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3633 apps · Showing 2401–2496

Data & Calculators: Probability Distributions

Standard Normal Probit Finder

Find the z-score with a chosen share of the standard normal curve to its left.

Data & Calculators: Relationships & Trends

Linear Regression R-Squared Checker

Fit a straight line and show the share of y variation explained by it.

Linear Regression Residual Report

Compare each observed y value with the straight line’s estimate.

Linear Regression Value Predictor

Fit paired values, then use the line to estimate y at a chosen x.

Number List Linear Regression Line

Fit a straight line through paired x and y values and show its slope and start.

Paired Sample Covariance Finder

Measure whether two paired samples tend to move in the same direction.

Pearson Number Correlation Finder

See how strongly two paired number lists move together in a straight pattern.

Spearman Rank Correlation Finder

Measure whether paired values rise and fall in a similar rank order.

Data & Calculators: Reports & Data

Pivot Table Explorer

Open a CSV, choose rows, columns, and a value to total, and explore a pivot table without a spreadsheet app.

Survey Results Analyzer

Open a survey CSV. See a chart for every question, an NPS score, and the mood of written comments.

Data & Calculators: Scientific Data

Graph Algorithm Workbench

Explore a network's connections and groups. Count links and find the path with the fewest steps between two nodes.

Signal Filter Designer

Design a digital Butterworth filter. Choose frequencies to keep or reduce, preview its response and download the filter settings.

Time-Series Resampler

Group timestamped CSV measurements by hour, day, week or month. Choose how to summarize the values and download the result.

Data & Calculators: Scientific File Services

Chemical File Converter

Convert chemical structures between SDF, MOL and SMILES. Preview molecules, check errors and download the converted files.

GeoTIFF Inspector

Look inside a GeoTIFF map image. See its image bands, map coordinates and sample values, with an adjustable preview.

Raster Crop Service

Crop a GeoTIFF to a rectangle or polygon. Keep the map's coordinate grid and download the cropped image.

Data & Calculators: Sports Calculators

Baseball On-Base Rate from Batting Totals

Calculate OBP from hits, walks, hit-by-pitches, at-bats and sacrifice flies, with valid zero counts and reversible relationships.

Baseball Slugging: Total Bases per At-Bat

Compute slugging from singles, doubles, triples, home runs and at-bats, including no-hit records and the four-base maximum.

Basketball True Shooting from Points & Attempts

Calculate true shooting percentage using the conventional 0.44 free-throw weighting, including zero free-throw attempts and values above 100%.

Cricket Batting Strike Rate per 100 Balls

Calculate batting strike rate from runs and balls faced, including zero-run innings and selectable format commentary.

Cricket Bowling Average: Runs per Wicket

Calculate bowling average from runs conceded and wickets credited, including zero-run performances and reversible totals.

E-Bike Battery Range at Three Consumption Rates

Estimate battery-only range from watt-hour capacity using explicit 14, 20 or 26 Wh-per-mile consumption assumptions.

ERA from Whole Innings and Extra Outs

Calculate earned-run average with separate whole innings and extra outs, plus an adjustable game length for nine- or seven-inning normalization.

Fielding Percentage from Putouts, Assists & Errors

Calculate the fielding fraction from recorded putouts, assists and errors, with reversible inputs and a guard against zero chances.

Fishing Reel Line Length by Diameter Ratio

Estimate reel line capacity after a diameter change using equal line volume, with reversible length and diameter conversions.

Goalkeeper Save Percentage & Decimal Index

Calculate the share of shots on goal saved, displaying both a percentage and decimal index with consistent count validation.

Goalkeeper Save Rates & Goals Against Average

Calculate individual and aggregate save rates as percentages or decimal indices, plus time-adjusted goals against average, including zero saves and shutouts.

Goals Against Average per Regulation Game

Scale total goals allowed by minutes played to a chosen regulation-game length, including shutouts and partial games.

Race Finish-Time Percentage Reduction Targets

Turn a current race time into 1–10% reduction targets and a custom percentage target, preserving hours, minutes and seconds.

Running Race-Time Estimate with a 1.06 Exponent

Project a race time from a known distance and finish time using the explicit distance-ratio power model, with selectable distance and duration units.

Team Winning Percentage with Adjustable Tie Credit

Calculate a team’s winning percentage from wins, losses and ties, with explicit tie credit and reversible game totals.

