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IRR Calculator

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate internal rate of return (IRR) of an investment based on a series of cash flows that occur at regular time intervals. This IRR calculator works for annual, semi-annual, quarterly, monthly, weekly and daily cash flows.

Cash flow

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Result window

Android: Use this IRR calculator offline with our TVM financial calculator app.

IRR calculation

Internal rate of return is the interest rate corresponing to 0 net present value of an investment. We find the IRR by guessing a value and then using it to calculate the NPV with the cash flow data, and stop when NPV = 0.

See NPV calculator for the formula used in the calculation.

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