Free tool
Investment Calculator
Four calculators for the arithmetic behind long-term investing: compounding, retirement runway, realised returns and dollar-cost averaging. Results update as you type.
Future value—
Total contributed—
Interest earned—
Projected nest egg at retirement—
Years until retirement—
Total contributed—
Annual income needed (inflation-adjusted)—
How long the savings last—
CAGR (on initial capital)—
Total gain—
Total return on all money in—
Simple annualised return—
Total contributed—
DCA final value——
Lump sum final value (same total, invested on day one)——
Total invested—
Average purchase price—
Units accumulated—
The price path is a deterministic simulation with the volatility you set. It illustrates the mechanics of averaging, not a forecast.