Calculators and utilities.

Trump

• Trump Account Modeler

  Lump-sum Trump funding

  Size a brokerage setaside to fund statutory Trump contributions for one or more children.

Brokerage

• Brokerage Modeler

  Making trust fund kids since 2026

  Project a child's year-by-year gifts to ages 18–65, or a constant annual contribution for a set horizon.

• Pot Trust Modeler

  One pot, many kids

  Seed a communal pot with one lump; size for a maturity value or see what the pot pays at each child’s target age.

• Growth Factor Table

  Time × rate, no $

  Real compounding multiples from year 0 to 67 — milestone ages and contribution years, no dollar amounts required.

Retirement

• RMD Calculator

  IRA · 401(k) · 403(b) · TSP

  Owner lifetime required minimum distributions — Uniform Lifetime factor, per-plan aggregation, still-working exception, and a balance projection.

Treasuries

• Treasury Bills

  Auction calendar & curve

  Next bill auction, the last investment rate, and the nearest Treasury curve point.

• TIPS Catalog

  Yield curve & quotes

  Real YTM vs maturity for tradeable TIPS from tipsladder.com — scatter chart, catalog table, and annual coupon dollars on current principal.

Tax

• Federal Tax Calculator

  1040-shaped estimate

  Federal income tax estimate for 2025 or 2026 — AGI, brackets, NIIT, and Social Security taxability. All math runs in your browser.

Estate planning

• Trust explorer

  Job first, then add-ons

  Start from what you want a trust to do — descendants for generations, a special-needs child, spouse then kids — and see the locked core plus what you can still add.

Oddities

• Illinois Estate Tax Modeler

  WTF, Illinois?

  Estimate Illinois estate tax from tentative taxable estate, gifts, and situs (AG calculator parity).

• Sourdough Calculator

  Baker's % to grams

  Flour, hydration, salt, and levain — get preferment and dough weights.