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. Use this basic calculator online for math with addition, subtraction, division and multiplication. The calculator includes functions for square root, percentage, pi, exponents, powers and rounding. Standard Calculator Use this standard tape calculator for everyday arithmetic with a running calculation tape. A beautiful, free online scientific calculator with advanced features for evaluating percentages, fractions, exponential functions, logarithms, trigonometry, statistics, and more. This free percentage calculator computes a number of values involving percentages, including the percentage difference between two given values. SolveCalc is a free calc solver and scientific calculator for students and teachers. Solve algebra, trigonometry, fractions, percentages and logarithms instantly with no download needed. Multiple calculator themes and math tools included. Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with in-depth information. Basic Online Calculator with 10-digit keypad and 4 functions to add, subtract, multiply and divide numbers. Includes basic handheld calculator functions for square, square root, percent, sign change, Pi and memory. Our Full Screen Online Calculator is an essential tool for anyone who needs to perform mathematical calculations quickly and easily. With a user-friendly interface and a range of functions, our calculator can handle all types of calculations, from basic arithmetic to complex mathematical equations. Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.