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Student Tools (110)
Browse our most popular student tools first. Every tool runs free in your browser.
Wordle Game
Classic 5-letter word guessing game. 6 attempts, color-coded feedback, virtual keyboard, hard mode, and win/loss statistics. Unlimited plays.
Sudoku Game
Full Sudoku with 4 difficulty levels (Easy–Expert), pencil marks, conflict highlighting, hints, and timer.
GPA Calculator
Calculate your GPA with any grading scale
Unit Converter
Convert between 130+ units across 13 categories: length, weight, temperature, volume, area, speed, time, data, pressure, energy, power, frequency, and angle
2048 Game
Slide and merge numbered tiles to reach 2048. Arrow key and swipe controls, score and best-score tracking.
Tetris Game
Full Tetris with all 7 tetrominoes, ghost piece, hold, hard drop, level-based scoring, and high score.
Chess vs AI
Full chess vs AI - legal moves, castling, en passant, check/checkmate, 3 difficulty levels, move history.
Periodic Table
Interactive periodic table with all 118 elements - color-coded categories, search, state/block filters, and a full property detail panel.
Connections Game
Group 16 words into 4 hidden categories. 4 difficulty tiers, 4 mistake chances, shuffle, and 20 pre-built puzzles.
Typing Speed Test
Test your typing speed with timed or word-count modes, real-time WPM and accuracy, 5 content categories, character-by-character highlighting, grade S–F, and results history.
Scientific Calculator
Full scientific calculator with trig (sin/cos/tan/inverses), log/ln, factorials, powers, roots, constants (π, e, φ), and calculation history. DEG/RAD toggle.
Snake Game
Classic snake on a 20×20 canvas grid. Arrow/WASD controls, 3 speed modes, high score, pause.
Percentage Calculator
Calculate percentages, percentage change, and more
BMI Calculator
Calculate Body Mass Index in metric or imperial. Shows BMI category, healthy weight range, BMI Prime, and Ponderal Index.
Physics Formula Sheet
Reference of 40+ physics formulas across 8 categories with variable definitions, units, usage notes, and built-in mini-calculators.
Reaction Time Test
Click when the screen turns green. 5 rounds, millisecond precision, average time, and percentile rating.
Citation Generator
Generate APA, MLA, and Chicago citations
Birthday & Anniversary Countdown
Track birthdays, anniversaries, and special dates with live day-hour-minute-second countdowns, yearly recurrence, reminders, and full-screen display
Time Converter
Convert between 19 time units instantly - scientific, standard, calendar, and astronomical - with all results shown at once
Periodic Table Quiz
Test element knowledge with 4 quiz modes (multiple choice, symbol↔name, atomic# → symbol), spaced repetition, timers, category filters, streak tracking, and a missed-elements review.
Flag Quiz Game
Identify 120+ country flags from emoji. 4-choice quiz, 15s timer per question, 3 lives, high score.
Spelling Bee Game
Form words from 7 honeycomb letters - center letter required. Score points, find pangrams, reach Genius rank.
Minesweeper Game
Classic Minesweeper - 3 difficulties, first-click safety, right-click flags, cascade reveal, timer, best time.
CGPA Calculator
Calculate cumulative GPA across multiple semesters
Speed Converter
Convert between 22 speed units instantly - metric, imperial, nautical, and scientific reference speeds - with all results shown at once
Data Storage Converter
Convert between 23 data storage units instantly - bits, bytes, SI decimal, IEC binary, and extreme scale - with all results shown at once
BMR & TDEE Calculator
Calculate Basal Metabolic Rate and TDEE using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas.
Speed Distance Time Calculator
Solve for speed, distance, or time using the d = s × t formula. Multi-unit support (km/h, mph, m/s, knots, min/km pace) with speed equivalents table.
Flappy Bird Game
One-tap obstacle-dodging game. Click or Space to flap, avoid pipes, high score saved.
Human Benchmark
4 cognitive tests: Reaction Time, Number Memory, Verbal Memory, Sequence Memory. Compare scores to averages.
