Math
Percentage, fraction, average and equation calculators.
Free Combinations without Repetition Calculator
Use our free Combinations without Repetition calculator online. Calculate C(n,r) the number of ways to choose r elements from n distinct objects without repetition, and optionally generate the full list of combinations. Updated for 2026.
Free Completing the Square Practice
Use our free Completing the Square Practice online. Solve quadratic equations step by step with interactive algebra problems. Generate random practice questions and master this essential method. Updated for 2026.
Free Complex Number to Rectangular Form Calculator
Convert polar complex numbers to a+bi rectangular form with our free calculator. Supports magnitude, phase, degrees and radians. Updated for 2026.
Free Chi-Square Calculator
Use our free Chi-Square Calculator online. Perform the chi-square goodness of fit test to determine if your observed data matches the expected distribution. Get chi-square statistic, p-value, and degrees of freedom instantly. Updated for 2026.
Free Cone Volume Calculator
Use our free Cone Volume Calculator online. Calculate the volume of a right cone or truncated cone (frustum) instantly with our easy-to-use geometry tool. Supports multiple length and volume units with automatic conversion. Updated for 2026.
Free Constant of Proportionality Calculator
Use our free Constant of Proportionality Calculator online. Find the ratio k that relates the dependent variable Y to the independent variable X. Works with any real numbers including decimals and negative values. Updated for 2026.
Free Pascal's Triangle Calculator
Use our free Pascal's Triangle Calculator online. Find any triangle level, generate binomial coefficients, and explore Pascal's triangle patterns. Fast and accurate results. Updated for 2026.
Free Cos-1 Calculator (Arccos)
Use our free Cos-1 Calculator online. Find the inverse cosine (arccos) of any value between -1 and 1 instantly. Supports degrees, radians, gradians, turns, and more angle units with automatic conversion. Updated for 2026.
Free Inverse Modulo Calculator
Use our free Inverse Modulo Calculator online. Find multiplicative or additive modular inverses instantly with step-by-step explanations using the Extended Euclidean Algorithm. Fast, accurate, and easy to use for students, teachers, and cryptography enthusiasts. Updated for 2026.
Free Factoring Trinomials Calculator
Use our free Factoring Trinomials Calculator online to factor quadratic expressions using the AC method. Get step-by-step solutions with integer coefficients. Fast, accurate, and easy to use. Updated for 2026.
Free Foci of Ellipse Calculator
Use our free Foci of Ellipse Calculator online. Find the coordinates of an ellipse's foci given its center, semi-major axis, and semi-minor axis. Fast and accurate. Updated for 2026.
Free Combinations with Repetition Calculator
Use our free Combinations with Repetition Calculator online. Instantly find the number of combinations with repetition using the formula C'(n,r) = (r+n-1)!/(r!(n-1)!). Fast, accurate, and easy to use. Updated for 2026.
Free Combination Calculator
Use our free Combination Calculator online. Calculate nCr (n choose k) for any non-negative integers. Supports optional permutation display with step-by-step factorial breakdown. Updated for 2026.
Free Column Space Calculator
Use our free column space calculator online. Find the dimension and basis vectors of the column space for any matrix up to 4x4. Updated for 2026.
Free Centroid Calculator
Use our free Centroid Calculator online. Calculate the centroid (geometric center) of a triangle or any set of points in 2D space. Includes interactive coordinate plot and step-by-step formula breakdown. Perfect for geometry, engineering, and physics. Updated for 2026.
Free Conic Sections Calculator
Use our free Conic Sections Calculator online. Calculate eccentricity, linear eccentricity, semi-latus rectum and focal parameter for circles, ellipses, parabolas and hyperbolas. Updated for 2026.
Free Circle Calculator
Use our free Circle Calculator online. Calculate the radius, diameter, circumference, and area of any circle instantly. Enter any one value to compute all four with unit conversion support. Updated for 2026.
Free Geometric Sequence Calculator
Use our free Geometric Sequence Calculator online. Find the nth term, common ratio, sum of a geometric series, and infinite sum. Fast and accurate. Updated for 2026.
Free Fraction to Decimal Calculator
Use our free Fraction to Decimal Calculator online. Convert any fraction to a decimal instantly. Supports proper, improper and mixed fractions with customizable rounding up to 16 decimal places. Updated for 2026.
