Mathematics Calculators

Open a focused calculator and review its formula, variables, worked example and important limits.

Available tools

  • Ratio & Proportion Calculator — Find the missing value in a proportion a/b = c/d using cross multiplication.
  • Descriptive Statistics Calculator — Find the mean, median, mode, range and standard deviation of a data set.
  • Linear Equation Calculator — Solve linear equations of the form ax + b = c and see each algebra step, from moving the constant to dividing by the coefficient.
  • Fraction Calculator — Add, subtract, multiply or divide proper, improper and mixed-number fractions with the working shown.
  • Percentage Calculator — Find what percentage one number is of another, with the formula (part ÷ whole) × 100 and a worked example you can check by hand.
  • Arithmetic Mean Calculator — Calculate the arithmetic mean (average) of a list of numbers: enter your values and get the count and the mean instantly, with a worked example.
  • Quadratic Roots Calculator — Solve ax² + bx + c = 0 with the quadratic formula: see the discriminant and both real roots, or learn when the roots are complex.

A focused mathematics collection

These pages solve defined tasks rather than acting as a general-purpose symbolic solver. That keeps units, assumptions and the intended method visible.