UD5 Toolkit
Factorial Calculator – n! for Integers & Large Numbers
Compute the factorial of any positive integer up to 170+ with full precision output. Also shows double factorial and explains the multiplication steps.
Tag: Math Tools - Calculators & Solvers
33+ toolsLine Equation Finder – Two Points & Slope-Intercept Form
Generate the equation of a line from two points or a point and slope. Outputs in slope-intercept, point-slope, and standard form with graph coordinates.
Ratio Simplifier – Reduce Ratios to Lowest Terms
Simplify any ratio (e.g., 15:10) to its lowest terms. Also converts ratios to fractions and percentages, useful for mixing solutions, scaling recipes, or math class.
GCD & LCM Calculator – Greatest Common Divisor & Least Common Multiple
Find the greatest common divisor and least common multiple of two or more numbers. Uses prime factorization and Euclidean algorithm with step-by-step output.
Fibonacci Sequence Generator – First N Terms & Golden Ratio
Generate the Fibonacci sequence up to any number of terms. Displays each term, ratios approaching φ, and a visual of the golden spiral for math enthusiasts.
Quadratic Equation Solver – ax² + bx + c = 0 Roots
Solve any quadratic equation by entering coefficients a, b, and c. Computes real and complex roots using the quadratic formula and shows the discriminant.
Decimal to Mixed Number Converter – Simple Fraction Form
Turn a decimal number into a mixed number or improper fraction. Shows step-by-step simplification to help understand the conversion process better.
Prime Number Racer – Tap the Primes as Fast as Possible
Tap only the prime numbers as they scroll across the screen. Avoid composites and stay alive in this fast‑paced math game that tests your number sense.
Cubic Equation Solver – ax³ + bx² + cx + d = 0
Find all real and complex roots of a cubic polynomial. An online tool for algebra students and engineers that implements Cardano's method and numerical approximation.
Percentage to Fraction Converter – Simplify Math Instantly
Convert any percentage to a simplified fraction and decimal. Great for students learning math, teachers preparing materials, or anyone who needs a quick conversion.
Multiplication Flashcard Practice – Timed Math Drills
Practice times tables with interactive flashcards and a countdown timer. Choose specific numbers to drill, track your score, and improve mental math speed.
Rounding Mountain – Visual Number Line for Rounding
Type a number and see it on a number line with a “mountain” peak. Visualizes whether it should round up or down to the nearest 10, 100, or 1000.
Prime Factorization Calculator – Online Factor Tree
Enter a number and see its prime factors displayed as a tree. Visual math helper.
CSS abs() and sign() Functions Demo - Online Math
Use the abs() and sign() CSS functions to create interesting layouts. See computed values live. Cutting‑edge CSS.
Math Worksheet Generator - Online Printable Drills for Kids
Generate printable math worksheets for addition, subtraction, multiplication, and division. Choose difficulty and number of problems. Answer key included.
Conic Sections Playground - Online Circle Ellipse Parabola
Adjust parameters and see how the slice of a cone creates different conic sections. Interactive learning.
Number Line Generator - Online Printable Math Visual Aid
Create custom number lines (0-20, negative, fractions, decimals) for math education. Adjustable ticks and labels. Instant download.
Prime Factor Tree Generator - Online Visual Factorization
Enter a number and see an animated factor tree breaking it down to primes. Perfect for teaching factorization.
Math Expression Evaluator - Online Type & Calculate
Type a mathematical expression like 'sqrt(16)+sin(pi/2)' and get the result instantly. Supports popular functions. Local.
Ellipse Drawing Tool - Online Interactive Geometry
Draw perfect ellipses by dragging focal points and a point on the curve. See the equation update dynamically. Educational.
Mersenne Prime Checker - Online 2^p‑1 Validation
Check if a number of the form 2^p‑1 is a Mersenne prime. Quick Lucas‑Lehmer test simulation for small p.
Probability Calculator - Online Odds & Combinatorics Tool
Compute probability for simple events, as well as permutations and combinations (nPr, nCr). Useful for statistics and game theory. Browser-based math.
Percentage Calculator - Online Find Percent, Increase & Decrease
Perform common percentage calculations: find percent of a number, percentage increase/decrease, and more. Simple, fast, and always available for free.
Koch Snowflake Visualizer - Online Fractal Curve Generator
Generate the Koch snowflake fractal to a desired iteration level. See how the perimeter grows. Interactive geometric art.
Random Math Problem Generator - Online Arithmetic Drill
Generate a sheet of random arithmetic problems (+, -, ×, ÷) with configurable digits. For kids and brain training.
Euler's Number Viewer - Online Show Many Digits of e
View thousands of digits of Euler's number (e). Click to copy a block. For math enthusiasts.
2D Vector Field Plotter - Online Math and Physics
Enter a mathematical function for dx and dy and see the vector field arrows. Perfect for studying differential equations.
Mental Math Trainer - Online Timed Arithmetic
Solve random arithmetic problems under a time limit. Track your score and improve mental calculation. No data collected.
Next Prime Number Finder - Online Integer Sequence
Enter any integer and quickly find the next prime number after it. Perfect for hashing and puzzles.
Function Graph Plotter - Online Math Visualizer 2D
Plot one or more mathematical functions f(x) on a 2D canvas. Zoom, pan, and see intersections. Great for calculus and algebra. Purely client‑side.
Online Scientific Calculator - Free Advanced Math Tool
Full-featured scientific calculator with trigonometric, logarithmic, and exponential functions. Clean interface and keyboard support. No installation required.
Pi Digits Viewer - Online Scrolling Infinite π
Scroll through thousands of pre‑computed digits of π. Search for a specific string of digits. For math lovers.
Magic Square Generator - Online Create n x n Constant Sum Grid
Generate magic squares of odd order (3x3, 5x5, …). See the sum constant and verify rows, columns, diagonals. Educational math toy.