million = 0.0002 MIPS.