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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.

Math Tools

Percentage Calculator

Calculate percentages, percentage change, and percentage differences.

🧮Math Tools

Scientific Calculator

A full-featured scientific calculator with advanced math functions.

⚖️Math Tools

BMI Calculator

Calculate your Body Mass Index and see your health category.

🎂Math Tools

Age Calculator

Calculate exact age in years, months, and days from a birthdate.

🏦Math Tools

Loan Calculator

Calculate monthly payments, total interest, and amortization schedules.

📈Math Tools

Compound Interest Calculator

Calculate compound interest with customizable rates and periods.

💰Math Tools

Tip Calculator

Calculate tips and split bills between multiple people.

🏷️Math Tools

Discount Calculator

Calculate sale prices, discount amounts, and savings.

📊Math Tools

Average Calculator

Calculate mean, median, mode, and range of a set of numbers.

🏛️Math Tools

Roman Numeral Converter

Convert between Roman numerals and decimal numbers.

🎲Math Tools

Random Number Generator

Generate random numbers within a custom range.

🎓Math Tools

GPA Calculator

Calculate your Grade Point Average from your course grades.

🔢Math Tools

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step solutions.

📊Math Tools

Standard Deviation Calculator

Calculate standard deviation, variance, and other statistical measures.

🔢Math Tools

Matrix Calculator

Perform matrix operations: addition, multiplication, determinant, inverse, and transpose.

📐Math Tools

Quadratic Equation Solver

Solve quadratic equations and show the discriminant, roots, and vertex.

🔍Math Tools

Prime Number Checker

Check if a number is prime and find prime factors.

🔗Math Tools

GCD & LCM Calculator

Calculate the Greatest Common Divisor and Least Common Multiple of numbers.

🔤Math Tools

Number to Words

Convert numbers to their written word form in English.

⚖️Math Tools

Ratio Calculator

Solve ratio and proportion problems with missing values.

📐Math Tools

Area Calculator

Calculate the area of common 2D shapes including rectangles, circles, triangles, and more.

📦Math Tools

Volume Calculator

Calculate the volume of common 3D shapes including cubes, spheres, and cylinders.

📐Math Tools

Pythagorean Theorem Calculator

Solve for any side of a right triangle using the Pythagorean theorem.

🔢Math Tools

Permutation Calculator

Calculate the number of permutations P(n,r) for ordered arrangements.

🎲Math Tools

Combination Calculator

Calculate the number of combinations C(n,r) for unordered selections.

📉Math Tools

Logarithm Calculator

Calculate logarithms with any base including natural log and log base 10.

⬆️Math Tools

Exponent Calculator

Calculate powers and exponents including fractional and negative exponents.

🐚Math Tools

Fibonacci Sequence Generator

Generate Fibonacci sequences and find specific Fibonacci numbers.

📐Math Tools

Triangle Calculator

Solve any triangle given sides and angles using the law of sines and cosines.

Math Tools

Circle Calculator

Calculate circumference, area, diameter, and radius of a circle.

🎲Math Tools

Probability Calculator

Calculate basic, compound, and conditional probability for events.

🔄Math Tools

Modular Arithmetic Calculator

Perform modulo operations and explore modular arithmetic concepts.

📐Math Tools

Quadratic Equation Solver

Solve quadratic equations (ax² + bx + c = 0) and find roots.