Compound Interest Calculator

Free compound interest calculator: project future value from principal, monthly contributions, rate, years, and compounding frequency, with total interest earned.

Compound interest calculator showing future value growth over time

Investment notice: This compound interest calculator assumes a fixed annual rate and steady contributions—it does not model market volatility, taxes on gains, fees, or inflation. Past hypothetical returns are not guarantees of future performance.

Summary: Enter initial principal, monthly contribution, annual interest rate, years, and compounding frequency. You get future value, total contributions, interest earned, and a horizon scenario table for 10–40 years.

Compound Interest Calculator

Use this compound interest calculator to project how regular savings and an initial lump sum grow over time when earnings are reinvested at a steady annual rate.

Growth assumptions

Results will appear here.