Free Double Angle Formula Calculator
Use our free Double Angle Formula Calculator online. Compute sin(2θ), cos(2θ), and tan(2θ) instantly for any angle in degrees, radians, or π radians. Updated for 2026.
Free Floor Division Calculator
Use our free Floor Division Calculator online. Compute integer division, get the remainder, and compare with regular division. Updated for 2026.
Free Binary Division Calculator
Use our free Binary Division Calculator. Divide binary numbers step-by-step. Supports signed/unsigned 4-64 bit. Ideal for students & pros. Updated for 2026.
Free Gauss-Jordan Elimination Calculator
Use our free Gauss-Jordan Elimination Calculator online. Solve systems of linear equations by converting augmented matrices to reduced row echelon form instantly. Get step-by-step row operations, the final RREF matrix, and the complete solution summary. Updated for 2026.
Free Covariance Calculator
Use our free Covariance Calculator online. Compute sample and population covariance for two paired datasets instantly. Analyze the relationship between X and Y variables with real-time results. Updated for 2026.
Free Bonferroni Correction Calculator
Use our free Bonferroni correction calculator online. Adjust p-values and significance levels for multiple comparisons in statistical hypothesis testing. Updated for 2026.
Free Multiplying Fractions Calculator
Use our free Multiplying Fractions Calculator online. Multiply up to 5 fractions, including simple fractions, mixed numbers, improper fractions, and whole numbers. Updated for 2026.
Free Euler's Formula for Polyhedron Calculator
Use our free Euler's formula for polyhedron calculator online. Find the number of faces, vertices, or edges of any convex polyhedron. Updated for 2026.
Free Dot Plot Calculator
Use our free Dot Plot Calculator online. Create instant dot plots from any dataset - visualize frequency distribution along a number line with summary statistics including mean, median, mode, and range. Fast and accurate. Updated for 2026.
Free Condition Number Calculator
Use our free Condition Number Calculator online. Compute the condition number of a 2x2 or 3x3 square matrix instantly with multiple matrix norms. Determine if your matrix is well-conditioned or ill-conditioned. Updated for 2026.
Free Percent to Goal Calculator
Use our free Percent to Goal Calculator online. Find out what percentage of your goal you have achieved in seconds. Calculate progress toward savings, tasks, or any target. Updated for 2026.
Free Quadratic Regression Calculator
Use our free Quadratic Regression Calculator online. Fit a parabola of best fit to your data, compute quadratic regression coefficients and R-squared, and visualize the fitted curve on a scatter plot. Accurate. Updated for 2026.
Free Greatest Common Factor Calculator
Use our free Greatest Common Factor Calculator online. Find the GCF of two numbers instantly using the Euclidean algorithm. Supports large integers. Learn how to calculate GCF step by step. Updated for 2026.
Free Negative Binomial Distribution Calculator
Use our free Negative Binomial Distribution Calculator online. Compute the probability of requiring n trials to achieve r successes, plus mean, variance, and standard deviation of the Pascal distribution. Updated for 2026.
Free Length of a Rectangle Calculator
Use our free Length of a Rectangle Calculator online. Find the missing length of a rectangle using width and area, perimeter, or diagonal. Fast, accurate calculations with unit conversion support. Updated for 2026.
Free Percent Error Calculator
Use our free percent error calculator online. Quickly find the relative percentage error between observed and true values. Updated for 2026.
Free Divide Complex Numbers Calculator
Use our free divide complex numbers calculator online to compute the quotient of two complex numbers in rectangular or polar form. Fast, accurate, and supports mixed forms. Updated for 2026.
Free Polar Form Calculator
Use our free Polar Form Calculator online to convert complex numbers from rectangular to polar form. Fast, accurate, and easy to use. Supports both degrees and radians. Updated for 2026.
Free Matrix Multiplication Calculator
Use our free Matrix Multiplication Calculator online. Multiply two matrices up to 3x3 in size instantly. Perfect for students learning linear algebra. Updated for 2026.
Free Cramer's Rule Calculator
Use our free Cramer's Rule Calculator online. Solve 2x2 and 3x3 systems of linear equations using determinant-based methods. Instant results with clear step-by-step determinants. Updated for 2026.
