Discount Factor Calculator: Quickly Calculate Present Value & Time Value of Money

Use the calculator by entering an annual rate (e.g., 7 %), the number of days (e.g., 540), and the future value (e.g., $12 500); the tool instantly returns the discount factor and present value. A 1 % change in the rate moves present value by roughly 0.9 % for one-year cash flows (Federal Reserve, 2023).