Math
Percentages, exact integers and everyday arithmetic.
Percentage calculator
Find a percentage of any number. Calculate discounts, portions and everyday percentages with precise decimal arithmetic.
Open toolPercentage change calculator
Find how much one number is bigger or smaller than another in percent. Use this calculator to compare two values or measure a percentage increase or decrease, with the original value as your reference.
Open toolFactorial calculator
Calculate exact factorials from 0 to 1,000, including integers much larger than ordinary floating-point numbers can represent.
Open toolBasic calculator
Add, subtract, multiply or divide two numbers. Decimal arithmetic keeps everyday calculations such as 0.1 + 0.2 precise.
Open toolFraction calculator
Add, subtract, multiply or divide two fractions and get an exact answer reduced to its simplest form.
Open toolGCD calculator
Find the greatest common divisor of two integers, including exact values beyond ordinary floating-point precision.
Open toolLCM calculator
Find the least common multiple of two integers using exact integer arithmetic. Negative inputs are handled by magnitude.
Open toolCombination calculator
Count the ways to choose r distinct items from n items when order does not matter and repetition is not allowed.
Open toolPermutation calculator
Count ordered selections of r distinct items from n items. Each item can appear only once in a selection.
Open toolProportion calculator
Solve a proportion of the form a/b = c/x. Find the missing fourth term from three nonzero numbers.
Open toolAverage calculator
Calculate the arithmetic mean, median, minimum and maximum of a list of numbers. Decimal values and negative numbers are supported.
Open toolWeighted average calculator
Find an average when values contribute different weights. Pair each value with its weight in the same list position.
Open toolWhat percent calculator
Find what percentage one number is of another. Compare a part with a nonzero whole using precise decimal arithmetic.
Open toolReverse percentage calculator
Recover an original value from a final value and a known percentage change. Enter a negative percentage for a decrease.
Open toolPower calculator
Raise a base to an exponent, including negative exponents and real-valued fractional powers where a real result exists.
Open toolLogarithm calculator
Find the logarithm of a positive value in any positive base other than one. Calculate common, binary and custom-base logarithms.
Open toolQuadratic Equation Calculator
What are the real solutions of ax squared plus bx plus c equals zero? Enter the values below to calculate the result.
Open toolGeometric Sequence Calculator
What is the nth term and finite sum of a geometric sequence? Enter the values below to calculate the result.
Open toolSquare Root Calculator
What nonnegative number squares to this value? Enter the values below to calculate the result.
Open toolCube Root Calculator
What real number cubes to this value? Enter the values below to calculate the result.
Open toolNth Root Calculator
What real number raised to the nth power gives this value? Enter the values below to calculate the result.
Open toolGolden Ratio Calculator
How do I divide a length into two parts in the golden ratio? Enter the values below to calculate the result.
Open toolOrder Of Magnitude Calculator
What power of ten is the scientific-notation exponent of this number? Enter the values below to calculate the result.
Open toolBandwidth Delay Product Calculator
Estimate data in flight from link throughput and round-trip latency.
Open toolPropagation Latency Calculator
Calculate one-way propagation delay using supplied path length and propagation speed.
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