Math
Calculators for algebra, calculus, trigonometry, and everyday math — step by step.
55 tools
Scientific Calculator
Full function with history.
Percentage Calculator
Percent of, increase, decrease, change.
Quadratic Solver
ax² + bx + c = 0, step by step.
Matrix Calculator
Add, subtract, multiply, determinant.
Trigonometry
sin, cos, tan + inverse functions.
Fraction Calculator
+ − × ÷ with simplification.
Derivative Calculator
Step by step, with the rules used.
Integral Calculator
Definite & indefinite, with steps.
System of Equations
2×2 and 3×3 linear systems.
Polynomial Roots
All real and complex roots.
Limit Calculator
Estimate a limit from both sides.
Logarithm Calculator
log, ln, log₂, and any base.
Factorial Calculator
n! exactly, with expansion.
Combinations & Permutations
nCr and nPr, exact.
Fraction ↔ Decimal ↔ %
Convert between all three forms.
Slope Calculator
Slope, intercept, and line equation from two points.
GCD & LCM
Greatest common divisor, least common multiple, and prime factors.
Significant Figures
Count significant figures and round to a given number.
Ratio Calculator
Simplify ratios and solve proportions.
Sequences
Arithmetic and geometric nth term and sum.
Vector Calculator
Add, subtract, dot/cross product, magnitude.
Complex Numbers
Add, multiply, modulus, and conjugate.
Exponent Calculator
Powers and the laws of exponents.
Simplify Radicals
Reduce a square root to simplest radical form.
Modulo Calculator
Remainder of a division (a mod n).
Percent Error
Compare a measured value to the true value.
Prime Number Checker
Test if a number is prime and factor it.
Rounding Calculator
Round to decimals, places, or significant figures.
Long Division Calculator
Divide two numbers with the full long-division working shown.
Synthetic Division Calculator
Divide a polynomial by (x − c) with the synthetic-division steps.
Completing the Square
Rewrite a quadratic as a(x − h)² + k, step by step.
Partial Fractions Calculator
Decompose a rational function into partial fractions with steps.
Polynomial Long Division
Divide one polynomial by another with the long-division working.
Prime Factorization Calculator
Break a number into its prime factors with the division steps.
Mixed Numbers
Mixed number ↔ improper fraction, both ways with steps.
Order of Operations
PEMDAS / BODMAS, evaluated step by step.
Factoring Calculator
Factor a polynomial and see which method did the work.
Inequality Calculator
Solve linear, quadratic and polynomial inequalities with a sign chart.
Absolute Value Solver
Solve |ax + b| equations and inequalities, case by case.
Domain & Range
Find where a function is defined, and its range where exact.
Inverse Function
Find f⁻¹(x) for linear, rational, root and log functions.
Eigenvalues
Eigenvalues and the characteristic polynomial of a matrix.
Binomial Expansion
Expand (a + b)ⁿ with exact coefficients, term by term.
Riemann Sum
Approximate an integral with rectangles, and watch it converge.
Numerical Integration
Simpson, trapezoid and midpoint compared, with error orders.
Taylor Series
Build a Taylor polynomial to any order, with its error.
Modular Arithmetic
Modular inverses, huge powers, congruences and the CRT.
Newton–Raphson Solver
Solve f(x) = 0 by Newton, secant, bisection or false position.
Interpolation Calculator
Read between data points, with the divided-difference table.
Conic Sections
Identify any conic from its general equation, rotated ones included.
Polar Coordinates
Convert either way with the correct quadrant and exact π forms.
Parametric Equations
Plot x(t) and y(t), with tangent slope, arc length and turning points.
Arc Length & Sector
Arc length, sector area and chord from a radius and an angle.
Radians & Degrees
Convert either way, with the exact multiple of π alongside.
Function Composition
Build f(g(x)) and g(f(x)) by substitution, and evaluate both.
About math tools
Each calculator gives an exact, reproducible answer and can show the steps behind it. Use them to check your work, not to replace understanding it.
When to use these tools
Common math tasks and the tool that handles each one.
Frequently asked questions
Common questions about math — the concepts behind the tools above.