Math, Science & Engineering
Scientific calculator, percentage differentials, sample statistics, quadratic equations, matrices, and compound interest.
All Math, Science & Engineering
Every tool runs 100% locally in your browser with zero server uploads.
Scientific & Trigonometric Calculator
Evaluate advanced mathematical expressions with trigonometry, logarithms, factorials, roots, and memory recall.
Percentage Change & Difference Calculator
Calculate percentage increase, percentage decrease, relative difference, markups, and discounts with formula breakdowns.
Standard Deviation & Descriptive Statistics Calculator
Compute sample and population standard deviation, variance, mean, median, mode, IQR, and quartiles from raw datasets.
Quadratic Equation Solver with Factoring & Roots
Solve quadratic equations ax² + bx + c = 0 with real and complex roots, discriminant analysis, and vertex coordinates.
Fraction to Decimal & Mixed Number Calculator
Add, subtract, multiply, and simplify fractions with step-by-step common denominators and mixed number conversions.
2x2 & 3x3 Matrix Determinant & Transpose Calculator
Calculate determinants, matrix transpose, trace, scalar multiplication, and inverse matrices for 2x2 and 3x3 systems.
Triangle Trigonometry & Angle Solver (Law of Sines/Cosines)
Solve any oblique or right triangle given SSS, SAS, ASA, or AAS using the Law of Sines and Law of Cosines.
Compound Interest & Long-Term Investment Calculator
Project investment growth with compounding frequencies, regular monthly contributions, and yearly schedule tables.
2D & 3D Geometry Area, Perimeter & Volume Calculator
Instant geometric calculations for circles, spheres, cylinders, cones, pyramids, and cubes with formula breakdowns.
Prime Factorization, GCD & LCM Calculator
Decompose integers into prime factor trees and find Greatest Common Divisor (GCD) and Least Common Multiple (LCM).
Mean, Median, Mode & Range Calculator
Calculate arithmetic mean, median, mode, range, variance, standard deviation, and IQR with step-by-step solutions.
Permutation & Combination (nPr & nCr) Calculator
Calculate permutations nPr, combinations nCr, factorials n!, and Pascal's triangle rows with BigInt precision.
Ratio Simplifier & Proportion Solver
Simplify ratios (A:B), solve unknown proportions (A:B = C:X), and divide totals into multi-part ratios.
Programmer's Bitwise & Radix Calculator
Convert between Binary, Hex, Octal, and Decimal with bitwise logic operators (AND, OR, XOR, NOT, bit shifts).
Circle, Cylinder & Sphere Geometry Calculator
Calculate radius, diameter, circumference, area, surface area, and volume for 2D circles, cylinders, and spheres.
Pythagorean Theorem & Right Triangle Solver
Solve a² + b² = c² to find missing legs, hypotenuse, angles (degrees/radians), perimeter, and area with canvas drawing.
Systems of Linear Equations Solver (2x2 & 3x3)
Solve systems of 2 and 3 simultaneous linear equations using Cramer's rule with step-by-step determinant solutions.
Logarithm & Natural Log (ln) Calculator
Calculate common log₁₀, natural log ln, binary log₂, and custom base log_b(x) with change-of-base identities.
Exponent, Power & Nth Root Calculator
Calculate integer, negative, and fractional powers x^y, square roots, cube roots, and general nth roots.
Slope, Line Equation & Distance Calculator
Calculate slope m, y-intercept b, line equation y = mx + b, standard form, and distance between two 2D points.
Roman Numerals Converter & Math Calculator
Convert Arabic numbers (1 to 3,999,999) to Roman numerals, decode Roman numerals, and perform Roman arithmetic.
Multi-Number GCD & LCM Calculator
Find Greatest Common Divisor (GCD/GCF) and Least Common Multiple (LCM) for 2, 3, 4, or more numbers with prime trees.
Z-Score & Standard Normal Distribution Calculator
Calculate z-scores, normal distribution percentiles P(Z < z), probability density, and visualize the bell curve.
Scientific & Engineering Notation Converter
Convert numbers between standard decimal, scientific notation (a × 10^b), engineering notation, and E-notation.
2D & 3D Vector Math (Dot & Cross Product)
Calculate 2D and 3D vector magnitudes, unit vectors, dot product a·b, cross product a×b, and angle between vectors.
Arithmetic & Geometric Sequence Calculator
Find the nth term, common difference/ratio, and sum of n terms for arithmetic and geometric progressions.
Modulo & Modular Arithmetic Calculator
Calculate A mod B, handle negative numbers, modular exponentiation (A^B mod C), and modular multiplicative inverse.
Stacked Discount & Sales Tax Calculator
Calculate compound/stacked discounts (e.g. 30% off + extra 15% off), before/after sales tax, and savings breakdown.
Matrix Multiplication & Addition Calculator
Multiply, add, subtract, and scale 2x2 and 3x3 matrices with step-by-step row-by-column cell calculation displays.
Fibonacci Sequence & Golden Ratio Generator
Generate N Fibonacci numbers with BigInt precision, test Fibonacci membership, and calculate golden ratio phi.
Quadratic & Cubic Equation Solver
Solve quadratic (ax²+bx+c=0) and cubic (ax³+bx²+cx+d=0) equations with exact real and complex roots, discriminant, and step-by-step working shown.
Statistics Calculator (Mean, Median, SD, Variance)
Compute descriptive statistics for any dataset: mean, median, mode, range, standard deviation, variance, quartiles, skewness, and kurtosis.
Prime Factorization & Factor Tree Generator
Find the complete prime factorization of any integer up to 10 trillion and generate a visual factor tree decomposition for educational use.
Matrix Calculator (Add, Multiply, Transpose, Determinant)
Perform matrix addition, subtraction, scalar multiplication, matrix multiplication, transpose, determinant, and inverse on 2×2 to 4×4 matrices.
Matrix Calculator (Add, Multiply, Transpose, Determinant)
Perform matrix addition, subtraction, scalar multiplication, matrix multiplication, transpose, determinant, and inverse on 2×2 to 4×4 matrices.
Roman Numeral Converter
Convert any integer (1–3,999,999) to Roman numerals or parse any Roman numeral string back to decimal with subtractive notation rules explained.
Octal Converter Tool
Convert between octal (base-8), decimal (base-10), binary (base-2), and hexadecimal (base-16) number systems.