Math Calculators

Calculate percentages, percentage changes, increases, decreases and reverse percentages.

Adds, subtracts, multiplies or divides fractions and reduces the answer to a simpler form.

Finds the mean together with supporting totals and counts.

Calculate percentage increases or decreases from an original value.

Simplify and compare ratios between two or more quantities.

Calculate area for common two-dimensional shapes in multiple units.

Calculate volume for common three-dimensional shapes and convert units.

Calculate sample or population standard deviation and variance.

Find mean, median and mode for a set of values.

Exponents are a compact way to represent repeated multiplication.

A square root asks which number, when multiplied by itself, produces the original value.

Slope describes how much a line rises or falls for each unit of horizontal change.

A triangle can be solved from different combinations of sides, angles, base and height.

Solves for whichever side is missing.

Is useful when a drawing or real object gives you only one dimension.

Surface area measures the total outside area of a three-dimensional solid.

Scientific notation writes very large or very small numbers as a coefficient multiplied by a power of ten.

Handles common single-event, combined-event and complementary probability relationships.

A z-score shows how far an observation lies from a mean in units of standard deviation.

Variance measures how widely values spread around their mean by averaging squared deviations.

Calculate confidence interval with clear mathematical inputs.

Solves equations in the standard form ax² + bx + c = 0 and exposes the discriminant behind the result.

Percentage error compares an observed or experimental value with an accepted reference value.

Permutations and combinations both count ways of choosing items, but they answer different questions.

Calculate lcm with clear mathematical inputs.

The greatest common factor is the largest positive integer that divides every number in a set without remainder.

Prime factorization breaks a whole number into prime numbers whose product recreates the original value.

Factors are whole numbers that divide another integer without leaving a remainder.

Handles common, natural and other supported logarithm bases.

Rounding replaces a number with a nearby value at a chosen precision.

The midpoint of two points lies exactly halfway between them in coordinate space.

The distance between two coordinates is the straight-line length joining them.

Isolates that unknown while preserving the balancing logic used in algebra.

Solves supported linear systems and helps distinguish unique, inconsistent and dependent cases.

A factorial multiplies a positive integer by every smaller positive integer down to 1.

An arithmetic sequence changes by the same fixed amount from one term to the next.

A geometric sequence changes by multiplying each term by the same common ratio.

A percentile describes the position of a value within an ordered data set.

The interquartile range measures the spread of the middle 50% of a data set.

Calculate cone with clear mathematical inputs.

A cylinder has a constant circular cross-section along its height.

A pyramid tapers from a polygonal base to a single apex.

Density describes how much mass is packed into a given volume.

Force describes a push or pull that can change an object’s motion.

Acceleration measures how quickly velocity changes with time.

Momentum combines mass and velocity into one quantity that describes motion.

Evaluates the determinant of a square matrix.

Finds the inverse of a square matrix when one exists.

Converts a terminating or repeating decimal into an equivalent fraction and reduces it to lowest terms.

Divides a numerator by a denominator to express the fraction in decimal form.

Calculate mixed number with clear mathematical inputs.

Solves relationships where two ratios are equal.

Expresses a straight line as y = mx + b, where m is slope and b is the y-intercept.

Estimates how much a sample statistic, most commonly the sample mean, would vary across repeated samples.

Estimates the plus-or-minus distance around a sample estimate for a chosen confidence level.

Measures the strength and direction of a linear relationship between two numerical variables.

Fits a straight line that predicts one variable from another by minimizing squared residuals.

Calculate binomial probability with clear mathematical inputs.

Converts values to z-scores or finds probabilities under a bell-shaped normal model.

Finds the probability-weighted average outcome of a random process.

Calculate geometric mean with clear mathematical inputs.

Calculate harmonic mean with clear mathematical inputs.

Coefficient of variation expresses standard deviation relative to the mean.

Calculate sample size with clear mathematical inputs.

A cube root asks which number multiplied by itself three times gives the original value.

Generalizes square and cube roots by allowing any positive integer root degree.

A circle sector is the wedge-shaped region bounded by two radii and the arc between them.

Arc length measures the distance along part of a circle’s circumference.

Handles common arithmetic and representation tasks while keeping real and imaginary parts separate.

Combine vectors, scale them and derive quantities such as magnitude.

The dot product combines two vectors into a single scalar.

The cross product of two three-dimensional vectors produces a third vector perpendicular to both.

Polynomial calculations involve expressions built from coefficients and non-negative integer powers of a variable.

Covariance measures whether two variables tend to move together.

Calculate mean absolute deviation with clear mathematical inputs.

Calculate root mean square with clear mathematical inputs.

Calculate poisson probability with clear mathematical inputs.

Chi-square calculations compare observed counts with expected counts.

Changes the representation of an integer between numeral systems such as binary, octal, decimal and hexadecimal.

Convert roman numeral between common units quickly and consistently.

Significant figures describe the digits in a measured or reported number that convey its precision.

Odds and probability express the same uncertainty in different forms.

Calculate percentage difference with clear mathematical inputs.

Works with the geometry of a perfectly round three-dimensional object.

Finds area and related measurements for a quadrilateral with one pair of parallel sides under the usual definition.

Finds area, perimeter and related dimensions for a quadrilateral whose opposite sides are parallel.

Works with the geometry of an oval defined by two semi-axes.

Finds volume, surface area and related dimensions for a box-shaped solid with rectangular faces.

Works with shapes whose sides and interior angles are all equal.

Calculate circle chord with clear mathematical inputs.