Free Apps and ToolsNo Catch, No Subscription
New additions for files, fonts, code, audio, and data. Explore 394 new tools
Browse calculators by topic Finance, everyday life, construction, conversions, and more.
3623 apps · Showing 3265–3360
Learning & Reference
313 appsLearning & Reference: Countries & Cultures
Quiz · CheckCountry Calling Code Finder for KidsType the digits after a plus sign and see which countries use that calling code.Quiz · CheckCountry Facts Explorer for KidsSee a country's flag, capital, continent, languages, money, and calling code.Quiz · CheckWorld Currencies Explorer for KidsPick a currency and see its name, symbol, code, and places that use it.Quiz · CheckWorld Languages Explorer for KidsPick a language, read its local name, and see countries where it is listed.
Learning & Reference: Creative Coding
Art · GenerateTurtle Code Drawing PlaygroundGive a turtle a few simple commands and watch it draw a bright picture one line at a time.Art · GenerateTurtle Coordinate Path BuilderSend the turtle to x and y points and see those coordinates join into a clear path.Art · GenerateTurtle Polygon MakerChoose the number of sides and see how forward steps and equal turns make a polygon.
Learning & Reference: Daylight Tables
Coordinates · CalculateDaylight Comparison ToolCompare daylight length, sunrise, and sunset between two dates at the same location.Coordinates · CalculateMonthly Daylight TableBuild a full month of sunrise, sunset, twilight windows and daylight durations for one place.Coordinates · CalculateWeekly Daylight TableBuild a seven-day sunrise, sunset, and daylight table from one starting date.
Learning & Reference: Ear Training
Learning & Reference: Feelings & Friendship
Learning & Reference: Fraction Tools
Learning & Reference: Geometry Tools
Number · CheckAngle Sketch Lab for KidsDraw and move two rays to explore acute, right, and obtuse angles on a large grid.Number · CheckCoordinate Plane Drawing Tool for KidsUse four quadrants to make a point picture, mark coordinates, or plan a route across a grid.LaTeX · GenerateGeometry Construction Animator for KidsWatch a triangle, hexagon, or set of angles grow from clear construction lines.Number · CheckGeometry Construction Board for KidsMake a shape house, matching halves, or a repeating pattern on a clear square grid.
Learning & Reference: Grammar & Words
Learning & Reference: History Learning
Learning & Reference: Language & Calendars
Text · ConvertBraille Byte DecoderDecode text from eight-dot braille byte patterns. Restore text made with a matching byte encoder; this is not a braille translator.Unicode braille · ConvertBraille Byte EncoderEncode text bytes as eight-dot Unicode braille patterns. This reversible code is not a translation into readable braille.Unicode · ConvertBraille Dot Cell ExplorerExplore the eight dots of a Unicode braille cell. Choose raised dots and see the matching character and byte value.BS / CSV · ConvertNepali Calendar MakerMake a month of Nepali BS dates with corresponding Gregorian dates and weekdays.AD / BS · ConvertNepali Date ConverterConvert a calendar date between Gregorian AD and Nepali Bikram Sambat BS, with English and Nepali output.Text · ConvertPhonetic Spelling HelperSpell names, reference numbers, and short messages with the NATO phonetic alphabet.Text · ConvertRadio Spelling PracticePractise NATO phonetic code words with a scored quiz, immediate feedback, and downloadable results.
