All Calculators
76 free calculators across 12 categories — every tool runs instantly in your browser.
Algebra(2)
Basic Math(7)
- Basic CalculatorSimple arithmetic with two operands
- Ratio CalculatorCompute the ratio of two numbers as a decimal
- Proportion CalculatorSolve a simple proportion a:b = c:x for x
- Square Root CalculatorFind the square root of a number
- Cube Root CalculatorFind the cube root of a number
- Modulo CalculatorFind the remainder of division
- Exponent CalculatorRaise a base to a power
Conversion(8)
- Length ConverterConvert between km, m, cm, mm, miles, yards, feet and inches
- Weight ConverterConvert between kg, g, pounds and ounces
- Temperature ConverterConvert between Celsius, Fahrenheit and Kelvin
- Speed ConverterConvert between km/h, m/s, mph and knots
- Area ConverterConvert between m², km², hectares and acres
- Data Size ConverterConvert between B, KB, MB and GB
- Time ConverterConvert between seconds, minutes, hours, days and more
- Number Base ConverterConvert between binary, octal, decimal and hexadecimal
Finance(5)
Fractions & Decimals(4)
Geometry(16)
- Area CalculatorArea of a square (side × side)
- Square Area CalculatorArea of a square
- Square Perimeter CalculatorPerimeter of a square
- Rectangle Area CalculatorArea of a rectangle
- Rectangle Perimeter CalculatorPerimeter of a rectangle
- Triangle Area CalculatorArea of a triangle from base and height
- Circle Area CalculatorArea of a circle
- Circumference CalculatorCircumference of a circle
- Trapezoid Area CalculatorArea of a trapezoid
- Parallelogram Area CalculatorArea of a parallelogram
- Pythagorean Theorem CalculatorHypotenuse of a right triangle
- Volume of a Box CalculatorRectangular box volume
- Cube Volume CalculatorVolume of a cube
- Sphere Volume CalculatorVolume of a sphere
- Cylinder Volume CalculatorVolume of a cylinder
- Cone Volume CalculatorVolume of a cone
Number Theory(6)
- GCF CalculatorGreatest common factor of two integers
- LCM CalculatorLeast common multiple of two integers
- Prime Number CheckerCheck whether an integer is prime
- Prime Factorization CalculatorBreak an integer into its prime factors
- Factorial CalculatorCompute n! for non-negative integers
- Fibonacci CalculatorFind the nth Fibonacci number
Percentages(5)
- Percentage CalculatorCalculate percentage of a value
- Percentage Increase CalculatorIncrease a value by a percentage
- Percentage Decrease CalculatorDecrease a value by a percentage
- Percentage Change CalculatorPercentage change between two values
- Reverse Percentage CalculatorFind the whole from a part and its percentage
Scientific(5)
Statistics(9)
- Average CalculatorCompute the arithmetic mean of a list of numbers
- Median CalculatorFind the middle value of a data set
- Mode CalculatorFind the most frequent value in a data set
- Variance CalculatorPopulation variance of a data set
- Standard Deviation CalculatorPopulation standard deviation of a data set
- Sum CalculatorAdd up a list of numbers
- Mean CalculatorArithmetic mean of a data set
- Permutation CalculatornPr — arrangements where order matters
- Combination CalculatornCr — selections where order does not matter