682 calculators covering algebra, geometry, trigonometry, statistics, and more
Solve absolute value equations of the form |ax + b| = c
Calculate the absolute value of any real number. |x| = distance from zero on the number line.
Calculate the area of an annulus (ring) using A = pi(R² - r²).
Calculate the length of a circular arc using s = r * theta (radians) or s = (theta / 360) * 2pir.
Calculate the inverse tangent (arctan) of a value in degrees or radians.
Calculate the area of rectangles, triangles, and circles using standard geometric formulas.
Calculate the arithmetic mean (average) of up to 8 numbers.
Convert numbers between any two bases from 2 to 36 (binary, octal, decimal, hex, and more).
Perform addition, subtraction, multiplication, and division on binary numbers.
Convert between decimal, binary, hexadecimal, and octal number systems
Calculate the central angle of a circle given arc length and radius: theta = s / r.
Calculate the chord length of a circle using c = 2r sin(theta/2).
Calculate the tangent length from an external point to a circle using t = sqrt(d² - r²).
Calculate the circumference, radius, and area of a circle from its diameter.
Calculate combinations (nCr) and permutations (nPr) for choosing and ordering items.
Calculate the surface area of a cone using SA = pir² + pirl.
Calculate the volume of a cone using V = 1/3pir²h.
Calculate cosine (cos) and inverse cosine (arccos) of an angle
Calculate the cosine of an angle in degrees or radians.
Calculate cotangent (cot) and inverse cotangent (arccot) of an angle
Calculate cosecant (csc) and inverse cosecant (arccsc) of an angle
Calculate volume, surface area, and space diagonal of a cube.
Calculate the cube root of any real number. Supports negative inputs.
Calculate the volume of a cylinder using V = πr²h.
Convert a decimal number to its simplest fractional form.
Solve direct variation problems using y = kx — find k from known values or find y from k and x
Calculate the Euclidean distance between two points in 2D space.
Calculate sin(2θ), cos(2θ), and tan(2θ) with identity forms shown
Calculate the area of an ellipse using A = πab, where a and b are the semi-major and semi-minor axes.
Front-end estimation by rounding to the highest place value
Calculate base raised to an exponent with step-by-step breakdown
Calculate the factorial of a non-negative integer n. n! = n × (n−1) × ... × 1.
Add, subtract, multiply, and divide fractions with step-by-step simplification.
Calculate the volume of a conical frustum using V = 1/3pih(R² + Rr + r²).
Evaluate a polynomial function f(x) at a given x — supports linear, quadratic, and cubic functions
Calculate the Greatest Common Factor (GCF) of two or more numbers, also known as the greatest common divisor (GCD).
Calculate volume and surface area of a hemisphere.
Calculate area, side length, and perimeter of a regular hexagon.
Solve linear inequalities of the form ax + b <op> 0
Calculate the inscribed angle given the central angle subtending the same arc.
Solve inverse variation problems using y = k/x — find k from known values or find y from k and x
Calculate the area of a kite using A = d₁d₂/2, where d₁ and d₂ are the diagonals.
Solve triangles using the law of cosines: c² = a² + b² - 2ab·cos(C)
Solve triangles using the law of sines: a/sin(A) = b/sin(B) = c/sin(C)
Calculate the Least Common Multiple (LCM) of up to 4 numbers using the GCD method.
Solve linear equations in the form ax + b = c. Find x step by step.
Calculate the logarithm of a number with any base
Multiply two 2x2 matrices. Compute the product matrix entry by entry.
Calculate the mean (average), median, and mode of a set of numbers.
Calculate the midpoint between two points in 2D space.
Compute the remainder of a divided by b
Round a number to the nearest arbitrary value
Calculate area, side length, and perimeter of a regular octagon.
Calculate the area of a parallelogram using A = bh.
Calculate percentages easily. Find what percent one number is of another, or find a percentage of a number.
Calculate the percentage increase or decrease between two values
Calculate the percentage difference between two numbers
Calculate percentage increase between two numbers. Find how much a value has grown and the percentage change.
Evaluate a polynomial a₀ + a₁x + a₂x² + a₃x³ + ... at a given x value
Find the prime factorization of any positive integer up to 10 million.
Calculate the volume of any prism using V = Bh, where B is the base area.
Calculate the volume of a pyramid using V = 1/3Bh, where B is the base area.
Verify sin²θ + cos²θ = 1 and explore related Pythagorean identities
Calculate hypotenuse or missing side using a² + b² = c²
Solve the quadratic equation ax² + bx + c = 0 with step-by-step discriminant and roots
Solve quadratic equations using the quadratic formula x = (-b ± √(b² - 4ac)) / 2a
Generate random integers or decimals within a specified range.
Simplify ratios, compare ratios, and find missing values in proportions.
Calculate the diagonal of a rectangle using d = sqrt(l² + w²).
Calculate volume and surface area of a rectangular prism (cuboid).
Calculate the area of a regular polygon using A = (n x s²) / (4 x tan(pi/n)).
Calculate the area of a rhombus using A = d₁d₂/2, where d₁ and d₂ are the diagonals.
Calculate slant height, volume, and surface area of a right circular cone.
Convert between Roman numerals and Arabic numbers
Round a number to a specified number of decimal places
Convert any number to scientific notation (coefficient × 10^exponent)
Convert a number to and from scientific notation
Calculate secant (sec) and inverse secant (arcsec) of an angle
Calculate the area of a circular sector using A = (theta / 360) x pir².
Calculate the area of a circular segment using A = r²/2 (theta - sin(theta)).
Round any number to a specified number of significant figures.
Round a number to a specified number of significant figures
Combine like terms: ax^n + bx^n = (a+b)x^n
Calculate sine (sin) and inverse sine (arcsin) of an angle
Calculate the slant height of a cone or pyramid using l = sqrt(h² + r²).
Calculate the slope, y-intercept, and line equation between two points on a coordinate plane.
Calculate volume and surface area of a sphere.
Calculate the volume of a sphere using V = 4/3 π r³.
Calculate the square root of any number. Get the exact value and handle negative inputs with error handling.
Calculate the population and sample standard deviation of a set of numbers.
Calculate the surface area of cubes, spheres, and cylinders.
Solve a 2x2 system of linear equations: a₁x + b₁y = c₁, a₂x + b₂y = c₂
Calculate tangent (tan) and inverse tangent (arctan) of an angle
Calculate the tangent of an angle in degrees or radians.
Calculate the volume of a torus (donut shape) using V = 2pi²Rr².
Calculate the area of a trapezoid using A = (a + b)h / 2.
Calculate triangle area using base & height (A = ½bh) or Heron's formula with three sides.
Calculate volume and surface area of a triangular prism.
Calculate volume for cubes, cylinders, spheres, cones, and rectangular prisms.
Calculate the z-score (standardized score) using z = (x - μ) / σ. Find how many standard deviations a value is from the mean.