These are the main formulas that are needed to work with regular annuity cash flows (Definition/Tutorial). The formulas on this page were created with the free and open source application MathCast.
| To solve for | Formula |
|---|---|
| Future Value |  |
| Present Value |  |
| Periodic Payment when PV is known |
 |
| Periodic Payment when FV is known |
 |
| Number of Periods when PV is known |
 |
| Number of Periods when FV is known |
 |
| Discount Rate | Can only be calculated through a trial and error process |
| Variable | Definition |
|---|---|
| FV | Future Value |
| PV | Present Value |
| i | Discount Rate |
| N | Number of Periods |
| Pmt | Payment (per period) |
| ln | Natural logarithm function (log base e) |
