Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Investing
Present Value Calculator
Calculate the present value of a future amount given a discount rate and time period — the dollar amount today that is mathematically equivalent to a future payment. Use it for bond pricing, investment valuation, lottery payout comparisons, and any decision that requires comparing money at different points in time.
Fill in the required fields to see your result.
Economics
Compound Interest Calculator
Project the future value of a lump-sum investment when interest is reinvested each year using A = P · (1 + r)ᵗ. The simplest compounding model — assumes annual compounding, a constant rate, and no additional contributions or withdrawals.
Fill in the required fields to see your result.
Key differences
| Present Value Calculator | Compound Interest Calculator | |
|---|---|---|
| Category | Investing | Economics |
| Inputs required | 3 | 3 |
| Result | Present Value ($) | Final Amount ($) |
| What it does | Calculate the present value of a future amount given a discount rate and time period — the dollar amount today that is mathematically equivalent to a future payment. Use it for bond pricing, investment valuation, lottery payout comparisons, and any decision that requires comparing money at different points in time. | Project the future value of a lump-sum investment when interest is reinvested each year using A = P · (1 + r)ᵗ. The simplest compounding model — assumes annual compounding, a constant rate, and no additional contributions or withdrawals. |