Free online calculator with 51+ tools: scientific calculator, percentage calculator, BMI calculator, currency converter, unit converter, loan EMI, GPA calculator and more. No download, no signup required. Standard Calculator Use this standard tape calculator for everyday arithmetic with a running calculation tape. 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. This free percentage calculator computes a number of values involving percentages, including the percentage difference between two given values. 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. 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. 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. A beautiful, free online scientific calculator with advanced features for evaluating percentages, fractions, exponential functions, logarithms, trigonometry, statistics, and more. Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with in-depth information. Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.