Math Calculators
Percentages, fractions & powers
Percentage Calculator
Calculate X% of Y, find what percent one number is of another, and solve percentage increase problems in one place.
Percentage Increase Calculator
Find the percentage increase between an original value and a new value, including the absolute change.
Percentage Decrease Calculator
Work out how much a value dropped in percent terms, with the absolute reduction shown alongside.
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, with results automatically simplified.
Decimal to Fraction Calculator
Convert any decimal into the nearest simple fraction, including repeating decimals like 0.333.
Fraction to Decimal Calculator
Convert fractions and mixed numbers into decimal form with up to six decimal places.
Ratio Calculator
Simplify ratios, compare two quantities and scale recipes or mixes while keeping proportions intact.
Proportion Calculator
Solve A:B = C:D for the missing value using cross multiplication.
Exponent Calculator
Raise any base to any power, including negative and fractional exponents.
Square Root Calculator
Find √ of any non-negative number, plus perfect-square detection and nearby roots.
Cube Root Calculator
Compute ∛ for positive and negative numbers — cube roots of negatives are valid real numbers.
Scientific Calculator
Full expression calculator with parentheses, powers, roots, trigonometry, logarithms and constants π and e.
Random Number Generator
Generate random integers or decimals in any range, with optional unique values for draws and raffles.
Prime Number Checker
Test whether a number is prime and see its smallest factors when it isn't.
GCF Calculator
Greatest common factor (HCF/GCD) of two integers via the Euclidean algorithm.
LCM Calculator
Least common multiple of two integers — handy for adding fractions and syncing repeating events.
Factorial Calculator
Compute n! for large n with exact big-integer arithmetic — no rounding errors.
About math calculations
Math calculators for percentages, fractions, ratios, roots, exponents and prime numbers — with worked examples and formulas so you can verify every step.