Investment calculators

Free tools for saving and long-term investing. The market calculators use real monthly prices; the others project growth from a return you choose.

• DCA Calculator

  See what investing a fixed amount every month would have grown to, with real prices for the S&P 500, Bitcoin and more.

• Lump Sum vs DCA

  Invest a sum all at once or spread it over months? Compare both with real prices and see how often each won.

• Compound Interest

  Watch a starting balance and monthly deposits grow, with any compounding frequency and in today’s dollars.

• Savings Goal

  How long until you reach a goal, or how much to save each month to get there by a date.

• FIRE & Coast FIRE

  Your FIRE number, the age you could retire early, and when you could stop saving and coast.

• 401(k) Calculator

  Your 401(k) at retirement with your contributions, employer match, raises and the IRS limits.

• Roth IRA Calculator

  Your tax-free Roth IRA at retirement within the IRS limits, and the tax it saves.

• Inflation Calculator

  What money from any month since 1913 is worth today, with official CPI data and real S&P 500 returns.

• SIP Calculator (India)

  Estimate the maturity value of a monthly SIP in rupees, with an optional yearly step-up.