IRR vs Exit Multiple Calculator Calculate IRRCalculate Exit/Return MultipleExit/Return Multiple:IRR: Time (years): Calculate IRREnter values above and click "Calculate"Check out our blog post for a detailed explanation of IRR and exit/return multiples.Frequently Asked Questions What is the difference between Internal Rate of Return (IRR) and exit or return multiples? Check out our blog post for a detailed explanation of IRR and exit/return multiples. Essentially, IRR not only includes the return multiple, but also brings in the element of time.