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Plain-language arithmetic

Interactive financial models for everyday decisions

Run real numbers for your take-home pay, debt payoff timelines, and household reserves. All calculations run locally in your browser with zero data harvesting.

Four core models

Calculated locally, explained plainly

Model 01

Take-home pay breakdown

Isolate federal withholding, FICA, pre-tax health deductions, and net monthly cash flow from your gross salary figures.

Model 02

Debt snowball timeline

Compare minimum payments against fixed monthly surpluses to project exact payoff dates across multiple loan accounts.

Model 03

Emergency cash buffer

Calculate essential monthly baseline expenses versus liquid savings reserves to determine your true runway in months.

Model 04

Rent-to-income ratio

Evaluate housing costs against net monthly take-home figures using conservative 30% thresholds without hidden fees.

Formula transparency

Every calculator relies on published tax brackets and standard amortization formulas executed entirely in your browser. We never log, store, or sell your personal financial figures.

Plain Ledger Calculation Standards

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Match your numbers on paper

Download our printable PDF worksheets formatted for physical binders or digital tablets.