Interactive calculators for smarter financial decisions
Free, open-source tools to help you plan, project, and optimize your financial future.
Interactive projections with two-person support, tax modeling, Social Security timing, healthcare costs, and advanced account breakdown.
Open toolPractice trading with virtual cash. Each trade is $1,000 — search stocks, track positions, and see if you can time the bottom.
Open toolSee how your savings snowball over time. Enter your starting balance, monthly savings, and expected return to visualize invested vs. growth.
Open toolEnter a loan amount, interest rate, and term to instantly see your monthly payment, total interest, and a full amortization schedule.
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