Math
Percentage, fraction, average and equation calculators.
Free Triangle Slope Calculator
Use our free Triangle Slope Calculator online. Find the slope of a line or right triangle using rise/run, side lengths, or angle. Multiple length units supported. Updated for 2026.
Free Divisibility Test Calculator
Use our free Divisibility Test Calculator online. Check if any number is divisible by 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, or 13. Shows the quotient, remainder, and the divisibility rule used. Fast and accurate. Updated for 2026.
Free Exponential Regression Calculator
Use our free Exponential Regression Calculator online. Find the exponential curve (y = a × b^x) that best models your dataset. Get coefficients a, b, and R-squared instantly. Updated for 2026.
Free Dividing Exponents Calculator
Use our free Dividing Exponents Calculator online. Solve exponent division problems step by step. Supports same-base and different-base exponent division. Updated for 2026.
Free Stem And Leaf Plot Calculator
Free stem and leaf plot calculator online.
Free Square Feet of a Rectangle Calculator
Use our free Square Feet of a Rectangle Calculator online. Calculate rectangle area in square feet instantly with length and width. Supports various units with automatic conversion. Updated for 2026.
Free Surface Area of a Rectangular Pyramid Calculator
Use our free Surface Area of a Rectangular Pyramid Calculator online. Compute base area, lateral surface area, and total surface area of a rectangular pyramid. Supports multiple measurement units with instant results. Updated for 2026.
Free Margin of Error Calculator
Use our free Margin of Error Calculator online. Compute the margin of error for your survey or poll results using confidence level, sample size, and proportion. Updated for 2026.
Free FOIL Calculator
Use our free FOIL Calculator online. Multiply two binomials step by step using the First Outer Inner Last method. Get instant results with clear FOIL steps. Updated for 2026.
Free Subset Calculator
Use our free Subset Calculator online. Generate all subsets of a set, count proper subsets, compute power sets, and find subsets by cardinality. Perfect for students studying set theory and combinatorics. Updated for 2026.
Free Exponential Growth Prediction Calculator
Use our free Exponential Growth Prediction Calculator online. Predict future values, calculate growth rates, or find the time needed to reach a target under exponential growth. Updated for 2026.
Free Sum of Linear Number Sequence Calculator
Use our free Sum of Linear Number Sequence Calculator online. Quickly find the sum and final value of any linear sequence given the initial value, difference, and number of periods. Updated for 2026.
Free Double Angle Identities Calculator
Use our free Double Angle Identities Calculator online. Calculate sin(2θ), cos(2θ), and tan(2θ) instantly with step-by-step solutions. Supports degrees, radians, and π radians. Updated for 2026.
Free Standard Deviation Calculator
Use our free Standard Deviation Calculator online. Compute the mean, variance, and standard deviation for any dataset instantly. Supports population and sample data with step-by-step calculation. Perfect for students, teachers, and data analysis. Updated for 2026.
Free Binary Multiplication Calculator
Multiply binary numbers with our free Binary Multiplication Calculator. Get decimal values and step-by-step instructions. Updated for 2026.
Free Sum of Products Calculator
Use our free Sum of Products Calculator online. Calculate the sum of products of two number series instantly. View individual products and step-by-step expression. Updated for 2026.
Free Collatz Conjecture Calculator
Use our free Collatz Conjecture calculator online. Generate the Collatz (3x+1) sequence for any starting number. See the stopping time, maximum value, and full hailstone sequence instantly. Updated for 2026.
Free Isosceles Triangle Find A Calculator
Use our free Isosceles Triangle Find A Calculator online. Find the missing base of any isosceles triangle using height and area, vertex angle and side B, or height and side B. Updated for 2026.
Free Square Root Calculator
Use our free Square Root Calculator online. Find the square root of any positive number instantly with simplified radical form. Supports perfect square detection and decimal results. Updated for 2026.
Factor Calculator
Use our free Factor Calculator online. Find all positive factors of any number instantly, plus prime factorization, factor pairs, sum, and average. Supports GCF and modulo for two numbers. 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.
RSA Calculator
Use our free RSA Calculator online. Generate RSA keys (public and private), encrypt and decrypt messages using the RSA algorithm. Learn about public-key cryptography with step-by-step results. Updated for 2026.
Free Similar Right Triangles Calculator
Use our free Similar Right Triangles Calculator online. Find missing side lengths and angles of similar right triangles instantly. Enter known values and scale factor to compute all measurements. Updated for 2026.
Free Graphing Quadratic Inequalities Calculator
Use our free Graphing Quadratic Inequalities Calculator online. Graph and solve quadratic inequalities of the form ax²+bx+c > d instantly. Get interval notation, step-by-step solutions, and visual parabola graphs. Updated for 2026.
