Percentage calculator
Find a percentage of a number, or calculate what percentage one value represents.
CalculatorsKITFORMA / ALPHA
Calculators
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Calculators
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Percentage change
Calculate the increase or decrease between an original and a new value.
CalculatorsAverage calculator
Find the arithmetic mean, count and sum of a list of numbers.
CalculatorsMedian calculator
Find the middle value, sorted list and mode of your data.
CalculatorsStandard deviation
Compare sample and population standard deviation, variance and mean.
CalculatorsRatio calculator
Simplify two integers into their smallest equivalent ratio.
CalculatorsFraction calculator
Add, subtract, multiply or divide two fractions and simplify the result.
CalculatorsScientific calculator
Evaluate arithmetic with parentheses, powers, square roots and trigonometric functions.
CalculatorsRandom number generator
Generate cryptographically sourced random integers within a chosen inclusive range.
CalculatorsDice roller
Roll virtual dice with your choice of sides and see the total.
CalculatorsCoin flip
Flip one or more virtual coins and count heads and tails.
CalculatorsPrime number checker
Check whether an integer is prime and find a divisor when it is composite.
CalculatorsPrime factorization
Express a positive integer as a product of prime factors.
CalculatorsGCD and LCM
Find the greatest common divisor and least common multiple of two integers.
CalculatorsQuadratic equation solver
Solve ax² + bx + c = 0 and inspect the discriminant.
CalculatorsTriangle calculator
Calculate a triangle’s area and perimeter from three side lengths.
CalculatorsCircle calculator
Calculate diameter, circumference and area from a radius.
CalculatorsRectangle calculator
Find a rectangle’s area, perimeter and diagonal.
CalculatorsCompound interest calculator
Estimate growth from a starting amount, annual rate and compounding frequency.
CalculatorsLoan payment calculator
Estimate a fixed-rate amortizing loan’s monthly payment and total interest.
CalculatorsDiscount calculator
Find the final price and amount saved from a percentage discount.
CalculatorsTip and split calculator
Calculate a tip, the total bill and each person’s share.
CalculatorsTax / VAT calculator
Add a tax rate to a net amount or extract it from a tax-inclusive total.
CalculatorsBreak-even calculator
Estimate the number of units needed to cover fixed and variable costs.
CalculatorsA little break?
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