Arithmetic & Percentage Calculators
Percentage, ratio and number calculators. Find a percent of a number or a percent change, simplify a ratio or solve a proportion, and find the greatest common factor or least common multiple of several numbers. Every result is shown step by step, so you can check the working.
Last updated October 20, 2026
All Arithmetic & Percentages tools
Math & Statistics · Arithmetic & Percentages
Percentage CalculatorPercent of a number, percent change and percent increase or decrease
Math & Statistics · Arithmetic & Percentages
Ratio CalculatorSimplify a ratio or solve a proportion for the missing number
Math & Statistics · Arithmetic & Percentages
LCM CalculatorLeast common multiple of 2 to 10 numbers, with prime factors
Math & Statistics · Arithmetic & Percentages
GCF CalculatorGreatest common factor of 2 to 10 numbers, with prime factors
Math & Statistics · Arithmetic & Percentages
Square Root CalculatorSquare or cube root with radical form and nearest perfect squares
Math & Statistics · Arithmetic & Percentages
Factor CalculatorAll factors, factor pairs and prime factorization of a whole number
Math & Statistics · Arithmetic & Percentages
Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers, simplified
Math & Statistics · Arithmetic & Percentages
Exponent CalculatorRaise any base to any power, with scientific notation and negative exponents
Math & Statistics · Arithmetic & Percentages
Log CalculatorLogarithm of any base, plus ln, log10 and log2 with an antilog check
Math & Statistics · Arithmetic & Percentages
Binary ConverterConvert whole numbers between binary, octal, decimal, hexadecimal and any base to 36
Math & Statistics · Arithmetic & Percentages
Roman Numerals ConverterConvert numbers 1 to 3999 to Roman numerals and back, with strict validation and steps
Math & Statistics · Arithmetic & Percentages
Hex ConverterConvert hexadecimal to decimal, binary and octal and back, with the steps shown
Math & Statistics · Arithmetic & Percentages
Prime Factorization CalculatorPrime factors with division steps, exponent form and prime check
Related tools
Math & Statistics · Geometry
Slope CalculatorSlope, line equation, angle and distance from two points
Math & Statistics · Geometry
Volume CalculatorVolume of a cube, box, cylinder, cone, sphere or pyramid
Math & Statistics · Statistics & Probability
Average CalculatorMean, median, mode, sum and range of a list of numbers
Math & Statistics · Statistics & Probability
Standard Deviation CalculatorStandard deviation and variance of a sample or a population
Math & Statistics · Algebra
Quadratic Formula CalculatorSolve ax² + bx + c = 0: real or complex roots, discriminant and vertex