Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Financial
Loan Payment Calculator
Calculate the fixed monthly payment on an amortizing loan from the principal, annual interest rate, and loan term in years. Use it for car loans, student loans, personal loans, and small-business loans — anywhere you borrow a lump sum and pay it back in equal monthly installments over a fixed period.
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.
Key differences
| Loan Payment Calculator | Compound Interest Calculator | |
|---|---|---|
| Category | Financial | Economics |
| Inputs required | 3 | 3 |
| Result | Monthly Payment ($) | Final Amount ($) |
| What it does | Calculate the fixed monthly payment on an amortizing loan from the principal, annual interest rate, and loan term in years. Use it for car loans, student loans, personal loans, and small-business loans — anywhere you borrow a lump sum and pay it back in equal monthly installments over a fixed period. | 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. |