Financial tools
Standalone calculators that run entirely in your browser - nothing you enter leaves your device. They complement the retirement planner: where the planner models your whole financial life, each tool answers one specific money question well.
What a car really costs to buy, drive on one long trip, and sell again - and whether selling a box spread beats the auto loan.
How much to set aside in an account to raise a child to 18: age-banded yearly costs with inflation and investment growth, as a lump sum today or a level monthly contribution.
Pay the house off early, or pay it down to the $750k deduction cap and invest the rest: months and interest saved, in today's dollars.
Size each year's Roth conversion, see when the rungs unlock, point them at the mortgage, and work out what you live on during the five-year wait.
Every subscription, bill and yearly fee in one list: monthly and yearly totals by category, an inflation projection, and a month-by-month burn-down of your cash against it.
A century of daily market data, fully offline: browse indexes, S&P sectors, gold and CPI, compare them rebased, and replay any buy/sell list against inflation, gold, or the S&P 500.