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Data & Calculators: Functions & Curves

2 apps

PNG · CreateParametric Curve PlotterTurn two formulas into loops, spirals, Lissajous figures, and other paths controlled by t.PNG · CreateScientific Function PlotterType a math formula and explore its curve with zoom, hover values, and a clean downloadable graph.

Data & Calculators: Compare Data

4 apps

PNG · CreateBubble Chart MakerCompare x, y, and size at once, with labels and groups that make every bubble easy to inspect.PNG · CreateCSV Scatter Plot MakerPaste x and y values, colour points by group, and spot clusters, gaps, and unusual results.PNG · CreateError Bar Chart MakerPlot measured values with plus-or-minus error bars so uncertainty stays visible beside each result.PNG · CreateMulti-Series Line Chart MakerDraw one or more ordered lines from CSV data and compare how each series rises or falls.

Data & Calculators: Distributions

3 apps

PNG · CreateBox Plot MakerCompare medians, quartiles, ranges, and unusual points across one or more groups.PNG · CreateHistogram MakerGroup measurements into bins and see where values gather, spread out, or form more than one peak.PNG · CreateViolin Plot MakerShow the full density shape of grouped measurements while keeping the median and inner box visible.

Data & Calculators: Grids & Fields

3 apps

PNG · Analyze2D Density Contour Plot MakerEstimate where x and y observations gather and show their density as filled contour bands.PNG · CreateContour Plot MakerTurn gridded measurements into smooth contour bands that reveal peaks, valleys, and boundaries.PNG · CreateMatrix Heatmap MakerConvert row, column, and value data into a colour grid with hover values and a clear scale.

Data & Calculators: 3D Science

3 apps

PNG · Create3D Scatter Plot MakerPlot x, y, and z values in a rotatable space, then colour groups and inspect point labels.PNG · Create3D Surface Function PlotterType a two-variable formula and rotate a smooth 3D surface to inspect peaks, bowls, waves, and saddles.PNG · Create3D Vector Field MakerDraw vectors from x, y, z positions with u, v, w direction values in a rotatable cone field.

Data & Calculators: Special Coordinates

3 apps

PNG · CreatePolar Plot MakerTurn angle and radius values into circular traces for direction, cycles, and radial measurements.PNG · CreateRadar Chart MakerCompare several profiles across the same named categories with clear filled radar shapes.PNG · CreateTernary Plot MakerPlot three values that form a whole, such as material blends, soil mixes, or survey shares.

Data & Calculators: Finance & Change

2 apps

PNG · CreateCandlestick Chart MakerTurn dated OHLC values into an interactive candlestick chart with zoom and a range slider.PNG · CreateWaterfall Chart MakerShow how gains, losses, and totals move a starting value toward a final result.

Data & Calculators: Many Variables

3 apps

PNG · AnalyzeCorrelation Matrix HeatmapCalculate pair-by-pair correlations across numeric columns and see strong positive or negative links.PNG · AnalyzeParallel Coordinates Plot MakerTurn each numeric column into an axis and follow every row across a high-dimensional profile.PNG · AnalyzeScatter Plot Matrix MakerBuild a grid of scatter plots so every numeric column can be compared with every other column.

Data & Calculators: Math Calculators

44 apps

Data & Calculators: Financial Calculators

75 apps

Data & Calculators: Fitness & Health Calculators

31 apps

Data & Calculators: Other Calculators

52 apps

Data & Calculators: GeoJSON Basics

6 apps

GeoJSON · GenerateGeoJSON Bounding Box MakerFind the smallest west, south, east, and north box that holds your GeoJSON.GeoJSON · CalculateGeoJSON Center and Centroid FinderFind the centre of the outer box and the centre made from all shape points.GeoJSON · ConvertGeoJSON Coordinate CleanerRemove needless repeated points from lines and polygons without changing their visible shape.GeoJSON · ConvertGeoJSON Line to Polygon ConverterClose a GeoJSON line and turn it into a polygon feature.GeoJSON · ConvertGeoJSON Polygon to Line ConverterConvert polygon rings into GeoJSON lines while keeping the feature properties.GeoJSON · CheckGeoJSON ValidatorCheck whether GeoJSON is readable and whether each map shape follows the basic geometry rules.

Data & Calculators: Measure & Navigate

7 apps

GeoJSON · CalculateBearing and Midpoint CalculatorFind the compass bearing, distance, and halfway point between two map coordinates.GeoJSON · GenerateDestination Point MakerStart at one coordinate, travel a set distance and bearing, and get the destination point.GeoJSON · CalculateGeoJSON Area CalculatorMeasure a polygon in square metres, square kilometres, hectares, and acres.GeoJSON · CalculateGeoJSON Route Length CalculatorFind the full ground distance of a GeoJSON line in kilometres, miles, metres, or nautical miles.GeoJSON · GenerateGreat Circle Route MakerCreate a curved GeoJSON route that follows the shortest path across the globe between two points.GeoJSON · CalculateMap Point Distance CalculatorFind the earth distance between two longitude and latitude pairs.GeoJSON · CalculatePoint Along Route FinderPlace a point at an exact distance from the start of a GeoJSON route.