Trivia Quiz Game
200+ questions across 8 categories. 4 choices, 30s timer, explanations after wrong answers, per-category high scores.
Paraphrase Helper
Get suggestions to rephrase sentences in your own words
Grade Calculator
Calculate overall grade from assignments, find required exam score for target grade, and compute GPA equivalent.
Pomodoro Timer
Stay focused with a customizable Pomodoro timer. Choose Classic (25/5/15), Extended (50/10/20), or Deep Work (90/15/30) presets, track daily sessions and total focus time, with sound alerts and auto-start.
Flashcard Maker
Create flashcard decks, study with flip animation, mark cards as known or needs review, shuffle, and track your progress. Saved to your browser automatically.
Mind Map Creator
Create visual mind maps with draggable nodes, color-coded branches, zoom/pan canvas, collapse/expand trees, and PNG export.
Bubble Shooter
Shoot colored bubbles to pop groups of 3+. Hex grid, wall bounce, floating-bubble combos, score tracking.
Weight Converter
Convert between 37 weight and mass units instantly - metric, imperial, troy, scientific, and Asian traditional units - with all results shown at once
Sleep Cycle Calculator
Find optimal bedtimes and wake times for complete 90-minute sleep cycles. Nap optimizer and sleep debt calculator included.
Date Difference Calculator
Find difference between dates in years, months, days. Age calculator, add/subtract dates, and business days counter.
Zodiac & Astrology Calculator
Find Western and Vedic zodiac signs, Chinese zodiac animal, and Life Path Number from any birthdate.
Multiplication Table Generator
Generate custom multiplication tables in full grid or single-number mode. Highlight multiples and perfect squares, 5 color schemes, practice mode, and CSV/print export.
Word Search Game
Find hidden words in a 15×15 letter grid. 8 directions, 6 themed categories, click-and-drag selection, timer.
Geography Guesser
Guess the mystery country from progressive hints: continent, region, population, coastline, neighbors, first letter.
Length Converter
Convert between 25+ length and distance units instantly - metric, imperial, nautical, astronomical, and typography units - with all results shown at once
Equation Solver
Solve linear, quadratic, and simultaneous equations with step-by-step solutions. Shows discriminant, roots, vertex, Cramer's rule, and working.
Calorie Deficit Calculator
Calculate your daily calorie deficit for weight loss. Set rate, see time to goal weight, and get macro breakdown at target calories.
Pregnancy Due Date Calculator
Calculate estimated due date from LMP, conception, IVF, or ultrasound. Shows gestational age, trimester, and key milestones.
Reading Speed Calculator
Test your reading speed (WPM) with 3 built-in texts (Easy/Medium/Hard) or custom text. Includes comprehension quiz, accuracy score, WPM scale, and history.
History Timeline Maker
Build visual history timelines with BCE/CE dates, 8 color-coded categories, event descriptions, search/filter, and JSON export/import. Saved in your browser.
Aim Trainer
Click appearing targets as fast as possible. 15/30/60s rounds, 3 target sizes, accuracy and best score.
Capital City Quiz
Name the capital of 150+ countries. Multiple choice or typed mode, timer, 3 lives, streak bonus, best score.
Connect Four
Drop pieces to connect 4 in a row vs minimax AI (depth 5). Column preview, win highlighting, score tracking.
Exam Routine Maker
Build and manage your exam schedule with countdown timers and a study plan
Area Converter
Convert between 37 area units instantly - metric, imperial, East Asian, South Asian land, and scientific units - with all results shown at once
Fraction Calculator
Add, subtract, multiply, divide, and simplify fractions with step-by-step working. Shows result as fraction, decimal, and mixed number.
Ovulation & Fertility Calculator
Find ovulation date and fertile window from LMP and cycle length. Shows next 3 cycles with calendar-style color coding.
