Math and Number Tools
From percentages and averages to primes, roots and geometry, solve everyday and advanced maths in a click with tools that always show their working.
66 tools in this category
Basic Calculator
Add, subtract, multiply and divide.
Scientific Calculator
Handle trig, logs and powers.
Percentage Calculator
Find X percent of Y and more.
Fraction Calculator
Add and subtract fractions.
Fraction to Decimal
Convert a fraction to a decimal.
Decimal to Fraction
Convert a decimal to a fraction.
Ratio Calculator
Simplify and solve ratios.
Proportion Solver
Solve a proportion for x.
Average (Mean) Calculator
Find the mean of a set of numbers.
Median Calculator
Find the middle value of a set.
Mode Calculator
Find the most frequent value.
Standard Deviation Calculator
Find the spread of your data.
Variance Calculator
Find the variance of your data.
GCD Calculator
Find the greatest common divisor.
LCM Calculator
Find the least common multiple.
Prime Number Checker
Check whether a number is prime.
Prime Factorization
Break a number into prime factors.
Factorial Calculator
Find the factorial of a number.
Power Calculator
Raise a base to an exponent.
Square Root Calculator
Find the square root of a number.
Cube Root Calculator
Find the cube root of a number.
Nth Root Calculator
Find any root of a number.
Logarithm Calculator
Find the log to any base.
Quadratic Equation Solver
Solve ax squared plus bx plus c.
Linear Equation Solver
Solve a linear equation for x.
Simultaneous Equations
Solve two equations in two variables.
Percentage Increase
Find a percentage increase.
Percentage Decrease
Find a percentage decrease.
Percentage Change
Find the change between two values.
Percentage Difference
Find the difference as a percentage.
Rounding Calculator
Round to a chosen number of decimals.
Significant Figures
Count the significant figures.
Scientific Notation Converter
Convert to and from scientific notation.
Number to Words
Spell a number out in words.
Words to Number
Convert words back into digits.
Roman Numeral Converter
Convert Arabic numbers to Roman.
Roman to Number
Convert Roman numerals to Arabic.
Binary Calculator
Do arithmetic in binary.
Hex Calculator
Do arithmetic in hexadecimal.
Octal Calculator
Do arithmetic in octal.
Base Converter
Convert between number bases.
Modulo Calculator
Find the remainder of a division.
Absolute Value
Find the magnitude of a number.
Triangle Area Calculator
Find area from base and height.
Circle Area Calculator
Find the area of a circle.
Rectangle Area
Find length times width.
Trapezoid Area
Find the area of a trapezoid.
Sphere Volume
Find the volume of a sphere.
Cylinder Volume
Find the volume of a cylinder.
Cone Volume
Find the volume of a cone.
Pythagorean Theorem
Find the hypotenuse of a triangle.
Distance Between Points
Find the distance between two points.
Slope Calculator
Find the slope of a line.
Midpoint Calculator
Find the midpoint of a segment.
Circumference Calculator
Find the circumference of a circle.
Perimeter Calculator
Find the perimeter of a shape.
Combinations (nCr)
Count combinations of items.
Permutations (nPr)
Count ordered arrangements.
Probability Calculator
Find the probability of an event.
Odds Calculator
Convert probability into odds.
Number Sequence Generator
List an arithmetic or geometric sequence.
Fibonacci Generator
Generate the Fibonacci sequence.
Multiplication Table
Show any number's times table.
Factor Finder
List all factors of a number.
Even/Odd Checker
Classify a number as even or odd.
Rounding to Nearest
Round to the nearest 10, 100 or 1000.