Math & Number Tools
26 free browser-based tools for math workflows
Free Math and Number Tools Online
Math and number tools are useful for quick calculations, classroom checks, spreadsheet preparation, engineering notes, and everyday numeric comparisons. They keep common formulas visible and make the result easy to copy.
Built for quick calculations where a focused page is faster than a spreadsheet.
Category scope
26
tools indexed in this hub
Recommended starting points
These pages match the highest-intent tasks in this category and link onward to nearby tools and guides.
Percentage Calculator
Calculate percentages, increases, and decreases
Average & Mean Calculator
Calculate mean, median, mode, and range
Standard Deviation Calculator
Calculate standard deviation and variance
Ratio & Proportion Calculator
Solve ratios and proportions with missing values
Number Base Converter
Convert between binary, octal, decimal, and hex
Fraction Calculator
Add, subtract, multiply, and divide fractions
Common tasks
Start from the job you need to finish, then open the closest utility.
All math & number tools
Percentage Calculator
Calculate percentages, increases, and decreases
Average & Mean Calculator
Calculate mean, median, mode, and range
Standard Deviation Calculator
Calculate standard deviation and variance
Ratio & Proportion Calculator
Solve ratios and proportions with missing values
Number Base Converter
Convert between binary, octal, decimal, and hex
Fraction Calculator
Add, subtract, multiply, and divide fractions
Unit Converter
Convert between common units of measurement
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and more
Aspect Ratio Calculator
Calculate and maintain aspect ratios
Bytes Converter
Convert between bytes, KB, MB, GB, and TB
Scientific Notation
Convert between standard and scientific notation
Random Number Generator
Generate random numbers within a range
Factorial Calculator
Calculate factorials and permutations
GCD/LCM Calculator
Calculate greatest common divisor and least common multiple
Roman Numeral Converter
Convert between Roman numerals and decimal numbers
Statistics Calculator
Calculate mean, median, mode, and standard deviation
Hex/Decimal Converter
Convert between hexadecimal and decimal numbers
Prime Number Checker
Check if a number is prime and find nearby primes
Fibonacci Sequence Generator
Generate Fibonacci numbers up to any position
Quadratic Equation Solver
Solve quadratic equations step by step
Matrix Calculator
Perform matrix operations: add, multiply, transpose, determinant
Probability Calculator
Calculate probabilities for common scenarios
Exponent Calculator
Calculate powers, roots, and exponential expressions
Logarithm Calculator
Calculate logarithms with any base
Binary Arithmetic Calculator
Perform arithmetic operations on binary numbers
Area Calculator
Calculate area of common geometric shapes
Related guides
Guide
How to use Percentage Calculator
Calculate percentages, increases, and decreases
Guide
How to use Number Base Converter
Convert between binary, octal, decimal, and hex
Guide
How to use Unit Converter
Convert between common units of measurement
Guide
How to use Aspect Ratio Calculator
Calculate and maintain aspect ratios
Guide
How to use Bytes Converter
Convert between bytes, KB, MB, GB, and TB
Guide
How to use Scientific Notation
Convert between standard and scientific notation
Guide
How to use Random Number Generator
Generate random numbers within a range
Guide
How to use Factorial Calculator
Calculate factorials and permutations
FAQ
Are these calculators intended for advanced math?
They are focused on common math, number conversion, and statistics tasks rather than symbolic algebra or proof work.
Can I use them on mobile?
Yes. The calculator pages are responsive and work for quick checks on phones, tablets, and desktop browsers.