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Education & Research Tools
Fifteen tools for students and researchers: plan study and revision, make flashcards and quizzes from your notes, format and de-duplicate references, look up DOIs, choose a statistical test and size a study.
About these tools
The study tools turn your own material into structure - timetables, revision plans, flashcards, quizzes and outlines - by documented rules, not by generating text for you. The research tools cover the parts of a project that are easy to get wrong under deadline: reference formatting, duplicate records across databases, framing the question, and choosing a test and a sample size you can defend.
Everything except the DOI lookup runs in your browser. The DOI lookup sends only the identifier to the public Crossref or DataCite API and shows exactly what came back. The statistics calculators state their formulas and assumptions, and none of them can tell you whether your study design is right - that remains a judgement for you and your supervisor.
Popular tasks
All Education & Research Tools
- Study Timetable Planner Build a weekly study timetable from your subjects, their priority and difficulty, and the hours you are actually free, with breaks, balanced rotation and a printable or calendar-file result.
- Exam Revision Planner Plan revision backwards from your exam dates: topics per exam, confidence ratings, spaced review sessions, rest days and a daily checklist that shows whether the plan fits the time left.
- Flashcard Maker Make flashcards from pasted term-definition pairs or CSV, study them with a Leitner spaced-repetition box, print cut-out cards, and export to CSV or Anki-compatible text - all in your browser.
- Quiz Generator from Text Turn your own notes into a practice quiz: fill-in-the-blank, multiple-choice and true/false questions built by transparent rules from key terms in your text, with an answer key and print view.
- Citation Formatter Format references in APA 7, MLA 9, Chicago author-date, Harvard and IEEE from fields or BibTeX/RIS, with name inversion, et al. rules, sorting and copy-ready HTML or plain text.
- DOI Metadata Lookup Look up a DOI's public metadata - title, authors, journal, dates, licence and funders - from Crossref or DataCite, and export it as BibTeX, RIS or a formatted reference.
- Bibliography Deduplicator Find duplicate references in BibTeX or RIS exports by DOI, normalised title, year and first author, review each cluster, choose the record to keep, and export a clean library.
- Literature Review Matrix Builder Build a literature review synthesis matrix: sources as rows, your themes, methods, samples and findings as columns, with tagging, filtering, theme coverage counts and CSV or print export.
- Research Question Builder Frame a research question with PICO, PICOT, PEO or SPIDER: guided fields, assembled question variants, a FINER checklist and search-string terms for each element.
- Hypothesis Test Selector Answer a few questions about your outcome, groups, pairing and assumptions to find a suitable statistical test - t-test, ANOVA, chi-square, Mann-Whitney and more - with the reasoning and assumptions to check.
- Statistical Power Calculator Run a power analysis for t-tests, two proportions, correlation and one-way ANOVA: solve for sample size, power or detectable effect size, with Cohen's conventions and a power curve.
- Research Sample Size Calculator Calculate the sample size a survey or study needs to estimate a proportion or a mean, with confidence level, margin of error, finite population correction and the invitations needed at your expected response rate.
- Readability Score Analyzer Score text with six readability formulas - Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau and ARI - see the counts behind each, and find the sentences dragging the score.
- Academic Reading Time Calculator Estimate how long a reading list will take by pages or word count, text difficulty and purpose - skim, understand or study closely - and spread it across the days you have.
- Lecture Notes Outline Builder Turn raw lecture notes or a transcript into a structured outline or Cornell-style notes: detected headings, numbered points, key terms and a summary box you complete, exported as Markdown, DOCX-ready text or print.
- Average Calculator Paste a list of numbers and get the mean, median, mode, range and a weighted average if you give weights, with the working shown step by step so you can check the arithmetic or copy it into homework.
- Area Calculator Calculate the area of common shapes - square, rectangle, triangle, circle, ellipse, trapezoid, parallelogram, sector and regular polygon - in any unit, with the formula, the substituted values and conversions to other units.
- Angle Converter Convert angles between degrees, radians, gradians, turns, arc minutes and degrees-minutes-seconds, see radians as a multiple of pi, and get the sine, cosine and tangent of the angle in one place.
