Maths
Calculators that show where the answer comes from: the formula, each step, and exact fractions instead of rounding.
12 tools
- Scientific calculatorTrigonometry, logarithms, powers, factorials and a calculation history.
- Percentage calculatorX% of Y, percentage change, increases, discounts and reverse percentages.
- Equation solverLinear, quadratic and cubic equations and linear systems, step by step.
- Fraction calculatorFractions and mixed numbers with step-by-step working. Converts decimals, including repeating ones, to fractions.
- Statistics calculatorMean, median, mode, standard deviation, quartiles, histogram and box plot from pasted data.
- Matrix calculatorDeterminant, inverse, rank, matrix multiplication, Gauss–Jordan elimination and linear systems, with exact fractions.
- Physics and engineering formulasOver 30 formulas from mechanics, electricity, heat, fluids and optics. Leave empty the box you want to work out.
- GCD, LCM and prime factorisationGreatest common divisor, least common multiple, prime factorisation, divisors and primality checks.
- Combinations and probabilityFactorials, permutations and combinations (exact), the binomial distribution and the normal distribution, with charts.
- Arithmetic and geometric sequencesThe nth term and sum of arithmetic and geometric sequences, infinite sums, and the difference or ratio from two terms.
- Area, perimeter and volume of shapesArea and perimeter of flat shapes, volume and surface area of solids: circle, trapezoid, polygon, cylinder, cone, sphere and more.
- Triangle calculatorSolves a triangle from any three values (sides and angles): area, perimeter, heights, medians, circle radii and a drawing.
Who is it for?
For pupils and students who want to check their work and understand the solution, and for anyone who just needs a determinant, an average or the side of a triangle quickly. Every calculation runs in your browser.