interestClassic tool
Compound Interest Calculator
Simulate compound interest with an initial deposit, monthly contribution and rate.
Fill in the starting amount, monthly contribution, interest rate and investment period to estimate how your balance can grow over time. The tool helps with financial planning, goal setting, investing comparisons and quick long-term scenario checks.
It also separates how much you invested from how much came from returns, which makes the compound growth effect easier to understand without building a spreadsheet first.
Use clear inputs to get a more useful result.