- Arithmetic Sequence Calculator Find the nth term, the sum of the first n terms and the common difference of an arithmetic sequence, solve for any missing value, and list the terms - with geometric sequences supported on the same page.
- Antilog and Logarithm Calculator Calculate logarithms and antilogarithms in base 10, base e or any base you choose, with the characteristic and mantissa shown the way log tables present them, and the change-of-base working spelled out.
- Acceleration Calculator Calculate acceleration from a change in velocity over time, from distance and time, or from force and mass, solve for any one missing value, and convert between m/s², g, ft/s² and 0-100 km/h times.
- Z-Test Calculator Run a z-test for one mean, two means, one proportion or two proportions: the z statistic, one- or two-tailed p-value, the critical value at your significance level and a plain-language decision, with every step shown.
- Z-Score to Percentile and P-Value Calculator Convert a z-score to a percentile and a one- or two-tailed p-value, go the other way from a percentile to z, find the area between two z-scores, and read a full standard normal table with the shaded region drawn.
- Molar Mass Calculator Type a chemical formula such as H2SO4, Ca(OH)2 or CuSO4·5H2O and get its molar mass with an element-by-element breakdown, mass percentages, and grams-to-moles conversion, from the IUPAC standard atomic weights.
- Multiplication Table Generator Generate multiplication tables for any number or range, a full times-table grid up to 20 by 20, and practice sheets with or without answers, ready to print for school or to drill online with instant checking.
- Matrix Calculator Add, subtract and multiply matrices, find the determinant, inverse, transpose, rank and reduced row echelon form, and solve linear systems, with exact fractions where possible and the row operations shown.
- Midpoint Calculator Find the midpoint between two points in 2D or 3D, the distance between them, the slope and the line equation, or the halfway value between two numbers, with the formula and a small plotted graph.
- Marks Percentage Calculator Turn exam marks into a percentage for one paper or every subject: total and per-subject percentages, best-of-five, grade and division, and CGPA-to-percentage, with the board convention you choose stated.
- Modulo Calculator Calculate a mod n with the quotient and remainder, the difference between the truncated and floored conventions for negative numbers, modular exponentiation for very large values, and the modular inverse.
- Density Calculator Solve density, mass or volume from the other two in any units, compare the result with common materials and liquids, and get specific gravity and whether it would float in water, with the working shown.
- Decimal to Fraction Converter Convert a decimal - including repeating decimals such as 0.333... or 0.1(6) - to its simplest fraction and mixed number, convert fractions back to decimals and percentages, and see the working and the nearest inch fraction.
- Scientific Calculator A full scientific calculator in the browser: trigonometry in degrees or radians, logs, powers and roots, factorials, constants, memory and history, with keyboard input and the expression evaluated by a safe parser you can read.
- Standard Deviation Calculator Calculate the sample and population standard deviation and variance of a data set, with the mean, the squared deviations table, the coefficient of variation and standard error, laid out step by step for checking.
- Speed Distance Time Calculator Solve speed, distance or time from the other two in any units - km/h, mph, m/s, knots - with average speed over several legs, the formula triangle, and the working laid out for physics homework and trip planning.
- Slope Calculator Find the slope of a line through two points, the equation in slope-intercept and point-slope form, and the same gradient as rise over run, percent grade and angle - useful for maths homework, ramps, roads and roofs.
- Scientific Notation Converter Convert numbers to and from scientific notation, engineering notation and E notation, and add, subtract, multiply and divide numbers written in standard form, with significant figures kept and the working shown.
- Square Root Calculator Find the square root of any number, simplify radicals such as √72 = 6√2, tell whether a number is a perfect square, and see the digit-by-digit long-division method and the nearest perfect squares either side.
- Significant Figures Calculator Count the significant figures in a number with each digit marked and the rule that applies, round to any number of sig figs, and add, subtract, multiply or divide while keeping the right precision in the answer.
- Surface Area Calculator Calculate the total and lateral surface area and the volume of 3D shapes - cube, cuboid, cylinder, sphere, hemisphere, cone, prism and pyramid - in any unit, with the formula and substituted values for each result.
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