General-Purpose Calculators
General-purpose calculators cover everyday sums. Use a basic calculator with brackets, percent and powers when you need more than four functions, or a simple calculator with big keys when you want fast, clear entry on a phone. Both run in your browser, are free and need no sign-up.
Last updated October 20, 2026
All General-Purpose tools
Math & Statistics · General-Purpose
Basic CalculatorAdd, subtract, multiply and divide, with brackets, percent and powers
Math & Statistics · General-Purpose
Simple CalculatorBig keys for adding, subtracting, multiplying and dividing
Math & Statistics · General-Purpose
Scientific CalculatorTrig, logs, roots, powers and factorials with a DEG/RAD switch
Math & Statistics · General-Purpose
Math CalculatorType a whole math problem and see the order of operations
Math & Statistics · General-Purpose
Graphing CalculatorPlot up to six functions of x, zoom and pan, and find the y-intercept, vertex and roots of simple polynomials
Related tools
Math & Statistics · Arithmetic & Percentages
Percentage CalculatorPercent of a number, percent change and percent increase or decrease
Math & Statistics · Arithmetic & Percentages
Ratio CalculatorSimplify a ratio or solve a proportion for the missing number
Math & Statistics · Geometry
Slope CalculatorSlope, line equation, angle and distance from two points
Math & Statistics · Geometry
Volume CalculatorVolume of a cube, box, cylinder, cone, sphere or pyramid
Math & Statistics · Arithmetic & Percentages
LCM CalculatorLeast common multiple of 2 to 10 numbers, with prime factors