Math Calculators 🧮

64 free math calculators with step-by-step solutions — from everyday percentages and discounts to algebra, quadratics, complex numbers, logic, and advanced special functions.

64 Calculators

Most popular

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Percentage Calculator

Three modes — X% of Y, what % is X of Y, find the original

Quadratic Equation Calculator

Solve ax² + bx + c = 0 with roots, vertex, and graph

Tip amount, total bill, and per-person split

FOIL Calculator

Multiply two binomials with full step-by-step work shown

Discount Calculator

Sale price and total savings after any percentage discount

Factoring Trinomials Calculator

Factor ax² + bx + c using the AC method with full steps

Algebra & Equations

30 tools

Absolute Value Equation Calculator—Solve equations containing absolute value expressions→ Absolute Value Inequalities Calculator—Solve inequalities with absolute value notation→ Adding & Subtracting Polynomials Calculator—Combine polynomials by adding or subtracting like terms→ Box Method Calculator—Multiply polynomials using the box/grid method→ Completing the Square Calculator—Convert quadratic equations to vertex form→ Cubic Equation Calculator—Solve ax³ + bx² + cx + d = 0 with all real and complex roots→ Descartes' Rule of Signs Calculator—Determine possible number of positive and negative roots→ Diamond Problem Calculator—Find two numbers that multiply to X and add to Y→ Direct Variation Calculator—Solve y = kx proportional relationships→ Discriminant Calculator—Find b² - 4ac to determine nature of quadratic roots→ Elimination Method Calculator—Solve systems by eliminating variables→ Factoring Trinomials Calculator—Factor ax² + bx + c using the AC method step-by-step→ FOIL Calculator—Multiply two binomials using First-Outer-Inner-Last method→ Generic Rectangle Calculator—Factor quadratics using the area model→ Graphing Inequalities Calculator—Graph linear inequalities on coordinate plane→ Graphing Quadratic Inequalities Calculator—Graph parabolic inequalities with shaded regions→ Inequality to Interval Notation Calculator—Convert inequalities to interval notation format→ Interval Notation Calculator—Work with and convert interval notation→ Inverse Variation Calculator—Solve y = k/x inverse proportions→ Multiplying Binomials Calculator—Multiply (ax + b)(cx + d) with detailed steps→ Multiplying Polynomials Calculator—Multiply polynomials of any degree with full work→ Partial Fraction Decomposition Calculator—Break rational functions into simpler fractions→ Perfect Square Trinomial Calculator—Check if a trinomial is a perfect square and factor it→ Polynomial Division Calculator—Divide polynomials using long division method→ Quadratic Equation Calculator—Solve ax² + bx + c = 0 with complete solutions and graph→ Rational Zeros Calculator—Find all possible rational roots using Rational Root Theorem→ Square of Binomial Calculator—Expand (a + b)² and (a - b)² expressions→ Substitution Method Calculator—Solve systems of equations by substitution→ Synthetic Division Calculator—Fast polynomial division by (x - c) with remainder→ System of Equations Calculator—Solve 2x2 and 3x3 systems using substitution or elimination→

Complex Numbers & Special Functions

8 tools

Bessel Function Calculator—Calculate Bessel functions of the first and second kind→ Binomial Coefficient Calculator—Calculate nCr and nPr for combinations and permutations→ Complex Conjugate Calculator—Find the complex conjugate of a + bi→ Complex Number Calculator—Add, subtract, multiply, and divide complex numbers→ Complex Root Calculator—Find nth roots of complex numbers→ Error Function Calculator—Calculate erf(x) and erfc(x) for probability→ Gamma Function Calculator—Calculate Γ(n) for factorial generalization→ Hyperbolic Functions Calculator—Calculate sinh, cosh, tanh and their inverses→

Logic & Set Theory

4 tools

Power Set Calculator—Find all subsets of a given set→ Subset Calculator—Check if one set is a subset of another→ Truth Table Generator—Generate truth tables for logical expressions→ Union & Intersection Calculator—Find union, intersection, and difference of sets→

Other Math Tools

5 tools

Doubling Time Calculator—Calculate time for exponential growth to double→ Quaternion Calculator—Perform operations on 4D quaternion numbers→ Scientific Calculator—Full-featured calculator with trig, log, and exponential functions→ Scientific Notation Calculator—Convert to and from scientific notation format→ Triangle Calculator—Solve triangles given sides and angles (SSS, SAS, ASA, AAS)→

Percentages

17 tools

Average Percentage Calculator—Calculate the average of multiple percentages→ Decimal to Percent Calculator—Convert decimal numbers to percentages→ Discount Calculator—Final price after applying percentage discount→ Fraction to Percent Calculator—Convert fractions to percentage values→ Percent to Goal Calculator—Track progress toward a target or goal→ Percentage Calculator—Three modes: X% of Y, what % is X of Y, or find the original number→ Percentage Change Calculator—Percentage increase or decrease between any two values→ Percentage Decrease Calculator—Calculate how much a value decreased in percentage terms→ Percentage Difference Calculator—Find the percentage difference between two numbers→ Percentage Error Calculator—Calculate error between measured and actual values→ Percentage Increase Calculator—Calculate how much a value increased in percentage terms→ Percentage of Percentage Calculator—Calculate a percentage of a percentage value→ Percentage Point Calculator—Distinguish between percentage points and percentage change→ Relative Change Calculator—Relative change as a decimal or percentage→ Sales Tax Calculator—Calculate total cost including sales tax→ Time Percentage Calculator—Calculate time elapsed as a percentage of total→ Tip Calculator—Tip amount, total, and split between multiple people→