Advanced Decimal Calculator - High Precision Online Tool

Advanced Decimal Calculator

High Precision Online Tool | Scientific, Financial & Engineering Calculations

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Calculation History

Save & Export Results

About the Advanced Decimal Calculator

Welcome to the ultimate Advanced Decimal Calculator, a free online tool designed for high-precision mathematical computations. Unlike standard calculators that round off numbers prematurely, our tool utilizes advanced algorithms to provide 100% accurate results, making it ideal for scientific, engineering, and financial purposes.

Key Features

  • High Precision Math: Eliminate floating-point errors. Calculate up to 64 decimal places with exact accuracy.
  • Scientific Functions: Includes Trigonometry (Sin, Cos, Tan), Logarithms, Square Roots, and Exponents.
  • Data Export: Easily download your calculation history in CSV (Excel) or PDF formats for documentation.
  • Memory Functions: Standard M+, M-, MR, and MC buttons for complex multi-step calculations.
  • Smart History: Automatically saves your session so you never lose your data, even if you refresh the page.

Who is this tool for?

This online calculator is perfect for students, researchers, engineers, and financial analysts who require exact decimal precision. Whether you are solving complex algebra, converting units, or managing accounting figures, this tool ensures reliability and speed.

Advanced Decimal Calculator v3.1 • Free Online Math Tool

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`); w.document.close(); }function saveSession() { saveToLocalStorage(); showToast('Session Saved'); } function saveToLocalStorage() { localStorage.setItem('calcSession', JSON.stringify({ history, memory: memory.toString(), precision, angleUnit, theme: themeSelect.value })); } function loadFromLocalStorage() { try { const data = JSON.parse(localStorage.getItem('calcSession')); if (data) { history = data.history || []; memory = data.memory || 0; precision = data.precision || 12; angleUnit = data.angleUnit || 'deg'; if (data.theme) { themeSelect.value = data.theme; changeTheme(data.theme); } precisionInput.value = precision; angleUnitSelect.value = angleUnit; updateHistoryDisplay(); } } catch (e) {} }function changeTheme(theme) { document.body.className = theme !== 'dark' ? `theme-${theme}` : ''; } function showToast(msg, isError = false) { toast.textContent = msg; toast.className = `toast ${isError ? 'error' : ''} show`; setTimeout(() => toast.classList.remove('show'), 3000); } function handleKeyboardInput(e) { if (e.key >= '0' && e.key <= '9') appendNumber(e.key); else if (e.key === '.') appendDecimal(); else if (['+', '-', '*', '/'].includes(e.key)) setOperation(e.key); else if (e.key === 'Enter' || e.key === '=') evaluate(); else if (e.key === 'Backspace') handleAction('backspace'); else if (e.key === 'Escape') handleAction('clear'); }