Math
Math calculators for arithmetic, algebra, geometry and trigonometry: percentages, fractions, equation solvers, areas, volumes and more. Most tools show the steps or the formula behind the answer, which makes them useful for checking homework as well as everyday sums.
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- Geometric Sequence Calculator Find the nth term and the sum of a geometric sequence.
- Slope / Grade Calculator Calculate slope from rise and run as a percentage grade, angle in degrees and ratio.
- Circle Sector Calculator Calculate the area and arc length of a circular sector from radius and angle.
- 3D Distance Calculator Calculate the straight-line distance between two points in 3D space.
- Pythagorean Theorem Calculator Calculate the hypotenuse, area and perimeter of a right triangle from its two legs (a² + b² = c²).
- Logarithm Calculator Calculate the logarithm of a value in your chosen base, its natural log (ln) and base-10 log.
- Triangle Area (Heron) Calculator Calculate a triangle’s area (Heron’s formula) and perimeter from its three sides.
- Palindrome Checker Check whether text reads the same forwards and backwards.
- Midpoint Calculator Find the midpoint between two points on a coordinate plane.
- Ellipsoid Volume Calculator Calculate the volume of an ellipsoid from its three semi-axes.
- Pyramid Volume Calculator Calculate the volume and surface area of a square-based pyramid.
- Percent Of Calculator Calculate what a percentage of a value is.
- Arithmetic Sequence Calculator Find the nth term and the sum of an arithmetic sequence.
- Cube Volume and Surface Area Calculator Compute the volume, total surface area, face diagonal and space diagonal of a cube from its edge length.
- Parallelogram Calculator Calculate the area and perimeter of a parallelogram from its base, height and side.
- GCD & LCM Calculator Calculate the greatest common divisor (GCD) and least common multiple (LCM) of two integers.
- Line Equation Calculator Find the slope, y-intercept and equation of a line through two points.
- Tetrahedron Calculator Calculate the volume and surface area of a regular tetrahedron from its edge.
- Roman Numeral Converter Convert a number between 1 and 3999 into Roman numerals.
- Percentage Calculator Percent change, percent of, and ratio calculations.
- Rectangle Calculator Calculate a rectangle’s area, perimeter and diagonal from its width and height.
- Trapezoid Area Calculator Calculate a trapezoid’s area from its two parallel sides (bases) and height.
- Frustum Volume Calculator Calculate the volume of a conical frustum (truncated cone) from its two radii and height.
- Parabola Vertex Calculator Calculate the vertex of a parabola y = ax²+bx+c.
- Angle Between Two Vectors Calculator Computes the angle between two 3D vectors using the dot product formula, in both degrees and radians.
- Rhombus Calculator Calculate the area and perimeter of a rhombus from its two diagonals.
- Euler's Totient Calculator Calculate Euler's totient φ(n): how many integers from 1 to n are coprime with n.
- Point to Line Distance Calculator Calculate the distance from a point to a line.
- Vector Magnitude Calculator Calculate the magnitude (length) of a 3D vector.
- Linear Equation Solver (2×2) Solve a system of two linear equations in two unknowns.
- 2×2 Matrix Determinant Calculator Calculate the determinant and trace of a 2×2 matrix.
- Collatz Conjecture Calculator Compute the Collatz (3n+1) steps and peak value.
- Cuboid Volume Calculator Calculate the volume, surface area and space diagonal of a cuboid (rectangular box).
- Modular Exponentiation Calculator Compute base^exp mod m efficiently.
- Continued Fraction Calculator Expand a decimal number into its continued fraction terms and best rational convergent.
- Fraction to Decimal Converter Convert a fraction to its decimal value and percentage.
- Antilog Calculator Calculate the antilogarithm (base raised to a value).
- Aspect Ratio Calculator Calculate the missing dimension and the simplified ratio while keeping a width-to-height proportion.
- Scientific Notation Converter Convert a number into scientific notation (a × 10ⁿ) and E-notation.
- Circle Segment Calculator Calculate the area of a circular segment from radius and central angle.
- Percentage Difference Calculator Calculate the percentage difference between two numbers.
- Percentage Error Calculator Calculate percentage error between a measured value and the true (accepted) value.
- Equilateral Triangle Calculator Calculate the area, height and perimeter of an equilateral triangle from its side.
- Torus Calculator Calculate the volume and surface area of a torus from its center and tube radius.
- Twin Primes Finder Lists all twin prime pairs (primes differing by 2) up to a chosen limit and counts them.
- LCM of a List Calculator Find the least common multiple and greatest common divisor of a whole list of positive integers entered at once.
- Distance Between Two Points Calculate the straight-line distance between two points on a plane.
- Percent Change Calculator Calculate the percentage change from an old value to a new value.
- Average Calculator Calculate the average (mean), count and sum of a list of numbers.
- Polygon Angle Calculator Calculate the interior angle and angle sum of a regular polygon.
- Turkey City Distance Calculator Calculate the great-circle (straight-line) distance between two Turkish provinces in kilometers and miles.
- Simplify Ratio Calculator Reduce a ratio to its lowest terms and show its decimal value.
- Regular Polygon Area Calculator Calculate the area and perimeter of a regular polygon from its sides and side length.
- Sphere Volume Calculator Calculate a sphere’s volume and surface area from its radius.
- Annulus Area Calculator Calculate the area of an annulus (ring) from its outer and inner radii.
- Fibonacci Calculator Find the nth Fibonacci number and the Fibonacci sequence up to that term.
- Exponential Growth Calculator Calculate exponential growth of a value over a number of periods at a fixed rate.
- Nth Prime Number Calculator Find the nth prime number.
- Weighted Average Calculator Calculate a weighted average from values and their weights.
- Golden Ratio Calculator Split a length into golden-ratio segments (φ ≈ 1.618).