Free SSA Triangle Calculator
Use our free SSA Triangle Calculator online. Solve the law of sines ambiguous case for side-side-angle triangles. Check triangle existence and congruence. Fast and accurate. Updated for 2026.
Free Solve Similar Triangles Calculator
Use our free Solve Similar Triangles Calculator online. Find the scale factor and all missing side lengths between two similar triangles instantly. Enter any known sides and get all unknown values computed automatically. Updated for 2026.
Free Sample Size Calculator
Use our free Sample Size Calculator online. Determine the minimum sample size needed for statistically significant survey and research results using confidence level, margin of error, and population size. Updated for 2026.
Free Exponent Calculator
Use our free Exponent Calculator online. Calculate any base raised to any power instantly. Supports positive, negative, and fractional exponents with step-by-step breakdown. Get accurate results in seconds. Updated for 2026.
Free Simpsons Diversity Index Calculator
Free simpsons diversity index calculator online.
Free Sampling Distribution Sample Proportion Calculator
Free sampling distribution sample proportion calculator online.
Free Volume Calculator
Use our free Volume Calculator online. Calculate the volume of cubes, rectangular prisms, spheres, hemispheres, cylinders, cones, and square pyramids. Supports multiple length and volume units including mm, cm, m, in, ft, L, US gal, and UK gal. 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 Shannon Entropy Calculator
Use our free Shannon Entropy Calculator online. Calculate information entropy for any probability distribution with up to 10 events. Updated for 2026.
Free Tan-1 Calculator (Inverse Tangent)
Use our free Tan-1 calculator online. Find the inverse tangent (arctan) of any real number instantly. Get results in degrees and radians. Clear up the tan-1 vs arctan vs cotangent confusion. Updated for 2026.
Free Torus Surface Area Calculator
Use our free Torus Surface Area Calculator online. Calculate the surface area of a torus instantly using inner and outer radii. Supports multiple units including mm, cm, m, inches, and feet. Updated for 2026.
Free Segment Area Calculator
Use our free segment area calculator online. Find the area of a circular segment given radius and central angle or radius and height (sagitta). Also computes arc length, chord length, and sagitta. Supports multiple length and area units. Updated for 2026.
Free Cuboid Calculator
Use our free Cuboid Calculator online. Calculate the volume, surface area, and diagonal of a cuboid (rectangular prism). Enter length, width, and height with support for multiple units (mm, cm, m, km, in, ft, yd, mi). Updated for 2026.
Free Trapezoid Angle Calculator
Use our free Trapezoid Angle Calculator online to find unknown angles of a trapezoid using the supplementary angle relationship (adjacent angles sum to 180°). Fast, accurate, and easy to use. Updated for 2026.
Free Tangent Ratio Calculator
Use our free Tangent Ratio Calculator online. Compute the tangent ratio (opposite/adjacent) of any right triangle instantly. Get the angle from the tangent value in degrees or radians. Updated for 2026.
Free Tetrahedron Volume Calculator
Use our free Tetrahedron Volume Calculator online. Calculate volume, height, surface area, surface area to volume ratio, and insphere/midsphere/circumsphere radii from edge length. Supports multiple units. Updated for 2026.
Free Trig Degree Calculator
Use our free Trig Degree Calculator online. Calculate sin, cos, tan, cot, sec, and csc for any angle in degrees or radians. Get instant results for all six trigonometric functions. Updated for 2026.
Free Cubic Inches of a Cylinder Calculator
Use our free Cubic Inches of a Cylinder Calculator online. Calculate the volume or surface area of any cylinder using height, radius, or diameter in any unit. Get accurate results instantly. 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.
Free Inverse Sine (Arcsin) Calculator
Use our free Inverse Sine Calculator online. Find arcsin(x) for any value between -1 and 1 instantly - get the angle in degrees and radians with a handy common values reference table. Updated for 2026.
Free Luhn Algorithm Calculator
Use our free Luhn Algorithm Calculator online. Validate credit card numbers, IMEI codes, and more with the Luhn mod 10 algorithm. Check digits instantly and generate valid check digits. Updated for 2026.
Free Polar to Cartesian Coordinates Calculator
Use our free Polar to Cartesian Coordinates Calculator online. Convert polar coordinates (r, θ) to cartesian coordinates (x, y) instantly. Supports degrees, radians, gradians, turns, and more angle units. Updated for 2026.
Free Integer Calculator
Use our free Integer Calculator online to perform addition, subtraction, multiplication, division, exponent, root, and logarithm operations with integers. Supports negative numbers. Fast and accurate. Updated for 2026.
