Free Calculator Online | Scientific Calculator | Basic Math Tool

Our free online Calculator at Free Calculator provides instant solutions for basic arithmetic, scientific calculations, financial math, and everyday computations. Whether you’re a student, professional, or just need quick math answers, this versatile tool handles everything from simple additions to complex equations with perfect accuracy.

Key Features

✔ Basic Operations (+, -, ×, ÷)
✔ Scientific Functions (sin, cos, log, exponents)
✔ Financial Calculations (interest, percentages)
✔ Unit Conversions (length, weight, temperature)
✔ Mobile-Friendly & 100% Free

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How to Use the Calculator

1. Basic Calculations

• Click buttons or type directly to perform:
  • Addition (5 + 3 = 8)
  • Subtraction (10 - 4 = 6)
  • Multiplication (7 × 3 = 21)
  • Division (20 ÷ 5 = 4)

2. Advanced Functions

• Use the scientific panel for:
  • Powers (5² = 25)
  • Square roots (√9 = 3)
  • Trigonometry (sin(30°) = 0.5)
  • Logarithms (log(100) = 2)

3. Financial & Conversion Tools

• Calculate:
  • Percentages (15% of 200 = 30)
  • Interest (Loan/Investment growth)
  • Unit Changes (Miles to Kilometers, °F to °C)

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Why Use Our Calculator?

✅ No Installation Needed – Runs in any web browser
✅ Multiple Calculation Modes – Basic/Scientific/Financial
✅ Error-Free Results – Precise algorithms
✅ Memory Functions – Store/recall values (M+, M-, MR)
✅ Dark/Light Mode – Eye-friendly display options

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Practical Applications of Scientific Calculator

User	Use Case
Students	Homework, algebra, geometry
Engineers	Scientific/technical computations
Accountants	Tax, profit/loss calculations
Shoppers	Discounts & sale prices
Travelers	Currency/unit conversions

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