32 calculators
Mathematics
BODMAS, scientific, statistics, fractions and ratios.
Basics7
- BODMAS CalculatorSolve any expression in BODMAS order, with every step shown.Open calculator
- Percentage CalculatorX% of Y, percentage change, what-percent-is-X-of-Y, percent error and percent difference.Open calculator
- Fraction CalculatorAdd, subtract, multiply, divide, and simplify fractions.Open calculator
- Ratio CalculatorSimplify a ratio, or solve a proportion for a missing value.Open calculator
- Rounding Calculator — Decimal Places, Significant Figures & Nearest MultipleRound exactly to decimal places, significant figures or the nearest 10, 100, 0.05… with half-up, banker's, ceiling, floor or truncate.Open calculator
- Scientific Notation Converter — Standard Form, E-notation & EngineeringConvert numbers to and from scientific notation (a × 10ⁿ), E-notation and engineering notation with SI prefixes — exactly.Open calculator
- Long Division Calculator — Steps, Remainder & Repeating DecimalsLong division worked step by step, with the quotient and remainder and the exact decimal — repeating digits marked.Open calculator
Scientific1
Statistics7
- Statistics CalculatorMean, median, mode, standard deviation and variance for a data set — or a weighted average.Open calculator
- Probability Calculator — Two Events, Binomial & At Least OnceProbability of A and B, A or B, neither and conditional; binomial 'exactly k of n'; and the chance of at least one success in n tries.Open calculator
- Z-Score & Normal Distribution Calculator — Percentile and ProbabilityZ-score of a value, its percentile and the area below, above or between values on a normal curve — or the value at a percentile.Open calculator
- Confidence Interval Calculator — Mean or Proportion, Margin of ErrorConfidence interval and margin of error for a mean (t or z) or a proportion (Wilson and normal), at 80–99.9 % confidence.Open calculator
- Sample Size Calculator — Surveys and StudiesHow many people to survey (or measure) for a chosen margin of error and confidence — with a finite-population correction.Open calculator
- P-Value Calculator — From z, t or Chi-squareThe p-value for a z-score, t-statistic or chi-square statistic — one- or two-tailed — and whether it's significant at your α.Open calculator
- Random Number Generator & Dice RollerFair random numbers in a range (with or without repeats), dice like 2d6+3, coin flips, and random picks or shuffles from a list.Open calculator
Geometry6
- Area Calculator — Any ShapeArea and perimeter of squares, triangles, circles, sectors, ellipses, polygons and more — with the formula.Open calculator
- Volume Calculator — Any SolidVolume and surface area of cubes, cylinders, cones, spheres, pyramids, tanks and pipes — in litres too.Open calculator
- Ready-madeSurface Area Calculator — Cube, Cylinder, Cone, Sphere & MoreTotal surface area of cubes, cuboids, cylinders, cones, spheres, pyramids and more — with the formula worked through.Open calculator
- Circle Calculator — Radius, Diameter, Circumference, Area, Arc & SectorKnow one of radius, diameter, circumference or area? Get all the others — plus arc length, sector, chord and segment for an angle.Open calculator
- Triangle Calculator — Solve Any Triangle (SSS, SAS, ASA, AAS, SSA)Solve a triangle from three known parts: all sides and angles, area, perimeter, heights, in- and circumradius — both answers for the ambiguous SSA case.Open calculator
- Ready-madeRight Triangle & Pythagoras CalculatorSolve a right-angled triangle from two parts — legs, hypotenuse or an angle — with Pythagoras' theorem shown.Open calculator
Algebra5
- Quadratic Equation SolverSolve ax² + bx + c = 0 — real or complex roots, vertex, factored form and graph, step by step.Open calculator
- Slope, Distance & Midpoint Calculator — Line Through Two PointsFrom two points: slope, distance, midpoint, angle and the line's equation in slope-intercept and standard form.Open calculator
- Exponent, Root & Logarithm CalculatorPowers (aᵇ), n-th roots, logarithms in any base, and solving aˣ = y — with the working and big answers in scientific notation.Open calculator
- Number Sequence Calculator — Arithmetic, Geometric & FibonacciThe n-th term and the sum of arithmetic, geometric and Fibonacci-type sequences — or find the pattern from a few terms.Open calculator
- Matrix Calculator — Multiply, Determinant, Inverse, TransposeAdd, subtract and multiply matrices, or find a matrix's determinant, inverse, transpose, rank and powers — up to 8 × 8.Open calculator
Numbers1
Probability1
Number Theory1
Also useful here3
- Binary & Hex Calculator — Arithmetic, Bitwise AND/OR/XOR & ShiftsAdd, subtract, multiply and divide binary, octal, hex or decimal numbers, plus AND, OR, XOR, NOT and bit shifts — with two's complement.Open calculator
- Roman Numeral Converter — Numbers ⇄ Roman NumeralsConvert numbers to Roman numerals and back — 1 to 3,999, and up to 3,999,999 with the bar (vinculum) for thousands.Open calculator
- Angle ConverterConvert angles between degrees, radians, gradians, arcminutes, arcseconds, turns and mils.Open calculator