Personal Finance
Compound Interest Calculator
Compound interest future value and interest earned.
Free to use — no sign-up or login.
Future value
Interest earned
Amortization schedule
| # | Date | Payment | Principal | Extra | Interest | Balance |
|---|---|---|---|---|---|---|
This free Compound Interest Calculator covers Compound interest future value and interest earned.
Compound interest reinvests earned interest into the balance. Related personal finance tools sit beside How it works, with no account required.
Using the Compound Interest Calculator
Compound interest future value and interest earned. Typical inputs are Principal ($), Annual rate (%), Years and Compounds per year. How it works beside the form states the identity the Compound Interest Calculator applies.
Worked example
Principal $5,000 at 4% annual for 10 years, compounded monthly (m = 12): A = 5000×(1 + 0.04/12)^(12×10) ≈ $7,450. Interest earned ≈ $2,450. More frequent compounding raises A slightly versus annual compounding at the same nominal rate.
\[ A=5000\left(1+\frac{0.04}{12}\right)^{120}\approx 7450 \]
FAQ
Does this include regular deposits?
No—this future-value formula assumes a single principal with no additional contributions. For monthly deposits, use a future-value-of-annuity / savings calculator instead.
Sources
Assumptions and limitations
Personal finance figures are illustrative. Taxes, insurance, fees, and lender overlays are omitted unless a field names them. This is not financial advice.
Nominal annual rate is converted as r/m per period. Taxes and fees are omitted.