Our free math calculators cover everything from basic arithmetic to advanced algebra — designed for students, teachers, and professionals who need fast, reliable answers with clear explanations. Every calculator shows the formula used and, where relevant, a step-by-step solution so you understand the process, not just the result.
Basic Math & Number Calculators
- Percentage Calculator — Find what percent one number is of another, calculate percentage increase or decrease, and more.
- Square Root Calculator — Calculate the square root or nth root of any number instantly.
- Fraction Calculator — Add, subtract, multiply, and divide fractions with full step-by-step solutions and simplified results.
- Average Calculator — Calculate the mean, median, mode, and range for any set of numbers.
- Random Number Generator — Generate one or more random numbers within any range you specify.
- Rounding Calculator — Round any number to a specified number of decimal places or significant figures.
- Significant Figures Calculator — Round to sig figs and understand the rules of significant figures.
Algebra & Advanced Calculators
- Quadratic Formula Calculator — Solve any quadratic equation step by step using the quadratic formula.
- Exponent Calculator — Calculate any base raised to any power, including negative and fractional exponents.
- Logarithm Calculator — Compute log base 10, natural log (ln), or log with any custom base.
- GCD and LCM Calculator — Find the greatest common divisor and least common multiple of two or more numbers.
- Combination and Permutation Calculator — Calculate nCr and nPr for probability and statistics problems.
- Prime Number Calculator — Check if a number is prime and find the prime factorization of any integer.
- Scientific Calculator — A full-featured scientific calculator with trigonometric, logarithmic, and algebraic functions.
Academic Calculators
- GPA Calculator — Calculate your semester GPA or cumulative GPA by entering grades and credit hours.
- Grade Calculator — Find out what grade you need on your final exam to achieve your target course grade.
Business Math Calculators
- Discount Calculator — Find the sale price after any percentage discount.
- Ratio Calculator — Simplify ratios, find equivalent ratios, and solve proportion problems.
Whether you’re helping your child with homework, preparing for a standardized test, or solving a real-world problem, these free math calculators are designed to be fast, accurate, and educational.