All tools
Every tool on CalcWorld, grouped by category.
Arithmetic
- Absolute Value CalculatorThe absolute value |x| of any number.
- Complex Fraction CalculatorSimplify a fraction whose top or bottom is itself a fraction.
- Decimal to Fraction CalculatorA decimal as a fraction in lowest terms, including repeating decimals, step by step.
- Expanded Form CalculatorA number written as the sum of its place values.
- Factor CalculatorEvery factor of a whole number, its factor pairs and its prime factorization.
- Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers, step by step.
- Fraction to Decimal CalculatorA fraction or mixed number as a decimal, with the division steps and repeating digits marked.
- GCF CalculatorGreatest common factor of two or more whole numbers.
- Long Division CalculatorLong division written out digit by digit, with the remainder and the decimal answer.
- Modulus CalculatorThe remainder a mod n, with negative numbers handled the mathematical way.
- Percent Change CalculatorPercent increase or decrease from an old value to a new one, step by step.
- Percent Difference CalculatorPercent difference between two values, measured against their average, step by step.
- Percent Error CalculatorPercent error of a measurement against the accepted value, step by step.
- Percent to Decimal CalculatorPercent to decimal, and decimal back to percent.
- Percent to Fraction CalculatorA percent as a fraction in lowest terms, with the steps.
- Percentage CalculatorPercent of a number, what percent one number is of another, and percentage increase or decrease, step by step.
- Proportion CalculatorSolve a/b = c/d for the missing value by cross-multiplying.
- Scientific Notation ConverterDecimal to scientific notation (standard form) and back.
- Square Root CalculatorSquare roots, cube roots and nth roots, with simplified radicals.
- Sum CalculatorAdd up a list of numbers.
- Unit Rate CalculatorAmount per one unit: miles per hour, price per item and so on.
Algebra
- Average Rate of Change CalculatorAverage rate of change of f(x) between two x-values.
- Distance Between Two Points CalculatorDistance between two points with the distance formula.
- Dot Product CalculatorThe dot (scalar) product of two vectors.
- Exponent CalculatorPositive, zero, negative and fractional powers, with the rule used at each step.
- Fibonacci CalculatorThe nth Fibonacci number and the sequence up to it.
- Geometric Sequence CalculatorTerms, nth term and sum of a geometric sequence.
- Midpoint CalculatorThe point halfway between two points.
- Pi CalculatorApproximate π with four classic series.
- Quadratic Formula CalculatorSolve ax² + bx + c = 0: discriminant, real or complex roots, vertex and graph, step by step.
- Sigma Notation CalculatorEvaluate a Σ summation and see every term.
- Slope CalculatorSlope from two points, with rise, run and the equation of the line, step by step.
- Vector CalculatorVector addition, subtraction, dot and cross products, magnitude and angle.
- Vector Coordinate ConverterCartesian, cylindrical and spherical coordinates, converted both ways.
- Vector Cross Product CalculatorThe cross product A × B of two 3D vectors, step by step.
Geometry
- Arc Length CalculatorArc length from radius and central angle, or the other way round.
- Aspect Ratio CalculatorFind a matching width or height at the same aspect ratio.
- Circle Area CalculatorArea of a circle from its radius or diameter.
- Circle CalculatorRadius, diameter, circumference and area from any one of them.
- Circle Circumference CalculatorCircumference of a circle from its radius or diameter.
- Cone CalculatorVolume, slant height and surface area of a cone.
- Cylinder Surface Area CalculatorSurface area of a cylinder from its radius and height.
- Golden Ratio CalculatorLengths in the golden ratio (about 1.618 to 1).
- Polygon Area CalculatorArea of any polygon from the coordinates of its corners.
- Polygon CalculatorArea, perimeter and angles of a regular polygon.
- Radius CalculatorRadius of a circle from its diameter, circumference or area.
- Right Triangle CalculatorMissing sides and angles of a right triangle.
- Sphere CalculatorVolume and surface area of a sphere from any one measurement.
- Triangle Area CalculatorArea of a triangle from its base and height.
- Triangle CalculatorSolve a triangle from three known sides or angles.
- Volume CalculatorVolume of a box, cylinder, sphere, cone or pyramid.
Statistics
- All Possible Combinations GeneratorList every combination of a set of items.
- Factorial Calculatorn! for whole numbers from 0 to 170.
- Geometric Mean CalculatorGeometric mean of a list of positive numbers.
- Graph GeneratorPlot x, y data points as a line graph.
- Linear Regression CalculatorLine of best fit with the sums, slope, intercept, r and r² worked out, plus a scatter plot.
- Percentile CalculatorThe value at a percentile, or the percentile rank of a value, with three methods.
- Permutation and Combination CalculatornPr and nCr together, with or without repetition, step by step.
- Quartile CalculatorQ1, median, Q3 and the interquartile range, with a choice of three methods.
- Standard Deviation CalculatorSample or population standard deviation with the full table of working.
- Variance CalculatorSample or population variance with every squared difference shown.
Number systems
- Base ConverterConvert a number between any two bases, with the steps.
- Binary to Decimal ConverterBinary to decimal, with the place values explained.
- Binary to Hex ConverterBinary to hexadecimal and back.
- Binary to Octal ConverterBinary to octal and back, with the grouping steps.
- Decimal to Binary ConverterDecimal to binary with the division steps, including fractions.
- Decimal to Hexadecimal ConverterDecimal to hexadecimal (base 10 to base 16).
- Hex ConverterHexadecimal to and from decimal, binary and octal.
- Hex to Binary ConverterHexadecimal to binary and back.
- Hex to Decimal ConverterHexadecimal to decimal (base 16 to base 10).
Science
- Center of Mass CalculatorCenter of mass of a set of point masses.
- Centripetal Force CalculatorForce on an object moving in a circle: F = mv² ÷ r.
- Mass CalculatorAdd several masses and see the total in kg, g and lb.
- Speed Distance Time CalculatorFind speed, distance or time from the other two.
- Stoichiometry CalculatorMass-to-mass conversions from a balanced chemical equation.
- Wavelength CalculatorWavelength from frequency and wave speed.
Finance
- Depreciation CalculatorYear-by-year depreciation schedule for an asset.
- Financial CalculatorsLoan, investment and mortgage calculators on one page.
- Future Value Annuity CalculatorWhat a series of equal payments grows to with interest.
- Home Appreciation CalculatorProject a home's value forward at a steady yearly rate.
- Hourly to Salary ConverterHourly wage as yearly, monthly and weekly pay.
- Mortgage Repayment CalculatorMonthly mortgage payment with an amortization schedule.
- Percent Growth CalculatorGrowth between a starting and an ending value, in total and per period.
More tools
- Drunk CalculatorA joke calculator that gets sums wrong on purpose.
- Image Format ConverterConvert images between PNG, JPG, WebP and a block-based SVG.
- Infix to Postfix ConverterInfix expressions to postfix (reverse Polish) notation.
- Odds ConverterDecimal, fractional and American odds with implied probability.