Basic Calculator
Use basic calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenMath & number tools
Math and number tools
Solve everyday arithmetic, percentages, equations, statistics, matrices and number conversions.
20 focused tools
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Scientific Calculator
Use scientific calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenPercentage Calculator
Calculate percentages, percentage increase or decrease and reverse percentages from the original and final values.
Math & number toolsOpenRatio and Proportion Calculator
Use ratio and proportion calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenFraction Calculator
Use fraction calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenAverage and Statistics Calculator
Calculate mean, median, mode and range from a list of numbers with a clear statistical summary.
Math & number toolsOpenStandard Deviation and Variance Calculator
Use standard deviation and variance calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenRounding and Significant Figures Calculator
Use rounding and significant figures calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenPrime Number and Factorisation Checker
Use prime number and factorisation checker directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenGCD and LCM Calculator
Use gcd and lcm calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenNumber Sequence Analyser
Use number sequence analyser directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenEquation Solver
Use equation solver directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenQuadratic Equation Calculator
Use quadratic equation calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenSimultaneous Equation Solver
Use simultaneous equation solver directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenMatrix Calculator
Use matrix calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenProbability Calculator
Use probability calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenPermutation and Combination Calculator
Use permutation and combination calculator directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenNumber Base Converter
Convert values between binary, decimal, octal and hexadecimal number systems with instant validation.
Math & number toolsOpenRoman Numeral Converter
Use roman numeral converter directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenNumber to Words Converter
Use number to words converter directly in your browser with clear inputs and an exportable result.
Math & number toolsOpenWhat this category covers
Math and number tools cover arithmetic, percentages, sequences and numeric formatting. They provide quick working for learning, checking and everyday calculations without hiding the requested operation.
Recommended starting tools
- Basic Calculator — Perform everyday arithmetic with a clear expression history and reusable results.
- Percentage Calculator — Calculate percentages, percentage increase or decrease and reverse percentages from the original and final values.
- Number to Words Converter — Convert number to words between the supported values, units or formats and copy or download the result.
How to choose
Use a dedicated percentage or conversion tool when units or interpretation matter; use the basic calculator for direct arithmetic.
Frequently asked questions
Does the calculator show operation precedence?
The basic calculator evaluates supported expressions according to its documented operator rules.
Should rounded values be reused?
Keep unrounded source values for later calculations when accuracy matters.