Free Math Tools Online
33 free tools — no signup required
Calculators and solvers for everyday math, statistics, and geometry. From basic percentages and averages to standard deviation, matrix operations, and quadratic equations. Also includes practical calculators for BMI, tips, discounts, GPA, and loan payments.
Percentage Calculator
Calculate percentages, percentage change, and percentage differences.
Scientific Calculator
A full-featured scientific calculator with advanced math functions.
BMI Calculator
Calculate your Body Mass Index and see your health category.
Age Calculator
Calculate exact age in years, months, and days from a birthdate.
Loan Calculator
Calculate monthly payments, total interest, and amortization schedules.
Compound Interest Calculator
Calculate compound interest with customizable rates and periods.
Tip Calculator
Calculate tips and split bills between multiple people.
Discount Calculator
Calculate sale prices, discount amounts, and savings.
Average Calculator
Calculate mean, median, mode, and range of a set of numbers.
Roman Numeral Converter
Convert between Roman numerals and decimal numbers.
Random Number Generator
Generate random numbers within a custom range.
GPA Calculator
Calculate your Grade Point Average from your course grades.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions.
Standard Deviation Calculator
Calculate standard deviation, variance, and other statistical measures.
Matrix Calculator
Perform matrix operations: addition, multiplication, determinant, inverse, and transpose.
Quadratic Equation Solver
Solve quadratic equations and show the discriminant, roots, and vertex.
Prime Number Checker
Check if a number is prime and find prime factors.
GCD & LCM Calculator
Calculate the Greatest Common Divisor and Least Common Multiple of numbers.
Number to Words
Convert numbers to their written word form in English.
Ratio Calculator
Solve ratio and proportion problems with missing values.
Area Calculator
Calculate the area of common 2D shapes including rectangles, circles, triangles, and more.
Volume Calculator
Calculate the volume of common 3D shapes including cubes, spheres, and cylinders.
Pythagorean Theorem Calculator
Solve for any side of a right triangle using the Pythagorean theorem.
Permutation Calculator
Calculate the number of permutations P(n,r) for ordered arrangements.
Combination Calculator
Calculate the number of combinations C(n,r) for unordered selections.
Logarithm Calculator
Calculate logarithms with any base including natural log and log base 10.
Exponent Calculator
Calculate powers and exponents including fractional and negative exponents.
Fibonacci Sequence Generator
Generate Fibonacci sequences and find specific Fibonacci numbers.
Triangle Calculator
Solve any triangle given sides and angles using the law of sines and cosines.
Circle Calculator
Calculate circumference, area, diameter, and radius of a circle.
Probability Calculator
Calculate basic, compound, and conditional probability for events.
Modular Arithmetic Calculator
Perform modulo operations and explore modular arithmetic concepts.
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0) and find roots.