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  1. Online Calculator

    The original calculator was invented in the 17th century by a Frenchman called Blaise Pascal! He was just 18 years old, and wanted to help his father do his tax calculations.

  2. Scientific Calculator - Desmos

    A beautiful, free online scientific calculator with advanced features for evaluating percentages, fractions, exponential functions, logarithms, trigonometry, statistics, and more.

  3. Calculator.net: Free Online Calculators - Math, Fitness, Finance, …

    Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with in-depth information.

  4. The Best Free Online Calculator

    Use the best online calculator for any math calculations on PC and smartphones. The free calculator allows you to quickly and accurately perform arithmetic, calculate percentages, raise …

  5. Calculator

    Oct 29, 2025 · Use this basic calculator online for math with addition, subtraction, division and multiplication. The calculator includes functions for square root, percentage, pi, exponents, …

  6. Math Calculator

    The Math Calculator will evaluate your problem down to a final solution. You can also add, subtraction, multiply, and divide and complete any arithmetic you need.

  7. Web 2.0 scientific calculator

    Free Online Scientific Notation Calculator. Solve advanced problems in Physics, Mathematics and Engineering. Math Expression Renderer, Plots, Unit Converter, Equation Solver, Complex …

  8. The Calculator Site - Free Online Calculators

    An extensive collection of free, highly-rated online calculators and converters covering finance, construction, education, health, cooking and math for everyday use. Trusted by millions - over …

  9. calculator.com®

    Free online calculators for everything. Some solve problems, some satisfy curiosity and some simply for fun.

  10. Calculator Online - 247 Calculator

    Jan 17, 2025 · Use our free calculator online for quick and accurate math calculations on the go. Compatible with all devices, it supports addition, subtraction, multiplication, division, and more …