Free Investing Tools & Calculators

Plain-English calculators that show the math behind your money decisions. Free, no signup, every formula shown so you can check it.

Compound Interest

See how monthly contributions compound into real growth over time.

What a small expense-ratio difference costs you over decades.

The value of the "free money" your employer match leaves on the table.

Minimums, fees, and taxes compared for your starting amount.

The monthly number that gets you to your target, worked backward.

Which account wins based on your tax rate now vs in retirement.

Your debt's guaranteed interest vs expected investment returns.

The priority order: employer match first, then Roth vs traditional.

The on-track retirement check using the 4% rule.