Math Calculators

Percentage, fraction, ratio, and other everyday math calculators.

• Percentage CalculatorCalculate percentages, percentage change, and what percent one number is of another.
• Fraction CalculatorAdd, subtract, multiply, or divide fractions with automatic simplification.
• Scientific CalculatorA full scientific calculator for trigonometry, roots, logarithms, and arithmetic.
• Average CalculatorCalculate the mean, median, mode, and range of any list of numbers.
• Random Number GeneratorGenerate one or more random numbers within any range.
• Ratio CalculatorSimplify a ratio to its lowest terms, or solve for a missing value in a proportion.
• Triangle CalculatorSolve a triangle's angles, area, and perimeter from its sides.
• Standard Deviation CalculatorCalculate standard deviation, variance, and mean for a list of numbers.
• Rounding CalculatorRound a number to a decimal place or to the nearest multiple.
• Square Root CalculatorCalculate the square root or nth root of any number.
• LCM CalculatorCalculate the least common multiple of two or more numbers.
• LCD CalculatorCalculate the least common denominator of two or more fractions.
• GCF CalculatorCalculate the greatest common factor of two or more numbers.
• Roman Numeral ConverterConvert numbers to Roman numerals, or Roman numerals back to numbers.
• Fraction to Decimal to Percent ConverterConvert instantly between a fraction, decimal, and percentage.
• Binary CalculatorConvert numbers between binary, octal, decimal, and hexadecimal.
• Quadratic Formula CalculatorSolve any quadratic equation ax² + bx + c = 0, including complex roots.
• Correlation Coefficient CalculatorCalculate the Pearson correlation coefficient between two paired sets of numbers.
• Density CalculatorSolve for density, mass, or volume given the other two values.
• Sample Size CalculatorCalculate the minimum sample size needed for a survey at a target confidence level.