Free Round to the Nearest Thousand Calculator
Use our free Round to the Nearest Thousand Calculator online. Round any number to the nearest thousand, ten thousand, or hundred thousand instantly with multiple rounding modes. Fast, accurate, and easy to use for students and teachers. Updated for 2026.
Free Permutation With Repetition Calculator
Free permutation with repetition calculator online. Easy to use.
Free Percentage Increase Calculator
Use our free Percentage Increase Calculator online. Calculate the percentage increase from an initial value to a final value, or find the final value given an initial value and percentage increase. Updated for 2026.
Free Cofactor Matrix Calculator
Use our free Cofactor Matrix Calculator online. Compute the matrix of cofactors for any 2x2 or 3x3 square matrix instantly with step-by-step results. Updated for 2026.
Free Confidence Interval Calculator
Use our free Confidence Interval Calculator online. Compute confidence intervals for population means and proportions with any confidence level. Updated for 2026.
Free Hexagonal Pyramid Calculator
Use our free Hexagonal Pyramid Calculator online. Compute the volume and surface area (face, base, lateral, total) of a regular hexagonal pyramid instantly. Supports multiple length, area, and volume units with automatic conversion. Updated for 2026.
Free Pythagorean Triples Calculator
Use our free Pythagorean Triples Calculator online. Check if three numbers form a Pythagorean triple or generate triples using Euclid's formula. Instant results with step-by-step explanations. Updated for 2026.
Free Binomial Distribution Calculator
Use our free Binomial Distribution Calculator online. Calculate the probability of a specific number of successes in n independent trials with probability p. Compute mean, variance, and standard deviation. Updated for 2026.
Free Midsegment of a Triangle Calculator
Use our free Midsegment of a Triangle calculator online. Quickly find the midsegment length or base side length using the triangle midsegment theorem. Updated for 2026.
Free Ellipse Circumference Calculator
Use our free Ellipse Circumference Calculator online. Calculate the perimeter of any ellipse using the semi-major and semi-minor axes. Instant results with high-precision formula based on Ramanujan's approximation. Updated for 2026.
Free Proportion Calculator
Use our free Proportion Calculator online. Find the missing value in a proportion or check if two ratios are equivalent. Updated for 2026.
Free Chinese Remainder Theorem Calculator
Use our free Chinese Remainder Theorem Calculator online. Solve systems of linear congruences with step-by-step solutions using the CRT algorithm. Find x modulo N instantly for 2 to 6 equations. Updated for 2026.
Free Quarter Circle Calculator
Use our free Quarter Circle Calculator online. Instantly compute chord, arc length, perimeter, quarter area, and external area from any radius. Updated for 2026.
Free Mean Median Mode Calculator
Use our free Mean Median Mode Calculator online. Compute mean, median, mode, range, and midrange for any dataset instantly. Supports comma, space, or newline-separated values with clean results. Updated for 2026.
Free Rational Exponents Calculator
Use our free Rational Exponents Calculator online. Calculate any base raised to a rational power instantly. Supports fractions, decimals, and negative exponents. Updated for 2026.
Free Galileo's Paradox of Infinity Calculator
Use our free Galileo's Paradox of Infinity calculator online. Explore infinite sets, one-to-one correspondence, and cardinality. Understand why natural numbers and perfect squares are the same size. Updated for 2026.
Free Inverse Variation Calculator
Use our free Inverse Variation Calculator online. Calculate inverse proportionality between two variables using y = k/x. Find the constant of variation k for any x-y pair and solve inverse variation equations instantly. Updated for 2026.
Free Confusion Matrix Calculator
Use our free Confusion Matrix Calculator online. Compute accuracy, precision, recall, F1 score, and other key classification metrics from TP, FP, FN, and TN values. Updated for 2026.
Free Mode Calculator
Use our free Mode Calculator online. Find the modal value of any dataset with our easy-to-use statistics calculator. Supports multimodal, bimodal, and no-mode datasets with a frequency table. Updated for 2026.
Free Class Width Calculator
Use our free Class Width Calculator online. Quickly find the class width for your data distribution using the formula (max - min) / n. Perfect for histograms, frequency distributions, and statistical analysis. Updated for 2026.
