the whole toolbox
Educational Tools
Free online tools to help with learning, studying, and everyday tasks. All tools are completely free to use with no sign-up required.
146 free tools available ✓
Writing & Text Tools
Word Counter
Count words, characters, and paragraphs
Reading Time Calculator
Estimate reading and speaking time
Text Case Converter
Convert between text cases
Fake Word Generator
Invent pronounceable fake and nonsense words
Fancy Font Generator
Bubble, big, italic, and heart titles
Random Character Generator
Build a story character card
Random Letter Generator
Pick random letters from A to Z
Random Noun Generator
Random common nouns for grammar class
Random Topic Generator
Generate classroom essay, speech, story, and research topics
Spelling Bee Words
Grade lists for a spelling bee
Sentence Counter
Count sentences and estimate pages
Text to Binary
UTF-8 binary, Pig Latin, and Morse
Alphabetical Order
Sort lines and remove line breaks
Upside Down Text
Flip text upside down or strike it
Random Emoji Generator
Draw emoji, letters, digits, and symbols
Reading Fluency Calculator
Words correct per minute and accuracy
Haiku Generator
Check 5-7-5 haiku lines or write an acrostic
CVC Word Generator
Real CVC and digraph word lists
Parts of Speech Identifier
Color known words from a word list
Rhyming Words
Perfect rhymes for classroom words
Math & Calculation Tools
Percentage Calculator
Calculate percentages easily
Grade Calculator
Calculate grades and GPA
Unit Converter
Convert units of measurement
AP Score Calculator
Estimate an AP score from a published curve
Average Calculator
Find the mean, count, and sum
Cumulative GPA Calculator
Term GPA plus a new cumulative GPA
Fraction Calculator
Add, subtract, multiply, divide, and simplify fractions
Graph Maker
Make a bar chart, XY graph, or spider chart
Mean, Median & Mode Calculator
Find the mean, median, and mode
Mixed Fraction Calculator
Add, subtract, multiply, and divide mixed numbers
Percent Error Calculator
Compare a measurement with the accepted value
Random Card Generator
Deal cards from a 52-card deck
Random Number Generator
Fair random integers and dice
Hex to Decimal & Number Base Converter
Convert between bases 2 and 16
Decimal to Fraction Converter
Convert decimals, fractions, and percents
Factor Calculator
Factor pairs and prime factors
LCM and GCF Calculator
Find the LCM and the GCF
Long Division Calculator
Quotient and remainder with steps
Pythagorean Theorem Calculator
Find or check a right triangle
Quadratic Formula Calculator
Solve a quadratic equation
Scientific Notation Calculator
Decimals and powers of ten
Square Root Calculator
Square roots, cube roots, and powers
Unit Circle
Sine, cosine, and tangent chart
Circle Calculator
Area, circumference, radius, diameter
Midpoint Calculator
Find the midpoint and the distance
Proportion Calculator
Solve a proportion or unit price
Rounding Calculator
Round to tenths, hundredths, and more
Absolute Value Calculator
Find |n| or solve |ax + b| = c
Log Calculator
Log base 10, natural log, any base
Elapsed Time Calculator
Hours, minutes, or days between dates
Work Hours Calculator
Weekly timesheet with breaks and pay
Surface Area Calculator
Cube, prism, cylinder, sphere, cone
Density Calculator
Mass, volume, density, and speed
Z-Score Calculator
Calculate a z-score from x, mean, and sd
PEMDAS Calculator
Order of operations, one step at a time
Fraction Chart
Printable fraction, decimal, percent chart
Hundreds Chart
Print a hundreds chart or blank grid
Division Chart
Printable division and addition chart
Long Multiplication Calculator
Partial products and the box method
SAT and ACT Score Calculator
Add SAT sections or average the ACT
Coordinate Plane Generator
Print a coordinate plane or square grid
Math Flashcards
Drill facts, then take a 10-question quiz
Modulo Calculator
Remainder and quotient for a mod n
Multiples Calculator
List multiples of a number and check divisibility
Number to Words Converter
Spell numbers and check amounts
LCD Calculator
Least common denominator of fractions
Military Time Converter
Military time, regular time, and a chart
Time to Decimal Calculator
Hours and minutes to decimal hours and back
Age Calculator
Years, months, and days from a birth date
Quartile Calculator
Q1, Q3, and the interquartile range
Variance Calculator
Sample and population variance
Combination and Permutation Calculator
nCr combinations and nPr permutations
Cube Root Calculator
Simplify cube roots and see the decimal
Unit Rate Calculator
How much for 1 unit
Percent Change Calculator
Percent change, difference, and rate of change
Ratio Calculator
Simplify ratios and build equivalent ratios
Significant Figures Calculator
Count and round significant figures
