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Calculate percentage increase or decrease between two values. Free online percentage change calculator for finance and growth.
Процент Change is a free online математика tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.
Математические и статистические инструменты используют стандартную библиотеку Math JavaScript с контролем точности плавающей запятой. Охватывают повседневные вычисления, финансовую математику и статистические сценарии.
We noticed many online calculators track inputs or require accounts. We built this tool to run entirely in your browser — no tracking, no uploads, just instant results.
Да, полностью бесплатный и без регистрации.
Да, работает в мобильных браузерах с поддержкой касания.
Математика
Все вычисления используют стандартную библиотеку Math JavaScript с контролем точности плавающей запятой. Результаты надёжны.
ToolPure provides calculators for percentages, compound interest, statistics (mean, median, standard deviation), unit conversions, and number base conversions (binary, octal, decimal, hexadecimal).
Calculations use JavaScript Number type with up to 15-17 significant digits. For high-precision requirements, the tools support BigNumber.js for arbitrary precision arithmetic up to 100 decimal places.
Yes, calculation results can be copied to clipboard, downloaded as JSON or CSV files, or shared via URL parameters that encode the input values and results.
Yes. Процент Change is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.