Math & Geometry calculators
Percentages, statistics, fractions, number systems, areas and volumes.
- Percentage Calculator
Finds X% of a number.
- What Percent Is X of Y
Finds what percentage one number is of another.
- Percentage Change Calculator
Calculates the percentage increase or decrease.
- Percentage Increase Calculator
Adds a percentage to a number.
- Percentage Decrease Calculator
Subtracts a percentage from a number.
- Percentage Difference Calculator
Compares two values relative to their average.
- Average (Mean) Calculator
Finds the arithmetic mean of a list.
- Median Calculator
Finds the middle value of a list.
- Mode Calculator
Finds the most frequent value(s).
- Range Calculator
Finds the spread between the largest and smallest value.
- Standard Deviation Calculator
Measures how spread out a list of numbers is.
- Weighted Average Calculator
Calculates averages where items count differently, like weighted exam components.
- GCD (HCF) Calculator
Finds the highest common factor.
- LCM Calculator
Finds the lowest common multiple.
- Factorial Calculator
Calculates n factorial up to 170.
- Square Root Calculator
Finds the square root.
- Cube Root Calculator
Finds the cube root.
- Exponent Calculator
Raises a number to a power.
- Logarithm Calculator
Calculates logarithms in any base.
- Quadratic Equation Solver
Solves ax² + bx + c = 0.
- Pythagorean Theorem Calculator
Finds the hypotenuse of a right triangle.
- Fraction Simplifier
Reduces a fraction to its lowest terms.
- Ratio Simplifier
Simplifies a ratio.
- Decimal to Fraction Converter
Converts a decimal to a fraction.
- Scientific Notation Converter
Writes a number in scientific notation.
- Rounding Calculator
Rounds a number to the decimal places you choose.
- Prime Number Checker
Checks whether a number is prime.
- Number to Words Converter
Writes numbers in English words, handy for cheques.
- Roman Numeral Converter
Converts numbers to Roman numerals.
- Decimal to Binary Converter
Converts a base-10 number to binary, octal and hex.
- Binary to Decimal Converter
Converts binary to decimal.
- Hex to Decimal Converter
Converts hexadecimal to decimal.
- Area of a Circle Calculator
Calculates the area of a circle from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Area of a Rectangle Calculator
Calculates the area of a rectangle from the measurements you enter. Use any unit, as long as all inputs use the same one…
- Area of a Square Calculator
Calculates the area of a square from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Area of a Triangle Calculator
Calculates the area of a triangle from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Triangle Area from Three Sides (Heron's Formula)
Calculates the triangle area from three sides (heron's formula) from the measurements you enter. Use any unit, as long a…
- Area of a Trapezium Calculator
Calculates the area of a trapezium from the measurements you enter. Use any unit, as long as all inputs use the same one…
- Area of a Parallelogram Calculator
Calculates the area of a parallelogram from the measurements you enter. Use any unit, as long as all inputs use the same…
- Area of an Ellipse Calculator
Calculates the area of an ellipse from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Area of a Rhombus Calculator
Calculates the area of a rhombus from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Area of a Sector Calculator
Calculates the area of a sector from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Circumference of a Circle Calculator
Calculates the circumference of a circle from the measurements you enter. Use any unit, as long as all inputs use the sa…
- Perimeter of a Rectangle Calculator
Calculates the perimeter of a rectangle from the measurements you enter. Use any unit, as long as all inputs use the sam…
- Perimeter of a Square Calculator
Calculates the perimeter of a square from the measurements you enter. Use any unit, as long as all inputs use the same o…
- Perimeter of a Triangle Calculator
Calculates the perimeter of a triangle from the measurements you enter. Use any unit, as long as all inputs use the same…
- Perimeter of an Ellipse Calculator
Calculates the perimeter of an ellipse from the measurements you enter. Use any unit, as long as all inputs use the same…
- Arc Length Calculator
Calculates the arc length from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Volume of a Cube Calculator
Calculates the volume of a cube from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Volume of a Cuboid Calculator
Calculates the volume of a cuboid from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Volume of a Sphere Calculator
Calculates the volume of a sphere from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Volume of a Cylinder Calculator
Calculates the volume of a cylinder from the measurements you enter. Use any unit, as long as all inputs use the same on…
- Volume of a Cone Calculator
Calculates the volume of a cone from the measurements you enter. Use any unit, as long as all inputs use the same one.
- Volume of a Square Pyramid Calculator
Calculates the volume of a square pyramid from the measurements you enter. Use any unit, as long as all inputs use the s…
- Volume of a Hemisphere Calculator
Calculates the volume of a hemisphere from the measurements you enter. Use any unit, as long as all inputs use the same …
- Surface Area of a Cube Calculator
Calculates the surface area of a cube from the measurements you enter. Use any unit, as long as all inputs use the same …
- Surface Area of a Cuboid Calculator
Calculates the surface area of a cuboid from the measurements you enter. Use any unit, as long as all inputs use the sam…
- Surface Area of a Sphere Calculator
Calculates the surface area of a sphere from the measurements you enter. Use any unit, as long as all inputs use the sam…
- Surface Area of a Cylinder Calculator
Calculates the surface area of a cylinder from the measurements you enter. Use any unit, as long as all inputs use the s…
- Surface Area of a Cone Calculator
Calculates the surface area of a cone from the measurements you enter. Use any unit, as long as all inputs use the same …
- Surface Area of a Hemisphere Calculator
Calculates the surface area of a hemisphere from the measurements you enter. Use any unit, as long as all inputs use the…