Percentage Calculator
Solve all three classic percentage questions; percent of a number, percent-of-total, and percentage change; in one switchable tool.
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Percentage Change Calculator
Compute the signed percentage increase or decrease between two values, with the absolute difference and multiplier shown alongside.
Open calculatorDecimal to Fraction Calculator
Convert any decimal into its simplest fraction using continued fractions, with mixed-number output and honest notes when only an approximation exists.
Open calculatorRatio Calculator
Simplify any two-term ratio to lowest terms or solve the missing fourth term of a proportion a:b = c:d.
Open calculatorQuadratic Equation Calculator
Solve ax² + bx + c = 0 for real or complex roots, showing the discriminant and vertex so the answer never arrives unexplained.
Open calculatorGCD & LCM Calculator
Find the greatest common divisor of two integers with Euclid’s algorithm, plus the least common multiple derived from it.
Open calculatorFactorial Calculator
Compute n! for any whole number from 0 to 170, with digit counts and scientific magnitude shown for the huge results.
Open calculatorRandom Number Generator
Draw one to one hundred random integers within any range, optionally requiring unique picks, sorted for readability.
Open calculatorExponent & Root Calculator
Raise any base to any power; including fractional exponents for square and cube roots; with friendly handling of complex results.
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