Free Math Calculators – Page 2

100+ free calculators and solvers with step-by-step working and graphs. Every answer is checked. Free to use. No sign-up needed.

Fractions, Decimals & Percentages

.5→½ Decimal to Fraction CalculatorConvert any decimal to a fraction in simplest form, including repeating decimals like 0.333…. ½→.5 Fraction to Decimal CalculatorConvert fractions and mixed numbers to decimals, with repeating digits marked by a bar. a:b Ratio CalculatorSimplify ratios like 12:18 or 1.5:2.5, and share an amount in a given ratio. x̄ Average CalculatorFind the average (mean) of a list of numbers, or a weighted average with your own weights. %⇄ Percent, Fraction & Decimal ConverterConvert between percentages, fractions and decimals in one step, with the fraction in simplest form and repeating decimals shown. a/b Proportion CalculatorSolve proportions a/b = c/x for the missing value with cross-multiplication. −% Discount CalculatorFind the sale price after a percentage discount, including a second extra discount, and how much you save. VAT Sales Tax & VAT CalculatorAdd sales tax or VAT to a price, or remove it to find the price before tax. ±% Percent Error CalculatorFind the percent error between a measured or estimated value and the true value, with the absolute error and whether it is too high or low.

Algebra

x= Linear Equation SolverSolve linear equations of the form ax + b = cx + d, including fractions, with every balancing step shown and the answer checked by substitution. x² Quadratic Equation SolverSolve ax² + bx + c = 0 with the quadratic formula. Graph {x,y} Simultaneous Equations SolverSolve systems of 2 or 3 linear equations by elimination with exact fractions. Graph x³ Cubic Equation SolverSolve cubic equations: exact roots via the rational root theorem and factor theorem, complex roots, or accurate decimals. Graph [A] Matrix CalculatorFind the inverse, determinant, transpose or RREF of a matrix, or add and multiply matrices. |A| Determinant CalculatorFind the determinant of a square matrix with cofactor expansion steps, checked by row reduction. Graph +d Arithmetic Sequence CalculatorFind the nth term and the sum of an arithmetic sequence from the first term and common difference. Graph ×r Geometric Sequence CalculatorFind the nth term, the sum of n terms and the sum to infinity of a geometric sequence. Graph a+bi Complex Number CalculatorAdd, subtract, multiply and divide complex numbers exactly, and find the modulus, argument and polar form. Graph a⃗ Vector CalculatorFind the dot product, cross product, magnitudes, sum and angle between two 2D or 3D vectors, with steps and a vector diagram. Graph x< Inequality SolverSolve linear inequalities like 3x − 4 < x + 6 step by step, with interval notation and an animated number line. Graph