Mathematics
Percentages, fractions, equations and numbers
27 calculators
In this category
Percentage Work out a percentage of a number, a share, a percentage change, or add and subtract a percentage — with every step shown. Fractions Add, subtract, multiply and divide fractions, reduce them to lowest terms, and convert between fractions and decimals. Ratios Simplify a ratio, share a total between any number of parts, or solve a proportion by cross multiplication. Quadratic formula Solve any quadratic equation ax² + bx + c = 0 for its real or complex roots, with the discriminant and every step shown. Log calculator Solve log_b(x) = y for x, y or the base b, with natural log (base e) supported directly. Exponent calculator Solve aⁿ = b for the result, the base or the exponent, with the expanded multiplication shown for whole-number powers. LCM calculator Find the least common multiple of a list of integers, with the prime factorization of each number shown. GCF calculator Find the greatest common factor of a list of integers, and every factor they share, not just the largest. Factor calculator List every divisor of a number, its factor pairs and its prime factorization, all in one place. Scientific notation Convert any number between decimal, scientific notation, E-notation and engineering notation, all shown together. Long division Divide two whole numbers with the quotient, remainder and full long-division steps, digit by digit, shown out. Permutations & combinations Find both the number of permutations (order matters) and combinations (order does not) of r items chosen from n. Confidence interval Find the confidence interval or margin of error for a sample, given its mean, standard deviation and size. P-value calculator Convert a z-score to a p-value, in five common forms at once, or go the other way from a p-value to a z-score. Binary calculator Add, subtract, multiply or divide two binary numbers, or convert a binary number to decimal, with the result shown in both bases. Hex calculator Add, subtract, multiply or divide two hexadecimal numbers, or convert hex to decimal, with the result shown in both bases. Circle calculator Find the radius, diameter, circumference and area of a circle from any one of the four values. Triangle solver Solve any triangle from three known sides, two sides and the angle between them, or two angles and the side between them. Slope calculator Find the slope, angle, distance and equation of a line from two points, or from one point and a known slope. Distance calculator Find the distance between two points in a 2D or 3D plane, or between two latitude/longitude coordinates on Earth. Probability calculator Find the probability of two events combined — union, intersection, complement — or a probability under the normal distribution. Matrix calculator Add, subtract, multiply, transpose, or find the determinant and inverse of a matrix, entered row by row. Scientific calculator Type a full expression — trigonometry, logarithms, powers and roots — and get an exact result, with proper order of operations. Function study A full study of a polynomial function — domain, zeros, derivative, critical points, second derivative and convexity — the way a class works through it. Simplex solver Solve a linear programming problem — maximize or minimize a linear objective under "less than or equal to" constraints. Statistics Paste a series of numbers and read its mean, median, spread, quartiles, skewness and outliers at a glance. Discount Find the sale price, the percentage off, or the price before the discount — including stacked offers and sales tax.
Everyday and school-level maths: percentages and percentage change, fractions, ratios and proportion, quadratic equations, greatest common divisor and prime factors.
Every result comes with the steps written out, so you can check the working rather than copy an answer.