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Grades, study timers and number helpers - 18 working tools
GPA Calculator
Weighted GPA from course grades and credit hours.
Marks & Percentage Calculator
Percentage and letter grade from obtained and total marks.
Multiplication Table
Print a times table for any number.
Roman Numeral Converter
Convert numbers 1-3999 to Roman numerals and back.
Number to Words
Write a whole number in English words (international or lakh/crore).
Pomodoro Timer
Focus and break cycles with a visible countdown.
Math Equation Solver
Solve an equation in one unknown (linear, quadratic, polynomial or numeric) or evaluate an expression, with the steps shown. Uses its own parser - nothing is sent anywhere.
Scientific Calculator
Scientific calculator with trig, logs, powers, factorials, memory and history. Type or tap; evaluated by its own parser (no eval).
Fraction Calculator
Add, subtract, multiply, divide or raise fractions and mixed numbers - exact results, simplified, as a mixed number and decimal, with steps.
Statistics Calculator
Mean, median, mode, quartiles, standard deviation, variance, outliers, skewness and more for a list of numbers.
Probability Calculator
Probability of one or two events (independent, mutually exclusive or with a known overlap), binomial probabilities, and combinations / permutations.
Weighted Grade Calculator
Weighted average of your marks, plus the score you need on the final exam to reach a target grade.
Citation Generator
Format a book, journal article or web page in APA 7, MLA 9, Chicago (author-date) or Harvard, with the in-text citation. Check against your style guide.
Bibliography Formatter
Sort, de-duplicate, number and indent a reference list - or paste BibTeX entries and format them as APA, MLA, Chicago or Harvard.
Typing Speed Test
Measure your typing speed in words per minute and your accuracy on short passages or your own text. Timed (30/60/120 s) or until you finish.
Spelling Practice
Practise your own word list: hear each word spoken by your device (or see it briefly), type it, and review the words you missed.
Flashcard Maker
Create flashcards, study them with flip, shuffle and "again" re-queue, import/export CSV, and print a card sheet. Cards are saved only in this browser.
Quiz Generator
Turn your own "question | answer" list into a multiple-choice quiz (wrong options come from your other answers), take it on screen, or print it with an answer key.