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Scientific, graphing, financial, and converter tools all in your browser — nothing to install, ever.
Prime Calculator
Every calculator you need — scientific, graphing, financial, and more. Free, private, no sign-ups required.
Built for Learners
Keyboard shortcuts, clean layout, and clear labels keep homework and study sessions moving fast.
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Everything runs in your browser. No accounts, no tracking, no cookies — your calculations stay yours.
Featured Tools
These are the calculators our community uses the most.
Scientific Calculator
Advanced keypad with functions, constants, and keyboard shortcuts.
Graphing Calculator
Plot equations, zoom, and analyze intercepts in an interactive canvas.
BMI Calculator
Check your BMI category with instant feedback and healthy ranges.
Financial Suite
Loan, interest, time value, and cashflow tools bundled together.