FREE ONLINE TOOLS
🧮 Free Math Tools
Browse 22 free math tools on FastTool. All tools run in your browser with no signup required.
About Our Math Tools
From simple percentages to complex scientific calculations, FastTool's free math tools handle the numbers so you can focus on understanding the results. These browser-based calculators cover unit conversion, random number generation, statistics, trigonometry, and more. Students can check homework answers, teachers can demonstrate formulas in class, and professionals can verify calculations on the go. Every tool is designed for speed and clarity with clean interfaces that show you exactly what was computed and how. No software downloads, no sign-up, and no ads interrupting your calculations.
All Math Tools (22)
Unit Converter
Convert length, weight, temperature, speed, and data units instantly.
Percentage Calculator
Calculate percentages: Y% of X, increase/decrease rate, and difference.
Scientific Calculator
Full scientific calculator with trig, logarithm, and factorial functions.
Random Number Generator
Generate random numbers within any range with optional no-duplicate mode.
Speed Distance Time Calculator
Calculate speed, distance, or time from any two values.
Binary Calculator
Perform binary arithmetic: add, subtract, multiply, divide.
Matrix Calculator
Matrix operations: add, multiply, transpose, determinant.
Statistics Calculator
Calculate mean, median, mode, standard deviation, and variance.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers instantly — supports values 1 to 3,999.
Number to Words
Convert any number up to 999 trillion into English words — perfect for checks, invoices, and legal documents.
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0) with step-by-step solution — find roots, discriminant, and vertex.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine instantly — with conversion formulas shown.
Prime Number Checker
Check if a number is prime, find all primes in a range, and get prime factorization — useful for math and education.
Fibonacci Sequence Generator
Generate Fibonacci sequence numbers up to any count — see the golden ratio, sum, and sequence properties instantly.
Number Formatter
Format numbers with thousands separators, currency symbols, decimal places, and scientific notation — instant conversion for any locale.
Fraction Calculator
Add, subtract, multiply, and divide fractions — plus simplify, convert to decimals, and find mixed numbers. Step-by-step results.
LCM & GCD Calculator
Calculate the Least Common Multiple (LCM) and Greatest Common Divisor (GCD) of two or more numbers — with step-by-step prime factorization.
Number Sequence Finder
Detect patterns in number sequences and predict the next terms — identifies arithmetic, geometric, Fibonacci, quadratic, perfect squares, and cubic sequences.
Percentage Change Calculator
Calculate percentage increase or decrease between two values — enter an original and new value to get the percentage change, absolute difference, and direction instantly.
Scientific Notation Converter
Convert numbers to and from scientific notation instantly — enter a standard number or scientific notation and get the converted result with step-by-step explanation.
Proportion Calculator
Solve proportions and ratios instantly — enter three values in a/b = c/d format and find the missing fourth value, with cross-multiplication steps shown.
Equation Solver
Solve linear, quadratic, and system of two linear equations step-by-step. Enter your equation and get the solution with full working shown.