Solve common math problems, formulas, patterns, and classroom-style calculation tasks.
20 free calculators · No sign-up required
Calculate what percentage one number is of another or find any percent of a value.
Evaluate scientific expressions using trigonometry, logarithms, and exponents.
Add, subtract, multiply, or divide any two fractions.
Calculate what percentage one number is of another or find any percent of a value.
Evaluate scientific expressions using trigonometry, logarithms, and exponents.
Add, subtract, multiply, or divide any two fractions.
Simplify any ratio to its lowest terms using the greatest common factor.
Solve for the missing value in any proportion using cross-multiplication.
Calculate any base raised to any exponent instantly.
Calculate the logarithm of any value at any base.
Calculate the square root of any positive number.
Calculate triangle area, perimeter, and hypotenuse from base and height.
Calculate circle area and circumference from radius or diameter.
Calculate volume and surface area for rectangular prisms, cylinders, and spheres.
Calculate standard deviation, variance, and mean for any data set.
Calculate mean, median, and mode for any set of numbers.
Calculate nPr — the number of ordered arrangements of r items from n total.
Calculate nCr — the number of ways to choose r items from n without regard to order.
Generate a random number within any range with any decimal precision.
Round any number to any number of decimal places using standard, floor, or ceiling rounding.
Find the greatest common factor of any two integers using the Euclidean algorithm.
Calculate the least common multiple of any two integers.
Solve any quadratic equation ax² + bx + c = 0 instantly.
Browse all tools on the CalcAdvisor homepage.