Free tools for students

Calculators, flashcards, a study planner, a dictionary and the PDF tools you need for homework and revision. Free, with no sign-up.

Illustration for Free tools for students

23 tools

GPA CalculatorEnter your letter grades and credits to get your GPA on the standard 4.0 scale. Switch on weighted grades for honors and AP or IB classes, or add your GPA so far to see your cumulative GPA. The sums are shown, and it's an estimate: your school's own scale is the one that counts.
Study PlannerA student planner for your weekly class timetable, every assignment and exam by due date in a list or a month calendar, and a focus timer that counts study hours per subject. Plan spaced revision before each exam, break an assignment into dated steps, repeat weekly tasks, and track your marks, subject averages and overall grade on the scale your school uses. It syncs across your devices, works offline and installs like an app.
FlashcardsMake flashcards in seconds, by hand, pasted from a list or imported from Quizlet or Anki, and study them with spaced repetition: each card comes back right before you'd forget it, so a few minutes a day is enough. Decks and cards are free and unlimited, with typed answers, Learn and Test modes for going through a whole deck before an exam, and it works offline.
Vocabulary BuilderSave the words you meet in any of 21 languages, with the sentence you found them in, or add a ready-made pack of everyday words, from food and family to verbs and feelings. Vocabulary Builder brings each word back just before you'd forget it, keeps every day's reviews to a size you choose, and never punishes a missed day: after a break it eases you back in. Works offline, in your own language.
Scientific CalculatorA full scientific calculator for your browser: sin, cos, tan and their inverses in degrees or radians, log and ln, powers, roots, factorials, π and e, brackets, memory and a history of your answers. Type a whole sum or use the keys.
Fraction CalculatorType two fractions or mixed numbers, pick add, subtract, multiply or divide, and get the answer in lowest terms, as a mixed number and as a decimal, with the working shown step by step. Exact for numbers of any length.
Percentage CalculatorWork out X% of a number, what percent one number is of another, and the percentage increase or decrease between two values, all on one page. 15% of 200 is 30, and 80 to 100 is a 25% increase. Answers update as you type.
Unit ConverterConvert between metric and imperial units of length, weight, temperature, volume, area, speed, time and data size, like cm to inches, kg to lbs, Celsius to Fahrenheit or miles to km. Results appear as you type, using exact conversion factors.
LCM and GCF CalculatorType two or more whole numbers and get their least common multiple (LCM) and greatest common factor (GCF), with each number split into primes and the steps shown. Works with big numbers too.
Word CounterPaste or type your text to count words, characters (with and without spaces), sentences and paragraphs as you type, plus reading time, speaking time and your most used words. Nothing to click: the numbers update live. What you type stays on your device.
Character CounterCount characters with and without spaces as you type, and see how many you have left for X posts, text messages, meta descriptions, Instagram bios, LinkedIn, YouTube and your own limit. Also counts spaces, letters, lines and bytes.
Grammar & Writing CheckerPaste your writing and see each mistake marked right in your text, with the fix and the reason. Accept fixes one by one or all at once, ignore what you meant, and add names and terms to your own word list. Readability notes show long sentences, possible passives and a reading grade as you write. English grammar and spelling are checked right on your device, free, and nothing is sent. With Pro, check any of 21 languages, get every explanation in your own language, or rewrite in a friendly, formal or concise tone.
DictionaryLook up words in 21 languages, even offline: clear meanings, example sentences and words that mean the same, with the most common sense first. Typed “went” or “mice”? It finds “go” and “mouse”. Star words to keep them, test yourself on them, or send them to Vocabulary Builder, and meet a new word every day in the language you're reading. With Pro, have any word explained in your own language, and see its opposites, related words and the phrases people say with it.
TranslatorTranslate between any of 21 languages. Translation runs on your device, free: each language pair downloads once and then works offline, and nothing you write is sent. Talk with someone face to face in two languages, save the phrases you need, and find recent translations again. With Pro, choose a polite or casual tone, see other ways to say it and short notes on why it's worded that way in your own language, and speak instead of typing on any device.
Learn LanguageLearn any of 21 languages from your own, with 239 everyday phrases in 23 situations and 717 core words in 25 topics. Read and listen first, then practise when you want: hear a phrase and pick its meaning, match pairs, and review what you know just before you'd forget it. A week streak with rest weeks built in, and no hearts to lose. With Pro, practise real conversations with a patient tutor by speaking or typing, corrected the way you prefer, and keep three phrases from each one.
Typing TestTake a timed typing test in 15, 30 or 60 seconds and see your words per minute and your accuracy. The timer starts when you type your first character, and every mistake shows in red as you go.
Focus TimerAn online focus timer: 25 minutes of work, a 5-minute break, and a longer 15-minute break after every four sessions. A chime plays when each phase ends, the time left shows in the browser tab, and you can set every length from 1 to 180 minutes.
NotesJot down ideas, lists and anything you need to remember, and sketch a map, a plan or a doodle right in the note. Write with light Markdown (headings, bold, lists, tasks, links) and read it back formatted. Find any note in a second with search, folders, colours, pins and tags. Turn a note into a checklist, pull the to-dos out of it, archive what's done, and restore anything from the trash for 30 days. Your notes sync across your devices and work offline.
Read AloudPaste text or open a .txt or .md file and your device reads it to you, with the sentence being read lit up as it goes. Tap any sentence to start there, skip by sentence or paragraph, slow the voice down or speed it up from half speed to double, and set a sleep timer for bedtime. It uses the voices already on your phone or computer, so your text is never sent to a voice service, and it reads without a connection wherever your device's voices work offline. Texts you add are kept in a reading list that remembers where you stopped in each.
Merge PDFCombine up to 30 PDF files into one document, in the order you choose, with every page copied exactly as it was. Add files, move them up or down, and download a single merged PDF.
Compress PDFMake a PDF smaller for email and upload limits by shrinking the photos and scanned pages inside it. Typed text, lines and fonts stay exactly as they are. Choose Light, Recommended or Strong, and if a PDF can't be made noticeably smaller, it's left as it was and not counted.
PDF to WordConvert a PDF to an editable Word document (.docx) with its paragraphs, headings, lists, tables and pictures. Scanned pages are read too, in 33 languages. Your PDF is deleted as soon as it's converted.
AstronomySee every eclipse, meteor shower and planet event of the coming year, the planets today, all 88 constellations and over 500 deep-sky objects. Worked out on your device for where you are.

Guides for this collection

More collections

All collections