Learning & Reference: Language & Words
Learning & Reference: Learn to Code
Learning & Reference: Learning Quests
Text · CheckChore Level-Up Chart for KidsCheck off a few useful home jobs, add your own chore, and watch a simple hero level grow.Text · CheckClassroom Team Quest Board for KidsTrack shared jobs for taking turns, hearing every voice, finishing a goal, and cleaning the team space.Text · CheckConfidence Shield Builder for KidsBuild a short reminder from a strength, helpful thought, next move, and shield symbol.Text · CheckDaily Kindness Quest for KidsPick a safe, free kindness idea for an ordinary day and celebrate when the small quest is done.Text · CheckHealthy Habit Hero for KidsTrack water, enjoyable movement, helpful food, and sleep preparation without chasing perfection.Text · CheckHomework Quest Board for KidsBreak homework into clear missions, finish one step at a time, and build a simple experience bar.Number · CheckMath Monster Battle for KidsSolve addition, subtraction, multiplication, division, and halving puzzles to fill a victory bar.Text · CheckReading Adventure Timer for KidsChoose a five, ten, fifteen, or twenty minute reading quest and track one calm session.Word data · CheckSpelling Spellbook Quest for KidsRead a friendly clue, type the hidden word, and use a sound-part hint when you need help.Text · CheckStudy Potion Focus Timer for KidsChoose a short focus quest, use the big timer, and mark the session done when it is time to rest.Word data · CheckVocabulary Treasure Hunt for KidsFind six word treasures by choosing the word that fits each clear, fifth-grade-friendly meaning.
Learning & Reference: Letters & Numbers
Learning & Reference: Light & Twilight
Coordinates · CalculateAstronomical Darkness PlannerFind when astronomical night starts, ends, and reaches its darkest point.Coordinates · CalculateBlue Hour CalculatorEstimate morning and evening blue hour using the sun's minus 8 to minus 4 degree range.Coordinates · CalculateCivil Twilight PlannerFind the morning and evening civil-twilight windows around sunrise and sunset.Coordinates · CalculateDaylight Length CalculatorCalculate daylight, night length, sunrise, and sunset for a date and place.Coordinates · CalculateNautical Twilight PlannerFind when nautical twilight begins and ends before dawn and after dusk.Coordinates · CalculateTwilight Times CalculatorList astronomical, nautical, civil, sunrise, sunset, and night times in order.
Learning & Reference: Maps & Directions
Learning & Reference: Maps & Geography
Quiz · CheckContinent Coloring Map MakerChoose a continent, color every country shape in it, and print the map.Quiz · CheckCountry Size Comparer for KidsPut two country outlines side by side and see which map shape takes up more space.Quiz · CheckWorld Map Explorer for KidsPick a country, see it light up on the map, and learn its capital and languages.
Learning & Reference: Math & Dot Art
Art · GenerateBinary Dot Picture MakerSee how rows of zeros and ones can switch dots off and on to draw a tiny picture.Art · GenerateDot Coordinate Grid ExplorerMove around a 16 by 16 dot grid and see the x, y, and index number for every spot.Art · GenerateTimes Table Dot Art MakerPick a times table and watch its products light up as a colorful dot pattern.
Learning & Reference: Math & Science
Report / CSV · ConvertAC Impedance Teaching LabExplore how resistors, coils and capacitors affect an AC circuit. Compare series and parallel circuits at a chosen frequency.Worksheet JSON · ConvertCalculus Expression HelperFind a derivative or integral of a supported expression. Compare the formulas and check the result at a chosen value.JSON / SVG · ConvertComplex Number WorkbenchCalculate with complex numbers such as 3 + 4i. See the answer on a graph and compare its distance and angle.CSV / SVG · ConvertDescriptive Statistics DeskSummarize number columns in a CSV file. See averages, ranges, missing values and a chart of how the values are spread.Report / CSV · ConvertFraction Worksheet CheckerCheck fraction sums and answers. See common-denominator steps and simplified fractions for each line of your worksheet.JSON · ConvertLinear Systems WorkbenchSolve a system of linear equations in the form Ax = b. See the solution and how closely it fits each equation.JSON · ConvertMatrix LaboratoryMultiply, transpose or invert matrices. Check their size and see warnings when a calculation may be unstable.Worksheet JSON · ConvertPolynomial