Fast Math, Percentage & Geometry Calculators
Solve percentages, proportions, circle geometry, statistics, and algebraic formulas with instant formulas and step-by-step clarity.
Percentage Calculator
Find X percent of any number.
Percentage Change Calculator
Increase or decrease between two values.
Average Calculator
Mean, median, and sum of a list of numbers.
Pythagorean Theorem Calculator
Hypotenuse and area of a right triangle.
Circle Calculator
Area, circumference, and diameter from the radius.
Rectangle Calculator
Area, perimeter, and diagonal of a rectangle.
Quadratic Equation Solver
Real roots of ax² + bx + c = 0.
GCD and LCM Calculator
Greatest common divisor and least common multiple.
Standard Deviation Calculator
Mean, variance, and standard deviation of a data set.
Ratio and Proportion Calculator
Solve a : b = c : x.
Triangle Area Calculator
Area and perimeter from three side lengths.
Combinations and Permutations Calculator
Count ways to choose or arrange items.
Median, Mode and Range Calculator
Median, mode, range, and sum of a list of numbers.
Sphere Calculator
Volume and surface area from the radius.
Percentage Difference Calculator
Percent difference between two values, regardless of order.
Prime Number Checker
Check if a number is prime and find the next prime.
Arithmetic Sequence Calculator
Nth term and sum of an arithmetic sequence.
Factorial Calculator
Calculate n! with digit count and trailing zeros.
Permutations and Combinations Calculator
Count arrangements and selections of r items from n.
Slope and Distance Calculator
Distance, slope, midpoint, and line equation from two points.
Ratio Simplifier
Reduce a ratio of two whole numbers to its simplest form.
Logarithm Calculator
Log of any number in any base, plus ln, log10, and log2.
Fraction Calculator
Add, subtract, multiply, or divide two fractions.
Z-Score Calculator
Find how many standard deviations a value is from the mean.
Nth Root Calculator
Find square roots, cube roots, and any other root.
Cylinder & Cone Calculator
Volume and surface area for a cylinder and a cone of the same size.