Math & Arithmetic Calculators

10 calculators

Percentage, fraction, average, LCM, HCF and other everyday math calculators.

• Percentage CalculatorPopularCalculate percentages, percentage increase and percentage decrease in one step, with a worked example for each case.
• Average CalculatorFind the mean of up to five numbers, with the sum and the count of the values that were actually used.
• Factor CalculatorList every factor of a whole number, count them and see the prime factorisation written out with powers.
• Fraction CalculatorAdd, subtract, multiply or divide two fractions and get the answer simplified, plus its decimal and percentage forms.
• HCF CalculatorFind the highest common factor of two numbers, shown with every division performed by Euclid's algorithm.
• LCM CalculatorFind the least common multiple of two whole numbers, with their GCD and the identity that links the two.
• Percentage Increase CalculatorApply any percentage — an increase or a decrease — to a number and get the change, the new value and the reverse rate.
• Prime Number CalculatorCheck whether a number is prime, see its smallest prime factor and find the next prime that follows it.
• Ratio CalculatorSimplify two quantities into a ratio, see the first as a share of the total and find what one part is worth.
• Weighted Average CalculatorCombine three values with three weights to get the weighted average, the plain average and the weight total.