Data & Calculators: Select & Compare

7 apps

GeoJSON · CalculateGeoJSON Line Intersection FinderFind every point where two GeoJSON lines cross each other.GeoJSON · CheckGeoJSON Point Cluster AnalyzerGroup a point collection with K-means or DBSCAN and add a cluster number to every point.GeoJSON · CheckGeoJSON Polygon Overlap CheckerCheck whether two polygons touch or overlap, and draw the shared area when one exists.GeoJSON · CalculateNearest Map Point FinderCompare one target coordinate with a GeoJSON point list and find the closest point.GeoJSON · CalculateNearest Point on Route FinderFind the closest spot on a GeoJSON route to any longitude and latitude point.GeoJSON · CheckPoint in Polygon CheckerCheck whether a longitude and latitude point is inside a GeoJSON polygon.GeoJSON · CheckPoints in Polygon FilterKeep only the GeoJSON points that fall inside a polygon or multipolygon.

Data & Calculators: Shape & Transform

11 apps

GeoJSON · GenerateConvex Hull MakerDraw the smallest simple convex polygon that wraps around a set of points.GeoJSON · ConvertGeoJSON Bounding Box ClipperCut a line or polygon so only the part inside a bounding box remains.GeoJSON · GenerateGeoJSON Buffer MakerDraw a set-distance zone around a point, line, or polygon.GeoJSON · GenerateGeoJSON Line Offset MakerCreate a new line a set distance to one side of a GeoJSON route.GeoJSON · GenerateGeoJSON Polygon Difference MakerRemove the second polygon from the first and keep the area that remains.GeoJSON · GenerateGeoJSON Polygon Dissolve MakerMerge touching polygons that share the same group property and keep separate groups apart.GeoJSON · GenerateGeoJSON Polygon Intersection MakerCreate the map area that two polygons have in common.GeoJSON · GenerateGeoJSON Polygon Union MakerCombine two or more polygons into one polygon or multipolygon result.GeoJSON · CreateGeoJSON Rotate Scale and Move ToolRotate a map shape, scale it from its centre, and move it by distance and bearing.GeoJSON · GenerateGeoJSON Route Slice MakerCut out the part of a GeoJSON route between two distances from its start.GeoJSON · ConvertGeoJSON SimplifierRemove extra coordinates while keeping the main shape of a line or polygon.

Data & Calculators: Grids & Patterns

7 apps

GeoJSON · GenerateGeoJSON Circle Polygon MakerTurn a centre point and radius into a GeoJSON polygon that follows ground distance.GeoJSON · GenerateGeoJSON Sector Shape MakerCreate a pie-slice map polygon from a centre, radius, start bearing, and end bearing.GeoJSON · GenerateHexagon Map Grid MakerCreate a flat-top hexagon GeoJSON grid for sampling, planning, or map analysis.GeoJSON · GenerateMap Point Grid MakerCreate evenly spaced GeoJSON points inside a map bounding box.GeoJSON · GenerateRandom GeoJSON Point GeneratorCreate any number of random GeoJSON points inside a bounding box for tests and demos.GeoJSON · GenerateSquare Map Grid MakerCreate an even square GeoJSON grid inside any west, south, east, and north box.GeoJSON · GenerateVoronoi Map MakerSplit a map into cells so every place belongs to its nearest input point.

Data & Calculators: View & Inspect

1 app

CSV · ViewCSV ViewerOpen a CSV or TSV file as a clear table, search the rows, and check basic file details without uploading it.

Data & Calculators: Clean & Organize

4 apps

CSV · OptimizeCSV CleanerTrim extra spaces, remove empty rows and columns, and repair uneven CSV data in one private pass.CSV · OrganizeCSV Column PickerChoose, reorder, and export only the CSV columns you want while leaving the original file untouched.CSV · OrganizeCSV SorterSort a CSV by any column from A to Z, Z to A, smallest to largest, or largest to smallest.CSV · OptimizeRemove Duplicate CSV RowsFind repeated CSV rows by every column or the columns you choose, then keep one clear copy of each row.

Data & Calculators: Convert

3 apps

CSV · ConvertCSV Delimiter ConverterChange commas, tabs, semicolons, or pipes without breaking quoted text, commas inside cells, or line breaks.CSV · ConvertCSV to JSON ConverterConvert CSV or TSV rows into clean JSON objects, with each heading used as a clear field name.JSON · ConvertJSON to CSV ConverterConvert a JSON object or list of objects into a spreadsheet-ready CSV with one column for every field.

