All Calculators
39 fast calculators for education, geometry, and algebra.
Education
Percentage Of Calculator
Calculate x% of any value instantly.
Percentage Change Calculator
Find increase or decrease percentage between two values.
Rule of Three Calculator
Solve proportions quickly: if a relates to b, find x for c.
Average Calculator (4 values)
Compute the arithmetic mean for four numbers.
GCD Calculator
Find the greatest common divisor (GCD / GCF) of two integers.
LCM Calculator
Find the least common multiple (LCM) of two integers.
Fraction Simplifier
Reduce fractions to simplest form and view decimal value.
Ratio Calculator
Simplify or scale ratios.
Fraction to Decimal Calculator
Convert a fraction to decimal form.
Decimal to Fraction Calculator
Convert a decimal to a simplified fraction.
Decimal to Percentage Calculator
Convert decimal to percentage and vice versa.
Geometry
Rectangle Area Calculator
Compute area and perimeter of a rectangle.
Triangle Area Calculator
Find triangle area from base and height.
Circle Area Calculator
Compute area and circumference of a circle from radius.
Trapezoid Area Calculator
Calculate trapezoid area using both bases and height.
Cube Volume Calculator
Find cube volume from side length.
Cylinder Volume Calculator
Calculate cylinder volume from radius and height.
Sphere Volume Calculator
Calculate the volume of a sphere from its radius.
Cone Volume Calculator
Calculate the volume of a cone from radius and height.
Rectangular Prism Volume Calculator
Calculate volume of a rectangular prism (box).
Rectangular Prism Surface Area Calculator
Calculate the surface area of a rectangular prism.
Sphere Surface Area Calculator
Calculate the surface area of a sphere.
Cube Surface Area Calculator
Calculate the surface area of a cube.
Cylinder Surface Area Calculator
Calculate the total surface area of a cylinder.
Algebra
Quadratic Formula Calculator
Solve quadratic equations ax² + bx + c = 0.
Distance Between Two Points Calculator
Calculate distance between two points in 2D space.
Slope Calculator
Calculate the slope between two points.
Exponent Calculator
Calculate powers and exponents.
Root Calculator
Calculate square root, cube root, or nth root.