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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. 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.

  3. 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, …

  4. The Calculator Site - Free Online Calculators

    Popular calculators for finance, construction, health, cooking, education and more. Over 8 million calculations performed monthly. All free to use.

  5. Scientific Calculator - Desmos

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

  6. 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 …

  7. Basic Calculator - Online Calculator

    Learn how to use your basic calculator with easy-to-follow instructions. Discover how to input numbers and symbols, perform simple math, and calculate percentages.

  8. Basic Calculator - Free Online Math Calculator | MyOnlineCalc

    MyOnlineCalc is a comprehensive free online calculator offering both basic arithmetic and advanced scientific mathematical functions. Perfect for students, professionals, engineers, and …

  9. Calculator - English

    Your all-in-one online calculator for quick and precise basic to scientific calculations. Easily perform addition, subtraction, multiplication, division, trigonometry, logarithms, and more with …

  10. calculator.com®

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