Data & Calculators: Combine & Split

2 apps

CSV · OrganizeMerge CSV FilesCombine CSV files into one table, match columns by heading, and leave a blank when a file is missing a value.CSV · OrganizeSplit CSVBreak one large CSV into smaller files with the same headings and the exact number of rows you choose.

Data & Calculators: Date Calculators

4 apps

Calculator · CalculateAge CalculatorFind an exact age in years, months, and days, plus the next birthday and useful age milestones.Calculator · CalculateBusiness-Day CalculatorCount workdays or add business days using your workweek and a custom holiday list.Calculator · CalculateDate Difference CalculatorMeasure the exact time between two moments in calendar units, hours, minutes, and seconds.Calculator · CalculateDays Between Dates CalculatorCount calendar days between two dates with clear start-day and end-day inclusion choices.

Data & Calculators: Everyday Math

2 apps

Calculator · CalculatePercentage CalculatorSolve percentage questions, changes, increases, and decreases with the formula shown in plain language.Converter · ConvertUnit ConverterConvert length, weight, temperature, area, volume, speed, time, data, energy, and pressure units.

Data & Calculators: Clocks & Timers

3 apps

Timer · CountCountdown TimerCount down a duration or a future date with quick presets, pause controls, and an optional finish sound.Timer · CountStopwatchTime anything with a precise stopwatch, lap splits, best and slowest laps, and keyboard controls.Clock · ViewWorld Clock & Meeting PlannerCompare live local times around the world and find a meeting time that lands on the right day.

Data & Calculators: Business Pricing

1 app

Calculator · CalculateMobile Massage Travel Fee CalculatorPrice mobile visits from true trip costs, an included radius, minimum fees, income goals, and groups, then copy a three-zone policy.

Data & Calculators: Business Calculators

2 apps

Calculator · CalculateMassage Room Rent vs Commission CalculatorCompare room rent and commission across working weeks, recovered no-show fees, full costs, hourly earnings, and client break-even.Calculator · CalculateNo-Show Cost, Deposit & Cancellation Window CalculatorCalculate revenue and time lost to no-shows, then optimize a practical deposit, cancellation window, and the net ROI of reminders or a waitlist.

Data & Calculators: Averages & Centers

10 apps

Data & Calculators: Counting & Sampling

8 apps

Numbers · GenerateBootstrap Resample MakerMake a repeatable sample where the same source value can be picked more than once.Numbers · GenerateNumber Combination List MakerList every group of a chosen size where order does not matter.Numbers · GenerateNumber List Chunk MakerKeep the original order while breaking a number list into equal-size chunks.Numbers · GenerateNumber Permutation List MakerMake every ordering of a short number list.Numbers · GenerateRepeatable Number List ShufflerShuffle all values with a repeatable seed.Numbers · GenerateRepeatable Random Sample PickerChoose a repeatable random sample where each list item can be picked once.Numbers · GenerateReplacement Combination List MakerList every unordered group while allowing a value to appear more than once.Numbers · CalculateWhole Number Factorial CalculatorFind n! for a non-negative whole number up to 170.

Data & Calculators: Groups & Breaks

7 apps

Numbers · GenerateCkmeans Number Group MakerGroup a sorted number list so values inside each group stay close together.Numbers · CalculateCluster Silhouette Score CheckerGroup points with k-means, then score how well each point fits its group.Numbers · GenerateEqual Interval Breaks MakerMake evenly spaced class breaks from the smallest value to the largest.Numbers · GenerateJenks Natural Breaks MakerPlace break points where the number list has useful gaps.Numbers · GenerateK-Means Point Group MakerGroup two- or three-part points around nearby centers.Numbers · GenerateKernel Density Estimate MakerEstimate how tightly values gather around points across the list range.Numbers · GenerateNumber Frequency Table MakerSort a number list and count how often every value appears.

Data & Calculators: Percentiles & Outliers

7 apps

Numbers · CalculateFive Number Summary MakerFind the minimum, first quartile, median, third quartile, and maximum.Numbers · CalculateIQR Number List Outlier FinderUse the 1.5 × IQR rule to flag unusually low or high values.Numbers · CalculateMAD Number List Outlier FinderUse the median absolute deviation to find values far from the center.Numbers · CalculateMedian Absolute Deviation FinderFind the median distance from the list median, with less pull from extreme values.Numbers · CalculateNumber List Interquartile RangeFind the distance between the first and third quartiles.Numbers · CalculateNumber List Percentile Rank FinderFind the share of a list that is at or below a chosen value.Numbers · CalculatePopulation Quantile FinderFind the value at any population quantile from 0 to 1.

