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IRR Estimate — result sheet
Internal rate of return from a cash-flow series.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: 0 = Σ CFt/(1+r)^t; bisection on NPV.
IRR is the discount rate zeroing NPV. Bisection brackets the root between −99.9% and 10000% over 200 rounds.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Cash flows — Comma-separated, earliest first; include one inflow and one outflow.
Worked example
| Input | Value |
|---|---|
| Cash flows | -10000, 3000, 4000, 5000 |
IRR about 8.90%; NPV at IRR about $0.
Assumptions and limits
- Equal periods; first flow at time zero.
- One sign change gives one real IRR.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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