Exploration DeskExpand and factor polynomials. Find a derivative and calculate the value of an expression at a point you choose.JSON · ConvertPrecision Decimal CalculatorCalculate with long decimal numbers. Choose the precision and compare the answer with a standard computer calculation.JSON / SVG · ConvertProbability Distribution ExplorerExplore probability distributions with charts. Change the settings and see how the curve and chances change.Report / CSV · ConvertRecipe Fraction ScalerScale a recipe up or down with exact fractions. Keep each ingredient and unit beside its new amount.Report / CSV · ConvertRounding Method DemonstratorCompare nine ways to round numbers. See what happens with negative numbers and values exactly halfway between two choices.Notebook JSON · ConvertScientific Calculator NotebookSolve calculations in a reusable notebook. Name values, use units and matrices, and use earlier answers in later lines.Report / CSV · ConvertStatistical Test WorkbenchRun a t-test to compare averages. Choose one sample, paired measurements or two groups, then review the results and assumptions.Worksheet JSON · ConvertSymbolic Algebra WorkbenchSimplify, expand or factor an algebra expression. Compare the new form with the original and check a sample value.Worksheet JSON · ConvertSymbolic Computation WorksheetWork through several algebra or calculus steps in order. Review each result and download the full worksheet.JSON / SVG · ConvertTangent-line VisualizerDraw a function and its tangent line. Move a point along the curve to see how the slope and line equation change.Formula JSON · ConvertUnit-aware Formula CalculatorMake a formula with named inputs and units. Change the measurements, calculate again and save the formula for later.
Learning & Reference: Minecraft Learning
Quiz · CheckMinecraft Biome Explorer for KidsPick a biome and learn its climate, temperature, precipitation, category, and dimension.Quiz · CheckMinecraft Block Facts Explorer for KidsPick a block and see its hardness, light, stack size, transparency, and best tool.Quiz · CheckMinecraft Block Hardness ComparerPut two blocks side by side and see which one is easier or harder to break.Quiz · CheckMinecraft Crafting Recipe Helper for KidsChoose a familiar item and see the ingredients in a clear three-by-three crafting grid.Quiz · CheckMinecraft Enchantment Explorer for KidsChoose an enchantment and see its highest level, item group, treasure flag, and trade flag.Quiz · CheckMinecraft Food Points Explorer for KidsPick a food and see how many food points it gives and how many fit in one stack.Quiz · CheckMinecraft Light Level Explorer for KidsSee how much block light comes from a torch, lantern, glowstone, and other bright blocks.Quiz · CheckMinecraft Mob Size Comparer for KidsChoose two mobs and compare their data-sized shapes from a tiny bee to a tall Enderman.Number · CheckMinecraft Stack Calculator for KidsTurn any item count into full stacks, extra items, and the number of inventory slots needed.
Learning & Reference: Moon Planning
Coordinates · CalculateMoon Photography PlannerCombine moon position, rise and set times, lit percentage, and phase for one shot time.Coordinates · CalculateMoon Position CalculatorCalculate moon altitude, compass direction, distance, and parallactic angle at one time.Coordinates · CalculateMoonrise & Moonset CalculatorCalculate local moonrise, moonset, and all-day horizon status for a place and date.Coordinates · CalculateSun & Moon Daily TimelineCreate one ordered local timeline for dawn, sun, twilight, moonrise, and moonset.
Learning & Reference: Museums & Art
Art · GenerateArt History Time Traveler for KidsSlide from ancient Egypt to the 1900s and uncover one museum object at a time.Art · GenerateArt Materials Explorer for KidsCompare paint, metal, clay, jade, wood, cloth, feathers, and other art materials.Art · GenerateMet Museum Object Explorer for KidsMeet cats, dragons, masks, paintings, toys, and more from the Met collection.
Learning & Reference: Painting & Drawing
Learning & Reference: Piano Practice
Audio · GenerateFind Middle C Piano Practice for KidsPractice finding middle C on a wide piano without a printed answer on the key.Audio · GenerateLearn-a-Melody Piano Trainer for KidsFollow clear note clues on a real touch piano until you can play the whole tune.Audio · GenerateLeft and Right Hand Piano Practice for KidsFollow simple hand clues while low and high piano notes take turns.