Calculator
Investing
Model what 30 years of contributions, returns, and rebalancing actually produces — transparent assumptions, no signup.
Investing math compounds in your favor or against you, depending on whether you understand the inputs. These calculators model the levers that matter most over decades: the contribution cadence, the rate of return, the portfolio mix, and the total cost-vs-benefit of a buy.
Compound Interest Calculator
Project long-term portfolio growth using principal, recurring contributions, and configurable compounding frequency.
Dollar Cost Averaging Calculator
Compare dollar-cost averaging and lump-sum investing with preset bull/bear/sideways/volatile paths or your own historical monthly prices.
Investment Return Calculator
Calculate total return, CAGR, and dollar gain from initial investment, final value, holding period, and dividends received.
Portfolio Allocation Calculator
Get a recommended split across US stocks, international stocks, bonds, and cash based on your time horizon and risk tolerance.