Maths calculators 88 tools
Scientific calculator, percentages, fractions, equations, statistics and geometry.
Basic maths 32
- Speed distance timeFind speed, distance or time
- Work rate calculatorTime when A and B work together
- Compound interestInterest on interest, any compounding
- Simple interestSI for years, months or days
- Rule of 72How fast your money doubles
- Scientific calculatorsin, cos, log, powers and memory
- Basic calculatorBig keys, %, memory and history
- Percentage calculatorX% of Y, what %, change and more
- Percentage change% change between two values
- Percentage increaseHow much something went up, in %
- Percentage decreaseHow much something dropped, in %
- Fraction calculatorFraction sums with simplest form
- Mixed number calculatorMixed fractions: calculate and convert
- Ratio calculatorSimplify, solve and divide in a ratio
- Proportion calculatorDirect and inverse proportion
- Average calculatorMean, median, mode and range of a list
- Rounding calculatorRound to decimals, sig figs or 100s
- Exponent calculatorAny number to any power, exactly
- Square root calculator√ with simplest surd form
- Cube root calculator∛ of any number, with steps
- Log calculatorlog, ln and any base, plus antilog
- Scientific notationConvert to and from standard form
- Absolute value|x| and the distance between numbers
- BODMAS calculatorSolve step by step in BODMAS order
- Random number generatorRandom numbers, with or without repeats
- Factorial calculatorExact n!, digits and trailing zeros
- Prime number checkerIs it prime? Factors and next prime
- Factors calculatorAll factors, pairs, count and sum
- HCF and LCM calculatorHCF and LCM of 2 or more numbers
- Prime factorizationPrime factors with division steps
- Divisibility calculatorDivisibility rules from 2 to 12
- Modulo calculatora mod b with quotient and steps
Algebra & trigonometry 17
- Linear equation solverSolve ax + b = c with working
- Quadratic equation solverReal and complex roots with steps
- Cubic equation solverAll roots of ax³ + bx² + cx + d = 0
- Simultaneous equationsSolve 2 or 3 equations together
- Completing the squareTurn ax² + bx + c into vertex form
- Polynomial rootsAll roots of a polynomial up to x⁶
- Complex numbersAdd, multiply, divide; modulus and polar
- Matrix calculatorInverse, determinant, multiply and more
- Determinant calculatorDeterminant of 2×2, 3×3, 4×4 with steps
- Eigenvalue calculatorEigenvalues and eigenvectors, 2×2 & 3×3
- Linear inequality solverSolve ax + b < c on a number line
- Trigonometry calculatorsin, cos, tan and more, exact values
- Inverse trig calculatorarcsin, arccos, arctan and more
- Law of sinesSolve a triangle with a/sin A = b/sin B
- Law of cosinesFind the third side or all three angles
- Radians ↔ degreesRadians to degrees and back, with π
- Right triangle calculatorAny two values give every side and angle
Statistics & probability 13
- Permutation (nPr)nPr: arrangements where order matters
- Combination (nCr)nCr: choices where order doesn’t count
- Probability calculatorP(A), A and B, A or B, not A
- Binomial probabilityExactly, at most, at least k successes
- Standard deviationSample or population SD, with working
- Variance calculatorSample or population variance, worked
- Z-score calculatorz-score, percentile and normal areas
- Normal distributionP(X < x), between two values, percentile
- Confidence intervalCI for a mean using t or z
- Correlation calculatorPearson r from paired data, with p-value
- Linear regressionLine of best fit, r² and predictions
- Quartile & IQRQ1, median, Q3, IQR and outliers
- Sample size calculatorHow many people to survey
Geometry & shapes 26
- Area calculatorSquare, circle, triangle and 6 more
- Perimeter calculatorBoundary length of 9 shapes
- Volume calculatorCube, cylinder, cone, sphere and more
- Surface area calculatorCSA and TSA with steps
- Circle calculatorAny one value gives all four
- Triangle calculatorSides, angles, area and type
- Pythagoras calculatorFind the hypotenuse or a missing side
- Rectangle calculatorArea, perimeter and diagonal
- Square calculatorAny one value gives the rest
- Trapezoid calculatorTrapezium area, median and perimeter
- Polygon calculatorAngles, area and apothem for n sides
- Ellipse calculatorArea, perimeter and eccentricity
- Cylinder calculatorVolume, CSA, TSA and litres
- Cone calculatorSlant height, volume and surface area
- Sphere calculatorVolume, surface area and hemisphere
- Cuboid calculatorVolume, TSA, LSA and diagonal
- Pyramid calculatorSquare-base volume and surface area
- Prism calculatorTriangular prism volume and area
- Arc length calculatorArc, chord and sector from r and θ
- Sector area calculatorSector and segment area of a circle
- Angle calculatorComplement, supplement, clock angle
- Distance between pointsDistance formula in 2D and 3D
- Midpoint calculatorMidpoint or the missing endpoint
- Slope calculatorSlope, angle and y = mx + c
- Section formulaDivide a line in ratio m : n
- Triangle area (coords)Area from three vertices