Everyday calculations
Work out percentages and percentage change, convert between units of length, weight, temperature, area, volume and speed, or solve quadratic equations.
Free Online Math Tools
Solve everyday calculations, convert units and number bases, and explore statistics without reaching for a spreadsheet. Every calculator runs locally in your browser.
Percentage Calculator
Calculate percentages, percentage change, and solve various percentage problems.
Statistics Calculator
Mean, median, mode, variance, standard deviation and quartiles from a data set.
Quadratic Equation Solver
Solve quadratic equations ax² + bx + c = 0 with real and complex roots calculation.
Prime Number Checker
Test primality, factorise a number and find the nearest primes around it.
Unit Converter
Convert between different units of length, weight, temperature, area, volume and speed.
Number Base Converter
Convert large integers between binary, octal, decimal and hexadecimal.
Scientific Notation Converter
Convert numbers to and from scientific and engineering notation.
Numbers and statistics
Summarise a data set with mean, median, mode, variance and standard deviation, test whether a number is prime, or convert between number bases and scientific notation.
Related toolboxes
Need to inspect textual data? Try the text tools, or browse networking, developer and electronics utilities.