Calendar
A clean, browser-based personal calendar. Add, edit, and delete events with custom colors, date ranges, times, and recurring schedules. All data saved locally - no login required. Export to .ics for any calendar app.
Memory Card Match
Flip emoji card pairs in 3 difficulty sizes and 3 themes. Timer, flip counter, and best-score tracking.
Volume Converter
Convert between 35+ volume units instantly - metric, US customary, UK imperial, cooking, and engineering units - with all results shown at once
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any custom base (2–36). Includes ASCII/character mode and nibble-grouped binary display.
Macro Calculator
Calculate daily protein, carbs, and fat targets. Preset splits: Standard, Low Carb, High Protein, Ketogenic, and Custom.
Time Duration Calculator
Add multiple time durations, calculate work hours, convert between 20 time zones, and estimate travel time.
Dog & Cat Age Calculator
Convert dog years to human years using the 2019 scientific formula. Size-adjusted rates and cat age included.
Math Wordle (Nerdle)
Guess a hidden 8-character arithmetic equation in 6 tries. Nerdle-style color-coded feedback for digits and operators.
GCD & LCM Calculator
Find the Greatest Common Divisor (GCD/HCF) and Least Common Multiple (LCM) of up to 5 numbers, with prime factorization tables and Euclidean algorithm steps.
Body Fat Calculator
Estimate body fat percentage using US Navy, BMI-based, or skinfold methods. Shows lean mass, fat mass, and fitness category.
Triangle Calculator
Solve right triangles (Pythagorean), any triangle (SSS/SAS/ASA), and calculate area. Shows all angles, sides, inradius, circumradius.
Electricity Bill Calculator
Calculate electricity costs by appliance. Monthly kWh, bill, and CO2 footprint. Tiered billing and preset appliances.
Speed Math Game
Solve 20 arithmetic problems, 10s each. Time bonus, 5-streak multiplier, 3 difficulty levels, best score.
Battleship Game
Place your fleet and battle the AI. Hunt-and-target AI. All 5 ships, 10×10 grid, hit/miss/sunk indicators.
Matrix Calculator
Add, subtract, multiply matrices, compute determinants and inverses (up to 4×4) with full step-by-step cofactor expansion and identity verification.
Water Intake Calculator
Calculate recommended daily water intake from weight, activity, and climate. Includes hourly schedule and unit conversions.
Weighted Average Calculator
Calculate weighted average of up to 20 values. Auto-normalizes weights and compares to simple average.
Recipe Scaling Calculator
Scale any recipe up or down. Smart unit conversion (tsp to tbsp to cup). Copy scaled recipe. Baking mode warnings.
Music Decade Guesser
Guess which decade a song is from. 160+ songs across 1950s–2020s, all genres, streak scoring.
Study Timetable Generator
Create a personalized study schedule
Prime Number Checker
Check if a number is prime, generate all primes in a range using Sieve of Eratosthenes, and find the prime factorization of any number.
Heart Rate Zone Calculator
Calculate 5 training heart rate zones using Tanaka, Karvonen, and basic formulas. Shows BPM ranges and zone descriptions.
Circle Calculator
Calculate radius, diameter, circumference, and area from any single measurement. Includes sector, annulus, and segment calculations.
Carbon Footprint Calculator
Estimate annual CO2 from transport, home energy, food, and shopping. Compare to world average and 1.5C targets.
Numerology Calculator
Calculate Life Path, Expression, Soul Urge, and Personality numbers from name and birthdate. Includes compatibility.
Simon Says Game
Memory sequence game with 4 colored buttons and audio tones. Repeat the growing sequence to advance rounds.
Roman Numeral Converter
Convert between Arabic numbers (1–3999) and Roman numerals instantly. Shows symbol breakdown, historical era note, and quick reference table.
Ideal Body Weight Calculator
Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas. Includes healthy BMI range and adjusted body weight.
Geometry Volume Calculator
Calculate volume and surface area of 10 3D shapes: sphere, cylinder, cone, cube, cuboid, prism, pyramid, torus, ellipsoid, capsule.