Free Radius of a Cylinder Calculator
Use our free Radius of a Cylinder Calculator online. Find the radius of a right circular cylinder from volume and height, lateral surface area and height, or base surface area. Supports multiple metric and imperial units with real-time results. Updated for 2026.
Free Percentage Calculator
Use our free Percentage Calculator online. Calculate percentages, find what percent one number is of another, compute percentage increase or decrease - all in one tool. Updated for 2026.
Free Corner Point Calculator
Use our free Corner Point Calculator online. Solve linear programming problems by finding corner points of the feasible region and optimal objective function values. Supports up to 5 constraints with maximize/minimize. Updated for 2026.
Free Consecutive Integers Calculator
Use our free Consecutive Integers Calculator online. Find consecutive integers whose sum or product equals a target value. Supports even and odd parity. Fast, accurate, and easy to use. Updated for 2026.
Free Cosine Similarity Calculator
Use our free Cosine Similarity Calculator online. Compute the cosine similarity, cosine distance, and angle between two vectors instantly with step-by-step results. Perfect for machine learning and data science. Updated for 2026.
Free Rectangular to Polar Coordinates Calculator
Use our free Rectangular to Polar Coordinates Calculator online. Convert Cartesian coordinates (x, y) to polar notation (r, θ) instantly with degrees, radians, gradians, and more. Updated for 2026.
Free Birthday Paradox Calculator
Use our free Birthday Paradox calculator online. Calculate the probability that at least two people in any group share a birthday with clear mathematical explanation. Updated for 2026.
Free Comparing Fractions Calculator
Use our free Comparing Fractions Calculator online. Compare two fractions with different denominators instantly. Get step-by-step solutions and visual comparison results with decimal equivalents. Updated for 2026.
Free Rotation Calculator
Use our free Rotation Calculator online. Rotate points around the origin or an arbitrary pivot in 2D space. Supports degrees, radians, and multiple angle units for up to 10 points simultaneously. Updated for 2026.
Free Perfect Square Calculator
Use our free Perfect Square Calculator online. Check if any number is a perfect square instantly. See the square root, step-by-step verification, and learn what makes a number a perfect square. Updated for 2026.
Free Chebyshev's Theorem Calculator
Use our free Chebyshev's Theorem Calculator online. Compute probability bounds using Chebyshev's inequality for any distribution with known variance. Updated for 2026.
Free Correlation Coefficient Calculator
Use our free Correlation Coefficient Calculator online. Compute Pearson and Spearman correlation coefficients instantly from your X and Y data values. Includes interpretation of correlation strength using Evan's scale. Updated for 2026.
Free Lagrange Error Bound Calculator
Use our free Lagrange Error Bound Calculator online. Compute the upper bound on the error when approximating a function with a Taylor series. Enter the polynomial degree, evaluation point, center, and max derivative value. Updated for 2026.
Free Perfect Square Trinomial Calculator
Check if your quadratic trinomial is a perfect square with our free Perfect Square Trinomial Calculator. Get the factored binomial. Fast. Updated for 2026.
Free ABC Triangle Calculator
Use our free ABC Triangle Calculator online. Find all missing sides and angles in any right triangle instantly using the Pythagorean theorem and trigonometry. Supports multiple length and angle units. Updated for 2026.
Free Length of a Line Segment Calculator
Use our free Length of a Line Segment Calculator online. Instantly calculate the distance between two points in a 2D plane using the coordinate geometry distance formula. Supports any coordinate pairs with step-by-step breakdown. Updated for 2026.
Free Percentage Change Calculator
Use our free percentage change calculator online. Quickly find the percent change between two values and determine if it is an increase or decrease. Updated for 2026.
Free Quartic Regression Calculator
Free quartic regression calculator online.
Free McNemar's Test Calculator
Use our free McNemar's Test Calculator online. Perform standard test, with Edwards or Yates correction, or exact binomial test for paired binomial data. Calculate χ² test statistic and p-value on 2×2 contingency tables. Updated for 2026.
Free Area of an Oblique Triangle Calculator
Use our free Area of an Oblique Triangle Calculator online. Calculate triangle area with any known data: three sides (SSS), two sides and included angle (SAS), two angles and included side (ASA), or base and height. Supports multiple length and angle units. Updated for 2026.
