Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Personal Finance
Retirement Savings Calculator
Find out how much to save each month to hit a target retirement nest egg, given your current savings and years to retirement. Assumes a 7% annual return.
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
| Retirement Savings Calculator | Compound Interest Calculator | |
|---|---|---|
| Category | Personal Finance | Economics |
| Inputs required | 4 | 3 |
| Result | Monthly Savings Needed ($) | Final Amount ($) |
| What it does | Find out how much to save each month to hit a target retirement nest egg, given your current savings and years to retirement. Assumes a 7% annual return. | 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. |