Math & Numbers
Percentages, averages, fractions, and more. {0} tools available.
Percentage
Percentage Calculator
Calculate any percentage quickly and accurately
Percentage Change Calculator
Calculate percentage change between two values
Percentage Decrease Calculator
Calculate percentage decrease between two values
Percentage Increase Calculator
Calculate percentage increase between two values
Basic Math
Factors & Multiples
Algebra
Geometry
Area Calculator
Calculate area of rectangles, triangles, circles, and more
Circle Calculator
Calculate radius, diameter, area, and circumference
Cone Calculator
Calculate cone volume, surface area, and dimensions
Cylinder Calculator
Calculate cylinder volume, surface area, and dimensions
Perimeter Calculator
Calculate perimeter of rectangles, triangles, circles, and more
Pythagorean Theorem Calculator
Solve right triangle sides with a² + b² = c²
Rectangular Prism Calculator
Calculate box volume, surface area, and diagonals
Sphere Calculator
Calculate sphere volume, surface area, and dimensions
Surface Area Calculator
Calculate surface area of 3D shapes
Triangle Calculator
Solve any triangle from sides and angles
Volume Calculator
Calculate volume of spheres, cylinders, cones, and more
Statistics
Combination Calculator
Calculate combinations where order doesn't matter
Confidence Interval Calculator
Calculate confidence intervals and sample size
Factorial Calculator
Calculate factorials and derangements exactly
Normal Distribution Calculator
Calculate normal distribution probabilities
Percentile Calculator
Find percentiles, ranks, and quartiles from data
Permutation Calculator
Calculate permutations where order matters
Probability Calculator
Calculate probabilities for events and trials
Standard Deviation Calculator
Calculate standard deviation and statistics from your data
Z-Score Calculator
Calculate z-scores and percentiles from your data
Number Systems
Base Converter
Convert numbers between any base from 2 to 36
Binary Calculator
Perform arithmetic on binary numbers
Binary to Decimal Converter
Convert binary numbers to decimal values
Decimal to Binary Converter
Convert decimal numbers to binary values
Decimal to Hex Converter
Convert decimal numbers to hexadecimal values
Hex to Decimal Converter
Convert hexadecimal numbers to decimal values
Octal Converter
Convert between octal and decimal number systems
Roman Numeral Converter
Convert between Roman numerals and decimal numbers