Mathematics

Percentage Calculator Solve everyday percentage problems — find a percent, a share or a change. Mathematics Average Calculator Find the mean, median, mode, sum and range of a list of numbers. Mathematics Fraction Simplifier Reduce a fraction to its lowest terms and as a decimal. Mathematics Ratio Calculator Solve a proportion A:B = C:D for the missing value. Mathematics LCM & GCD Calculator Find the LCM and GCD (HCF) of a set of integers. Mathematics Quadratic Equation Solver Solve ax² + bx + c = 0 with real or complex roots. Mathematics Right Triangle Calculator Find the hypotenuse, area, perimeter and angles of a right triangle. Mathematics Circle Calculator Find a circle’s area, circumference and diameter from the radius. Mathematics Percent Error Calculator Calculate the percent error between an experimental and true value. Mathematics Standard Deviation Calculator Find mean, variance and standard deviation of a data set. Mathematics Prime Number Checker Check whether a number is prime and see its factors. Mathematics Roman Numeral Converter Convert numbers to Roman numerals and back — just type either one. Mathematics Scientific Calculator Evaluate math expressions with functions, powers, roots, logs and trigonometry. Mathematics Percentage Increase / Decrease Calculator Calculate the percentage increase or decrease between two values. Mathematics Number to Words Converter Spell any number out in words, including decimals and negatives. Mathematics Decimal to Fraction Convert a decimal to a simplified fraction, and back. Mathematics Bitwise Calculator Compute AND, OR, XOR, NOT and bit shifts on two integers. Mathematics Statistics Calculator Find the mean, median, mode, range and standard deviation. Mathematics Permutations & Combinations Calculate permutations (nPr) and combinations (nCr). Mathematics Sample Size Calculator Find how many people to survey for a given confidence level and margin of error. Mathematics Weighted Average Calculator Calculate a weighted average from values and their weights. Mathematics Pythagorean Theorem Calculator Find the hypotenuse or a missing leg of a right triangle with a² + b² = c². Mathematics Z-Score Calculator Find the z-score (standard score) and percentile of a value. Mathematics Exponent & Logarithm Calculator Raise a base to a power, or take the logarithm of a number to any base. Mathematics Distance & Midpoint Calculator Find the distance, midpoint and slope between two points. Mathematics Fraction Calculator Add, subtract, multiply or divide fractions and mixed numbers, with steps. Mathematics Number Sequence Calculator Detect arithmetic or geometric sequences and find the nth term and sum. Mathematics Probability Calculator Work out the probability of an event, or of two independent events. Mathematics Linear Regression Calculator Find the least-squares line of best fit, correlation and R² for your data. Mathematics Significant Figures Calculator Round a number to significant figures or decimals, and count its sig figs. Mathematics Trigonometry Calculator Find sine, cosine, tangent and their reciprocals for any angle. Mathematics Matrix Calculator Find the determinant, inverse, transpose or trace of a matrix. Mathematics Proportion Calculator Solve a proportion a : b = c : d by leaving the unknown value blank. Mathematics Modulo Calculator Find a mod n — the remainder and quotient of a division. Mathematics Triangle Area Calculator Find the area of a triangle from base and height, three sides, or two sides and an angle. Mathematics Volume Calculator Find the volume of a cube, box, sphere, cylinder or cone. Mathematics Prime Factorization Calculator Break a whole number into its prime factors. Mathematics Fibonacci Calculator Generate the Fibonacci sequence, the nth term and the running sum. Mathematics A/B Test Significance Calculator Test whether the difference between two conversion rates is statistically significant. Mathematics