Nutritional Info Calculator
Track daily calories, protein, carbs, and fat across meals. 50-food database, daily goal progress bar, macro breakdown.
Color Match (Stroop Test)
Click the INK color of a displayed color word. 60-second Stroop test, combo multiplier, −1s wrong-answer penalty.
Checkers Game
Classic checkers vs minimax AI (depth 4). Mandatory jumps, multi-jump chains, king promotion.
Gas Volume Converter
Convert between 23 gas volume units instantly - metric, US gas billing (SCF, CCF, MCF, BCF, TCF), SI reference (Sm³, Nm³), and imperial - with all results shown at once
Logarithm Calculator
Calculate log base 10, natural log (ln), log base 2, or any custom base. Shows antilog, change-of-base formula, and logarithm rules reference.
Probability Calculator
Calculate basic, compound, conditional, and normal distribution probabilities. Includes Bayes theorem and z-scores.
Factorial Calculator
Calculate factorials (n!), double factorials (n!!), nPr permutations, and nCr combinations. Shows Stirling's approximation for large n.
Alcohol Unit Calculator
Calculate alcohol units and calories from drinks. Compares to weekly guidelines and estimates sober-up time.
Poker Hand Odds Calculator
Texas Hold'em outs calculator, pot odds, and hand probability table using Rule of 2 and 4.
Viva Question Generator
Generate practice viva/oral exam questions for your topic
Modulo Calculator
Calculate remainders, clock arithmetic, modular exponentiation, and remainder tables. Essential for cryptography, programming, and number theory.
Permutation & Combination Calculator
Calculate nPr and nCr with formulas. Pascal triangle, repetition modes, and word arrangement calculator.
Assignment Cover Page Generator
Generate professional assignment cover pages
Baking Ratio Calculator
Calculate baker's percentages for bread, sourdough, pizza, and croissants. Enter total weight or flour weight.
VO2 Max Calculator
Estimate VO2 max from Rockport Walk Test, 1.5-mile run, or non-exercise formula. Shows fitness category by age and sex.
Presentation Script Generator
Generate presentation speaking scripts from bullet points
Volume - Dry Converter
Convert between 21 dry volume units instantly - metric, US dry (pint, quart, gallon, peck, bushel, dry barrel), UK imperial (pint to quarter), and cubic - with all results shown at once
Photon Energy Converter
Convert photon energy between 23 units - eV, Joules, Hartree, Hz, THz, nm, Å, cm⁻¹, Kelvin - using exact 2019 SI constants for physics, optics, and spectroscopy
Torque Converter
Convert between 14 torque units - newton-meters, lbf·ft, lbf·in, kgf·m, dyn·cm, and more - for automotive, engineering, and construction applications
Word Count Target Calculator
Plan how to reach your word count target
Force Converter
Convert between 16 force units - Newtons, lbf, kgf, kip, dyne, poundal, tonne-force, and more - for physics, engineering, and construction
Specific Volume Converter
Convert specific volume (m³/kg, ft³/lb, L/kg, cm³/g) and volume charge density (C/m³, μC/cm³, mC/L) - dual-tab converter for thermodynamics, HVAC engineering, and electrostatics
Photon Flow Rate Converter
Convert photon flow rate across 18 units - photons/s, kph/s, Gph/s, ph/ns, ph/µs, Einstein/s, µE/s - covering SI prefixes, sub-second intervals, longer time periods, and molar units
Lumber Volume Converter
Convert between 17 lumber and timber volume units - board feet, MBF, cord, cunit, hoppus foot, stere, Petersburg Standard, and metric/imperial - for woodworking, construction, and forestry
About our student tools
GPA calculators, citation generators, and study helpers Unlike most online utilities, TechTools processes everything locally with client-side JavaScript, so your data never leaves your device. There's nothing to download and no account to create - open any of our 110 student tools, get your result in seconds, and you're done. Whether you're on desktop, tablet, or phone, the tools work in any modern browser, completely free.
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