Compound Interest Calculator
Project a balance forward from a starting amount, an interest rate and regular contributions, with a year-by-year breakdown.
Calculate compound growth
Investing Calculators
Compound growth and annualised returns over long horizons.
Compounding is the mechanism behind most long-horizon financial arithmetic, and it is genuinely difficult to estimate intuitively — the gap between a 5% and a 7% annual return over thirty years is far larger than the gap between the rates suggests.
These calculators make that concrete. Compound interest projects a balance forward from a starting amount and regular contributions. CAGR runs the same relationship backwards: given where a value started and finished, it finds the single annual rate that connects them. The same mathematics underpins the account growth calculator in the trading section.
Both are projections from the numbers you enter. Real returns vary year to year, and a smooth compounding curve is a modelling convenience rather than a description of how any market behaves.
All investing calculators
2 calculators in this category.
CAGR Calculator
Calculate the compound annual growth rate between a starting and ending value over a number of years.
Calculate CAGR