Math & Science

Calculate percentages three ways: what is X% of Y, X is what % of Y, and percentage change from X to Y.

Add, subtract, multiply, and divide fractions. Results shown as fraction, mixed number, and decimal.

Calculate mean, variance, and standard deviation (population and sample) from a data set.

Calculate probability from favorable and total outcomes. Find combined probability for independent or mutually exclusive events.

Calculate all sides, angles, area, and perimeter of a triangle from any 3 known values.

Calculate area and perimeter for rectangles, circles, triangles, trapezoids, and ellipses.

Calculate volume and surface area for cubes, boxes, cylinders, spheres, and cones.

Solve for speed, distance, or time from any two known values.

Generate random numbers in a range with options for quantity, duplicates, and sorting.

Solve quadratic equations ax²+bx+c=0. Find roots, discriminant, and vertex.

Calculate slope, y-intercept, line equation, distance, and midpoint from two points.

Calculate radius, diameter, circumference, and area from any one circle measurement.

Calculate cylinder volume in cubic feet, gallons, and liters, plus surface area.

Calculate sphere volume, surface area, diameter, and circumference from radius.

Calculate any base raised to any power including negative and fractional exponents.

Calculate logarithms in any base including natural (ln), common (log10), and binary (log2).

Calculate permutations P(n,r) and combinations C(n,r) with factorial breakdown.

Calculate determinant, inverse, transpose, and multiplication for 2×2 matrices.

Find greatest common divisor and least common multiple with prime factorization.

Convert between standard form and scientific notation. Also shows engineering notation.

Convert between Arabic numbers (1-3999) and Roman numerals bidirectionally.

Convert numbers between decimal, binary, octal, and hexadecimal.

Calculate z-score, percentile, and probability from a value, mean, and standard deviation.

Calculate confidence interval bounds and margin of error at 90%, 95%, or 99% confidence.

Calculate required sample size for surveys from population, confidence level, and margin of error.

Calculate chi-square statistic and p-value from a 2×2 contingency table.

Calculate Pearson correlation coefficient (r) and r² from two data sets.

Calculate molarity from moles and volume. Also solve for moles or volume.

Calculate molecular weight from chemical formula. Parses element symbols and subscripts.

Calculate remaining amount after radioactive or chemical decay over time.

Solve for voltage, current, or resistance from any two values. Also shows power (watts).

Perform one-way ANOVA analysis of variance with F-statistic and p-value.

Calculate density, mass, or volume from the other two values.

Calculate the distance between two points in 2D or 3D space.

Calculate kinetic, potential, or total energy from mass, velocity, and height.

Calculate force, mass, or acceleration using Newton's second law F=ma.

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

Find the midpoint between two points in 2D or 3D space.

Look up molecular weight and properties of common chemical compounds.

Calculate p-value from test statistic and distribution type.

Calculate percent error between experimental and theoretical values.

Calculate percentage increase or decrease between two values.

Find the prime factorization of any positive integer.

Solve proportions and find the missing value in a ratio equation.

Calculate the missing side of a right triangle using the Pythagorean theorem.

Simplify ratios, scale ratios, and solve ratio problems.

Perform linear regression analysis with slope, intercept, and R-squared.

Count significant figures and round numbers to specified sig figs.

Calculate square root, cube root, and nth root of any number.

Calculate surface area of common 3D shapes including sphere, cylinder, and cone.

Perform one-sample and two-sample t-tests with t-statistic and p-value.