Every calculator you need.
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From mortgages to macros to concrete slabs — clear answers with the working shown. Everything runs in your browser; nothing you type is stored or sent anywhere.
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Why ListCalc?
Most calculator sites make you trade speed for depth, or depth for a screen full of ads. ListCalc is built differently: every calculator loads instantly, computes as you type, and explains its own math — the formula, a worked example, and a field-by-field guide so you know exactly what to enter. Start with our mortgage calculator, which shows how much extra payments really save, generates a printable report, and exports your amortization schedule to CSV.
Your numbers never leave your device. There are no accounts, no tracking of what you calculate, and no "unlock full results" walls. New calculators ship every week across finance, health, math, construction, solar and more — the grid above shows what's live and what's coming next.