Data & Calculators: Probability Distributions

11 apps

Numbers · GenerateBernoulli Probability Table MakerShow the chance of failure and success for one trial.Numbers · GenerateBinomial Probability Table MakerMake the probability for every success count in repeated yes-or-no trials.Numbers · CalculateGamma Function CalculatorCalculate the gamma function for a positive number.Numbers · CalculateGaussian Error Function CalculatorFind the Gaussian error function for a chosen finite number.Numbers · CalculateInverse Error Function CalculatorFind the value whose Gaussian error function equals your input.Numbers · CalculateLog Gamma Function CalculatorFind the natural logarithm of the gamma function for a positive number.Numbers · GeneratePoisson Probability Table MakerMake a probability table for event counts around an average rate.Numbers · CalculateProbability Log-Odds CalculatorConvert a probability between 0 and 1 into its log-odds value.Numbers · CalculateStandard Logistic Cumulative ProbabilityFind the standard logistic probability at or below a chosen score.Numbers · CalculateStandard Normal Cumulative ProbabilityFind the standard normal probability at or below a chosen z-score.Numbers · CalculateStandard Normal Probit FinderFind the z-score with a chosen share of the standard normal curve to its left.

Data & Calculators: Relationships & Trends

7 apps

Numbers · CalculateLinear Regression R-Squared CheckerFit a straight line and show the share of y variation explained by it.Numbers · CalculateLinear Regression Residual ReportCompare each observed y value with the straight line’s estimate.Numbers · CalculateLinear Regression Value PredictorFit paired values, then use the line to estimate y at a chosen x.Numbers · CalculateNumber List Linear Regression LineFit a straight line through paired x and y values and show its slope and start.Numbers · GeneratePaired Sample Covariance FinderMeasure whether two paired samples tend to move in the same direction.Numbers · CalculatePearson Number Correlation FinderSee how strongly two paired number lists move together in a straight pattern.Numbers · CalculateSpearman Rank Correlation FinderMeasure whether paired values rise and fall in a similar rank order.

Data & Calculators: Reports & Data

2 apps

PNG · AnalyzePivot Table ExplorerOpen a CSV, choose rows, columns, and a value to total, and explore a pivot table without a spreadsheet app.PNG · AnalyzeSurvey Results AnalyzerOpen a survey CSV. See a chart for every question, an NPS score, and the mood of written comments.

Data & Calculators: Spread & Shape

6 apps

Numbers · CalculateCoefficient of Variation FinderShow standard deviation as a share of the mean.Numbers · CalculatePower Deviation Sum FinderFind the sum of each value’s distance from the mean raised to a chosen power.Numbers · GenerateSample Kurtosis FinderMeasure the excess kurtosis of a sample number list.Numbers · GenerateSample Skewness FinderMeasure whether a sample has a longer tail on the left or right.Numbers · CalculateSingle Value Z-Score FinderSee how many standard deviations one value sits above or below a list mean.Numbers · GenerateZ-Score List StandardizerTurn every value into its number of standard deviations from the mean.

Data & Calculators: Summary Updates

5 apps

Numbers · CalculateActual vs Expected Relative ErrorShow the absolute error as a share of the expected value.Numbers · CalculateAdd Value to Known MeanUpdate a known mean after one new value is added.Numbers · CalculateRemove Value from Known MeanUpdate a known mean after one value is removed from a list.Numbers · CalculateTwo-Group Combined MeanFind one mean from two group means and their group sizes, without the raw lists.Numbers · CalculateTwo-Group Combined VarianceFind one population variance from two group means, variances, and sizes.

Data & Calculators: Tests & Evidence

5 apps

Numbers · GenerateOne-Sample T-Score CalculatorCalculate the t statistic for a sample against an expected mean.Numbers · TestPoisson Chi-Square Fit CheckerTest whether a large list of non-negative event counts departs from a fitted Poisson distribution.Numbers · TestTwo-Group Permutation P-ValueEstimate a p-value by repeatedly reshuffling two groups with a repeatable seed.Numbers · GenerateTwo-Sample T-Score CalculatorCalculate a t statistic for the difference between two independent samples.Numbers · TestWilcoxon Rank Sum ScoreAdd the ranks of the first sample after both samples are sorted together.

Data & Calculators: Weighted Statistics

4 apps

Numbers · CalculateWeighted Number List MeanFind an average where each value has its own weight.Numbers · CalculateWeighted Number List QuantileFind a quantile while letting some values count more than others.Numbers · CalculateWeighted Number List Standard DeviationFind weighted standard deviation for values with different importance.Numbers · CalculateWeighted Number List VarianceFind the variance of values that have different weights.