Speed Distance Time Calculator
Speed, distance, and time
Percentile Calculator
Percentile rank and the value at a percentile
Diamond Problem Solver
Factor pair for a product and a sum
Standard Deviation Calculator
Sample and population standard deviation
Slope Calculator
Slope, point-slope, and y = mx + b
Compound Interest Calculator
Periodic and continuous compound interest
Study & Productivity Tools
Pomodoro Timer
Focus timer for productive studying
Flashcard Maker
Create study flashcards
Random Name Picker
Randomly select from a list
Word Search Generator
Create custom word search puzzles
Crossword Puzzle Generator
Create custom crossword puzzles
Word Scramble Generator
Create word scramble puzzles
Matching Worksheet Generator
Create matching worksheet puzzles
Fill in the Blank Generator
Create cloze/fill-in-the-blank worksheets
Math Worksheet Generator
Generate math practice worksheets
Number Tracing Worksheet
Create number tracing practice sheets
Telling Time Worksheet
Create clock reading practice worksheets
Skip Counting Worksheet
Create skip counting sequence worksheets
Handwriting Practice Generator
Create custom handwriting tracing sheets
Sight Word Flashcards
Create printable sight word flashcards
Spelling Test Generator
Create spelling tests with answer keys
Sentence Scramble Generator
Create sentence unscrambling activities
Multiple Choice Quiz Maker
Create multiple choice quizzes with answer keys
True or False Quiz Generator
Create true/false quizzes with answer keys
Word Cloud Generator
Create visual word clouds from text
Word Shape Generator
Create word shape outline puzzles
Acrostic Puzzle Generator
Create puzzles with hidden words
Word Ladder Generator
Create one-letter-change word puzzles
Math Fact Family Generator
Create fact family worksheets
Place Value Worksheet Generator
Create place value practice worksheets
Color by Number Math
Math problems meet coloring fun
Paint by Number Generator
Turn photos into paint by number templates
Sudoku Generator
Generate Sudoku puzzles for all levels
Magic Square Generator
Create magic square number puzzles
Letter Tracing Worksheet Generator
Create letter tracing worksheets
Name Tracing Generator
Create custom name tracing sheets
Sight Word Tracing Generator
Create sight word tracing worksheets
Cursive Handwriting Generator
Create cursive writing practice sheets
Random Drawing Generator
Random drawing ideas and art prompts
Random Food Generator
Decide what to eat in one click
Genogram Maker
Create genograms and pedigree charts
Pictionary Word Generator
Random words and phrases to draw
Pixel Art Grid Maker
Paint pixels or print a blank grid
Random Object Generator
Pick a random everyday object
Rubric Generator
Build a printable scoring rubric
Seating Chart Maker
Arrange students at classroom desks
Study Guide Generator
Format notes into a printable study guide
Cornell Notes, KWL & Frayer Templates
Fill and print a classroom organizer
US States Quiz
Quiz capitals and postal abbreviations
This or That Questions
Two-choice questions for class
Classroom Timer
Large countdown for class activities
Bingo Caller
Call 75-ball or 1 to N numbers
Lesson Plan Template
Fill in and print a lesson plan
Classroom Sheets
Attendance, reading log, and class roster
Name Plate Maker
Print classroom desk name plates
Behavior Chart Maker
Print a blank sticker reward chart
Cryptogram Maker
Encode a sentence as a letter puzzle
Lined Paper Generator
Wide, college, primary, or graph paper
Weekly Planner
Print a fill-in student weekly planner
Reference Tools
Multiplication Table
Interactive times tables
Color Picker
Pick and convert colors
Lorem Ipsum Generator
Generate placeholder text
Random State Generator
Pick a random US state
Random Animal Generator
Pick a random animal by class
Random Date Generator
Draw random dates and birthdays
Roman Numeral Converter & Chart
Convert numbers and Roman numerals
HEX to RGB Converter
Convert RGB to hex and back
Alphabet Chart
Printable ABC chart with picture words
Metric Conversion Chart
Metric to standard conversion chart
About Our Educational Tools
ATC21S provides free educational tools for students, teachers, and parents. Our tools are designed to be simple, effective, and accessible to everyone.
Why Use Our Tools?
- 100% Free: All tools are completely free to use with no hidden costs
- No Sign-up Required: Use any tool instantly without creating an account
- Privacy-Focused: Your data stays in your browser - we don't store your information
- Mobile-Friendly: All tools work on desktop, tablet, and mobile devices
- Educational Focus: Tools designed with learning and education in mind
Request a Tool
Have an idea for an educational tool you'd like to see? Contact us with your suggestion!