Free Tangent Angle Calculator
Use our free Tangent Angle Calculator online to compute the tangent (tan) of any angle. Supports degrees, radians, and pi radians with a common values reference table. 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 Isosceles Right Triangle Hypotenuse Calculator
Use our free Isosceles Right Triangle Hypotenuse Calculator online. Enter the equal side length to instantly find the hypotenuse using the Pythagorean theorem. Supports multiple length units. 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 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 Dice Probability Calculator
Calculate dice roll probabilities for polyhedral dice (d4, d6, d8, d10, d12, d20). Find odds for exact values, sums, or thresholds with our free online Dice Probability Calculator. Updated for 2026.
Free Coordinate Grid Calculator
Use our free Coordinate Grid Calculator online. Plot points on a coordinate plane, calculate the distance between coordinates, find the midpoint, slope, and line equation. Supports Cartesian coordinate system with visual SVG grid. Updated for 2026.
Free Simplifying Radicals Calculator
Use our free Simplifying Radicals Calculator online. Simplify any radical expression to its simplest form instantly. Supports square roots, cube roots, and nth roots. Step-by-step solutions with prime factorization. Fast, accurate, and easy to use. Updated for 2026.
Free Multiplying Polynomials Calculator
Use our free Multiplying Polynomials Calculator online. Multiply two one-variable polynomials of degree 1 to 6. Get the simplified product with step-by-step results. Fast and accurate. 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 Triangle Congruence Calculator
Use our free Triangle Congruence Calculator online. Determine if two triangles are congruent using SSS, SAS, ASA, or AAS criteria with automatic unit conversion. Updated for 2026.
Free F-Statistic Calculator
Use our free F-Statistic Calculator online. Compute the F-statistic for variance comparison or multiple regression analysis. Get F-value, p-value, critical values, and hypothesis test results instantly. Updated for 2026.
Free Oblique Triangle Calculator
Use our free Oblique Triangle Calculator online. Solve any oblique triangle - SSS, SAS, ASA, or AAS - find all sides, angles, area, and perimeter. Supports multiple units with instant results. Updated for 2026.
Free Mixed Number Calculator
Use our free Mixed Number Calculator online. Add, subtract, multiply, and divide mixed fractions instantly. Simplify mixed numbers and convert between decimals and mixed numbers with step-by-step solutions. Fast, accurate, and easy to use. Updated for 2026.
Free Area of a Sphere Calculator
Use our free Area of a Sphere Calculator online. Calculate the surface area of any sphere instantly using radius, diameter, volume, or surface-to-volume ratio. Supports multiple units. Updated for 2026.
Free Triangle Proportionality Theorem Calculator
Use our free Triangle Proportionality Theorem Calculator online. Find the missing proportional segment length in a triangle with a parallel intersecting line. Supports multiple length units with auto-conversion. Get step-by-step formula breakdown. Updated for 2026.
Free Absolute Value Calculator
Use our free Absolute Value Calculator online. Find the absolute value of any number instantly. Supports positive, negative, and decimal numbers. Learn how absolute value works with clear examples. Updated for 2026.
Free Terminating Decimals Calculator
Use our free Terminating Decimals Calculator online. Check if a fraction produces a terminating or repeating decimal and see its full decimal representation. Updated for 2026.
Free Normal Approximation Calculator
Use our free Normal Approximation Calculator online. Approximate binomial probabilities using the normal distribution with continuity correction. Get mean, variance, Z-score and probability results. Updated for 2026.
Free Tan Inverse Calculator
Use our free Tan Inverse Calculator online. Calculate arctan(x) instantly in degrees, radians, or gradians. Fast and accurate inverse tangent function tool for finding the angle from any tangent value. Updated for 2026.
Free Row Echelon Form Calculator
Use our free Row Echelon Form Calculator online. Compute the reduced (RREF) or non-reduced (REF) row echelon form of a 2x2 or 3x3 system of equations using Gauss-Jordan elimination. Instant results with matrix display. Updated for 2026.
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 Cylinder Volume Gallons Calculator
Use our free Cylinder Volume Gallons Calculator online. Calculate cylinder volume in US gallons, UK gallons, liters, and more. Fast and accurate with multiple unit options. 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 Isosceles Triangle Angles Calculator
Use our free Isosceles Triangle Angles Calculator online. Compute all angles, side lengths, area, and perimeter of an isosceles triangle instantly. Enter any two known values and get the rest. Fast, accurate, and easy to use for students and geometry enthusiasts. Updated for 2026.
Free Arccos Calculator (Inverse Cosine)
Use our free Arccos Calculator online. Find the inverse cosine of any value between -1 and 1 instantly - get arccos(x) in degrees and radians with a handy common values reference table. Updated for 2026.
Free Adding and Subtracting Polynomials Calculator
Use our free Adding and Subtracting Polynomials Calculator online. Add or subtract two polynomials up to degree 6 instantly. Perfect for algebra students and teachers. Updated for 2026.
