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IRR Calculator

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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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