Financial Calculators
No signup required. Each one is a quick, standalone answer — for tracking everything in one place over time, the full app works the same way.
Retirement & Tax-Advantaged Accounts
HSA Triple Tax Advantage Calculator
See what tax-free contributions, growth, and withdrawals are worth in dollars for your HSA.
Roth vs. Traditional 401(k) Calculator
Project your real Traditional + Roth 401(k) balances and contribution split, and your breakeven tax rate for new money.
Mega Backdoor Roth Calculator
See your real after-tax 401(k) room under the 2026 $72,000 combined limit, and what delaying conversion costs you.
Coast FIRE Calculator
See your real Coast FIRE number, whether you've already hit it, and how a partial (not full) stop changes your timeline.
Home & Mortgage
Rent vs. Buy Net Worth Calculator
See your actual projected net worth if you buy vs. rent and invest the difference, across three home-appreciation scenarios — not just a breakeven year.
Mortgage Amortization & Loan Comparison Calculator
Compare two mortgage offers side by side with full amortization schedules for each, and see exactly when the better deal changes over the life of the loan.
Mortgage Equity & Payoff Calculator
See your real equity, PMI, and interest paid to date on your existing mortgage, then compare extra payments, biweekly, refinancing, and investing instead.