Free Matrix Determinant Calculator
Use our free Matrix Determinant Calculator online. Compute the determinant of any 2x2, 3x3, or 4x4 square matrix instantly with step-by-step accuracy. Perfect for linear algebra, engineering, and solving systems of equations. Updated for 2026.
Free Rectangle Scale Factor Calculator
Use our free Rectangle Scale Factor Calculator online to find linear and area scale factors between two rectangles. Fast, accurate, and easy to use. Updated for 2026.
Free Cos Inverse Calculator
Use our free Cos Inverse Calculator online. Compute arccos(x) instantly for any value between -1 and 1. Get results in degrees, radians, gradians, turns, arcminutes, arcseconds, and more. Perfect for trigonometry, geometry, and physics problems. Updated for 2026.
Free Trig Function Calculator
Use our free Trig Function Calculator online. Compute the six trigonometric functions (sin, cos, tan, csc, sec, cot) for any angle in degrees, radians, or pi radians. Instant results with a clean reference table. Updated for 2026.
Free Multiplying Radicals Calculator
Use our free Multiplying Radicals Calculator online. Multiply radical expressions, simplify square roots and cube roots with step-by-step solutions. Updated for 2026.
Free AND Probability Calculator
Use our free AND Probability Calculator online. Calculate the joint probability of two independent or dependent events using the P(A) × P(B) multiplication rule. Updated for 2026.
Free Cubic Regression Calculator
Use our free Cubic Regression Calculator online. Fit a cubic polynomial to your data, compute coefficients and R-squared, and visualize the fitted curve. Accurate. Updated for 2026.
Free Matrix Calculator
Use our free Matrix Calculator online. Compute determinant, inverse, transpose, trace, and rank for 2x2 and 3x3 matrices. Fast, accurate results with a clean matrix input grid. Updated for 2026.
Round to the Nearest Cent Calculator
Use our free Round to the Nearest Cent Calculator online. Instantly round any money amount or number to the nearest cent with our fast and accurate rounding tool. No sign-up required. 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 Sequence Calculator
Use our free Sequence Calculator online. Generate arithmetic, geometric, Fibonacci, prime, and other number sequences instantly. Supports 10+ sequence types. Updated for 2026.
Free Slope Calculator
Use our free Slope Calculator online to find the slope or gradient between two points in the Cartesian coordinate system. Supports slope formula, angle in degrees/radians, percentage grade, distance, and y-intercept. Fast and accurate. Updated for 2026.
Free Surface Area of a Hemisphere Calculator
Use our free Surface Area of a Hemisphere Calculator online. Calculate total surface area, base area, cap area, volume and surface-to-volume ratio of a hemisphere. Supports multiple units (mm, cm, m, km, in, ft, yd, mi). Updated for 2026.
Free Base of a Triangle Calculator
Use our free Base of a Triangle Calculator online. Calculate the base, area, or height of any triangle using the standard triangle area formula. Supports multiple area and length units with instant results. Updated for 2026.
Free Adjoint Matrix Calculator
Use our free Adjoint Matrix Calculator online. Compute the adjugate (adjoint) of a 2x2 or 3x3 square matrix instantly with step-by-step results. 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 Ellipse Standard Form Calculator
Use our free Ellipse Standard Form Calculator online. Find the standard equation, center, vertices, co-vertices, foci, and eccentricity of any ellipse instantly. 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 Round to the Nearest Penny Calculator
Use our free Round to the Nearest Penny Calculator online. Quickly round any money amount to the nearest penny (two decimal places). Supports multiple currencies. Updated for 2026.
Free Right Triangle Area Calculator
Use our free Right Triangle Area Calculator online. Calculate the area of a right triangle instantly using leg lengths. Supports multiple units (mm, cm, m, in, ft). Updated for 2026.
Free AND Calculator
Use our free AND Calculator online. Perform bitwise AND, OR, and XOR operations on binary, octal, or decimal numbers with adjustable bit length. Fast, accurate bitwise calculator for digital logic and programming. Updated for 2026.
Free Area of Quadrilateral Calculator
Use our free Area of Quadrilateral Calculator online. Calculate the area of any quadrilateral - rectangles, squares, parallelograms, rhombuses, trapezoids, kites, or irregular shapes. Supports multiple units and input methods. Updated for 2026.
Free Triangle Degree Calculator
Use our free Triangle Degree Calculator online. Calculate all three angles of any triangle from three sides, two angles, or two sides and the included angle. Uses the law of cosines and angle sum property. Supports mm, cm, m, km, in, ft, yd, mi. Perfect for geometry, trigonometry, and construction. Updated for 2026.
Free Simplify Ratio Calculator
Use our free Simplify Ratio Calculator online. Reduce any ratio to its simplest form instantly. Supports two-number and three-number ratios with multiple output formats including 1:m and n:1 forms. 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.
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