Math Calculators
Free online math calculators with step-by-step solutions. Calculate percentages, generate random numbers, and solve common math problems instantly.
Percentage Calculator — 7 Modes, Step-by-Step Work
Calculate percentages 7 ways: find percent, find whole, percent change, percent difference, add/subtract percent, and reverse percent.
Fraction Calculator — Step-by-Step Solver
Add, subtract, multiply, divide, compare, and solve fractions with full step-by-step work. Chain up to 9 fractions, mixed numbers, simplify, and decimal conversions.
Equivalent Fractions Calculator — First 100 Results
Find equivalent fractions for any proper, improper, or mixed fraction. Shows the first 100 equivalent fractions instantly.
Average Calculator — Mean, Median, Mode, Range, SD
Calculate mean, median, mode, range, and standard deviation with step-by-step work. Includes weighted average mode.
Ratio Calculator — Simplify, Solve, Scale, Compare
Simplify ratios, solve proportions, scale, split, compare, and generate equivalent ratio tables — all in one tool.
Exponent Calculator — Powers, Roots, Logs, e^x
Calculate powers, roots, exponentials, and logarithms. Solve xⁿ, ⁿ√x, eˣ, and log expressions with full work shown.
Square Root Calculator — Simplify Radicals + Steps
Calculate square roots, cube roots, and nth roots. Simplify radicals with prime factorization steps and the Babylonian method walkthrough.
Quadratic Formula Calculator — Roots, Discriminant
Solve quadratic equations using the quadratic formula. Find real and complex roots, discriminant, vertex, and full step-by-step solution.
Scientific Calculator — Trig, Log, Exponents, Memory
Full scientific calculator with trigonometry, logarithms, exponents, parentheses, and memory functions. Works on mobile and desktop.
LCM Calculator — Least Common Multiple + Prime Steps
Find the Least Common Multiple of two or more numbers. Shows prime factorization, GCD, and full step-by-step work.
Long Division Calculator — Show Work Step-by-Step
Long division with full step-by-step work shown. Get quotient, remainder, decimal, and mixed fraction results.
Roman Numeral Converter — Numbers, Dates Both Ways
Convert between Roman numerals and Arabic numbers. Includes a date converter with separator support for full date strings.
Mean, Median, Mode, Range Calculator — With Chart
Calculate mean, median, mode, range, and geometric mean. Includes column chart visualization and sorted data display.
Density Calculator — ρ = m/V, All Units, Materials
Calculate density, mass, or volume using ρ = m/V. Supports multiple units with common material reference values.
Molality Calculator — b = n/W, Solve Any Variable
Calculate molality, solute mass, solvent mass, or molar mass. Solve b = n/W with unit conversions and a common solute reference.
Mass Calculator — m = ρ × V, Density to Mass
Calculate mass from density and volume (m = ρ × V). Supports multiple units with conversions and material presets.
Matrix Calculator — Multiply, Inverse, Determinant
Perform matrix operations: addition, subtraction, multiplication, transpose, determinant, inverse, power, and scalar multiply.
Hex Calculator — Add, Subtract, Convert Hex/Dec/Bin
Hex arithmetic and conversions between hexadecimal, decimal, binary, and octal. Includes bitwise operations.
Slope Calculator — Two Points, Angle, Line Equation
Calculate slope, angle, distance, and line equation from two points or a point and slope. Includes a visual graph.
Volume Calculator — 11 Shapes, ft³, m³, L, Gallons
Calculate volumes of 11 common 3D shapes with unit conversions between cubic feet, cubic meters, liters, and gallons.
Permutation & Combination Calculator — nPr, nCr
Calculate permutations (nPr) and combinations (nCr) with factorial breakdown. Supports large numbers up to n=170.
Circumference to Diameter — All Circle Values
Convert circumference to diameter, radius, and area. Enter any circle measurement and get all others instantly.