Math Calculators
Math calculators with formulas, worked examples, and documented assumptions.
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9 toolsDiscount Calculator
Find sale price, savings, tax, and effective price reduction.
Open calculatorFraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the result.
Open calculatorGCD and LCM Calculator
Find the greatest common divisor and least common multiple of two whole numbers.
Open calculatorPercentage Calculator
Find a percentage, compare two numbers, or calculate a change.
Open calculatorPercentage Difference Calculator
Compare two nonnegative values using their average as the percentage base.
Open calculatorPermutation and Combination Calculator
Count ordered arrangements and unordered selections of distinct items without replacement.
Open calculatorQuadratic Equation Calculator
Solve real-coefficient quadratic equations, including complex roots and linear cases.
Open calculatorRatio Calculator
Simplify a two-part ratio and divide a total into proportional shares.
Open calculatorReverse Percentage Calculator
Find the original amount before a known percentage increase or decrease.
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