Free Permutation without Repetition Calculator
Use our free Permutation without Repetition Calculator online. Instantly calculate the number of permutations nPr using the formula P(n,r) = n!/(n-r)!. Fast, accurate, and easy to use. Updated for 2026.
Free Lateral Surface Area of a Cylinder Calculator
Use our free Lateral Surface Area of a Cylinder Calculator online. Quickly find the lateral surface area using radius and height measurements in any unit. Updated for 2026.
Perimeter of a Rectangle with Given Area Calculator
Use our free Perimeter of a Rectangle with Given Area Calculator online. Find the perimeter of a rectangle using its area and one known side. Supports multiple units and provides fast, accurate calculations. Updated for 2026.
Free Reference Angle Calculator
Use our free Reference Angle Calculator online. Find the acute reference angle for any angle in degrees or radians, with quadrant detection and step-by-step formula. Updated for 2026.
Free Height of a Square Pyramid Calculator
Use our free Height of a Square Pyramid Calculator online. Find the altitude of any right square pyramid using base edge, slant height, volume, lateral edge, or total surface area. Fast and accurate. Updated for 2026.
Free Miracle Calculator
Use our free Miracle Calculator online. Based on Littlewood's law of miracles, find out how many extraordinary events you can expect in any time period with this statistical probability tool. Updated for 2026.
Free Probability Fraction Calculator
Free probability fraction calculator online.
Free Moneyline Odds Calculator
Use our free Moneyline Odds Calculator online. Calculate implied probability, expected payout, and net profit from American moneyline odds instantly. Updated for 2026.
Free Ratio Calculator
Use our free Ratio Calculator online. Simplify ratios, find equivalent ratios, scale ratios up or down, and convert to 1:n or n:1 form. Updated for 2026.
Free Critical Value Calculator
Use our free Critical Value Calculator online. Find Z, t-Student, chi-square, and F-distribution critical values for one-tailed and two-tailed hypothesis tests. Features automatic significance level tuning and adjustable degrees of freedom. Updated for 2026.
Free Lowest Common Denominator Calculator
Use our free Lowest Common Denominator Calculator online to find the LCD of two or more fractions. Get equivalent fractions and step-by-step solutions instantly. Fast and accurate. Updated for 2026.
Free Matrix Norm Calculator
Use our free Matrix Norm Calculator online. Compute the 1-norm, 2-norm, infinity norm, Frobenius norm, and max norm for any matrix up to 3x3. Updated for 2026.
Free Common Factor Calculator
Use our free Common Factor Calculator online. Find the common factors and greatest common factor (GCF) of any two positive integers instantly. View complete factor lists for each number. Updated for 2026.
Free Post-Test Probability Calculator
Use our free Post-Test Probability Calculator online. Compute pre-test probability, likelihood ratios, and post-test probability from sensitivity and specificity or direct LR. Fast and accurate. Updated for 2026.
Free AAS Triangle Calculator
Use our free AAS Triangle Calculator online. Solve Angle-Angle-Side triangles instantly using the law of sines. Get missing angle, sides b and c, height, area, and perimeter. Updated for 2026.
Free Cos 2 Theta Calculator
Use our free Cos 2 Theta Calculator online. Calculate cos(2θ) instantly from any angle θ. Supports degrees, radians, and π radians. Perfect for trigonometry, pre-calculus, and physics problems. Updated for 2026.
Free Perimeter of a Triangle with Vertices Calculator
Use our free Perimeter of a Triangle with Vertices Calculator online. Compute the perimeter of any triangle using the coordinates of its vertices with the distance formula. Get side lengths AB, BC, and CA instantly. Perfect for geometry students and coordinate math. Updated for 2026.
Free Ratios of Directed Line Segments Calculator
Use our free Ratios of Directed Line Segments Calculator online. Find point coordinates that partition a line segment in a given ratio internally or externally, or find the ratio from a point. Fast and accurate. Updated for 2026.
Round to the Nearest Ten Calculator
Use our free Round to the Nearest Ten Calculator online. Instantly round any number to the nearest 10 with our fast and accurate rounding tool. No sign-up required. Updated for 2026.
Free Binary Fraction Converter
Use our free Binary Fraction Converter online. Convert decimal fractions to binary fractions and binary fractions back to decimal with customizable precision. Perfect for computer science, math, and digital electronics. Updated for 2026.
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