Wingspan-to-Height Ratio & Reach Difference

Compare measured wingspan with height as both a unitless ratio and a signed length difference, using mixed measurement units.

Data & Calculators: Spread & Shape

Coefficient of Variation Finder

Show standard deviation as a share of the mean.

Power Deviation Sum Finder

Find the sum of each value’s distance from the mean raised to a chosen power.

Sample Kurtosis Finder

Measure the excess kurtosis of a sample number list.

Sample Skewness Finder

Measure whether a sample has a longer tail on the left or right.

Single Value Z-Score Finder

See how many standard deviations one value sits above or below a list mean.

Z-Score List Standardizer

Turn every value into its number of standard deviations from the mean.

Data & Calculators: Statistics Calculators

Absolute & Relative Error from a Reference Value

Measure the magnitude of a value’s deviation from a nonzero reference, including negative reference values.

Absolute & Relative Uncertainty Conversion

Convert an uncertainty magnitude to a relative percentage, or convert a percentage to uncertainty in the measurement’s units.

Bayes’ Rule for Consistent Event Probabilities

Calculate a conditional probability from two event probabilities and the reverse conditional, with checks for a feasible joint distribution.

Bonferroni & Šidák Per-Test Significance Thresholds

Convert a chosen family-wide significance level to a per-test threshold using Bonferroni or Šidák.

Compare Combination Counts with and without Replacement

Compare unordered selection counts with and without reuse of each object type, with a selectable small-example list.

Compare Ordered & Unordered Selection Counts

Compare permutation counts with and without replacement, optionally show combination counts, and select a small-example list.

Degrees of Freedom for t, Chi-Square, ANOVA & Welch

Calculate degrees of freedom for one-sample, pooled two-sample, Welch, contingency-table and one-way ANOVA designs.

Direct Proportion Constant & Values

Find the constant k in y = kx, or recover a compatible value for a relationship through the origin.

Exponential Waiting-Time Probabilities & Moments

Calculate exponential survival and cumulative probabilities, mean, median, variance and standard deviation from a constant event rate.

False-Positive Rate & Population Shares

Separate a classifier’s false-positive rate from false-positive and true-negative shares of the whole population.

Five-Star Rating from Vote Counts

Calculate a one-to-five-star arithmetic average from the number of ratings at each level.

Geometric Distribution: Failures Before First Success

Find the probability of exactly k failures before the first success, with the mean and spread of the failure count.

Mean ± Sigma: Upper & Lower Control Limits

Calculate symmetric limits around a supplied mean using a nonnegative standard deviation and sigma multiplier.

One-Sample t Statistic from Summary Data

Calculate a one-sample t statistic from a sample mean, hypothesized mean, sample standard deviation and sample size.

Ordered Selections without Replacement: Count & List

Count ordered arrangements of r distinct objects chosen from n and list complete small examples.

Ordered Sequences with Replacement: Count & List

Count ordered length-r sequences from n reusable types and enumerate supported small examples.

Pearson Chi-Square: One Cell’s Contribution

Calculate one observed-versus-expected count’s contribution to a Pearson chi-square statistic, with explicit inverse branches.

Probability-Weighted Loss Comparison

Compare the expected monetary loss of two events from each event’s probability and loss amount.

Process Capability: Cp, Cpk, Cpm & Target Adjustment

Calculate specification-width, centering and target-adjusted capability indices from a supplied process mean and positive standard deviation.

Raw Score & Z-Score Standardization

Convert between a raw value and its signed standard-deviation distance from a supplied mean.

Relative Standard Deviation Using Absolute Mean

Express a nonnegative standard deviation as a percentage of the magnitude of a nonzero mean.

Relative Standard Error as a Percentage of the Mean

Compare a supplied standard error with the magnitude of a nonzero mean, retaining a nonnegative relative percentage.

Sample Proportion from Successes & Trials

Calculate the observed success fraction p-hat from counts, or recover a compatible whole-number count.

Sample-Mean Expectation & Standard Error

Find the expected sample mean and its standard error for independent observations with a common finite mean and variance.

Standard Deviation Index Against a Consensus Mean

Express the difference between a laboratory mean and a consensus mean in units of the consensus-group standard deviation.

Standard Error of the Mean from SD & Sample Size

Calculate the standard deviation of a sample mean from an entered standard deviation and the number of independent observations.

Three Independent Events: All, Any, One or None

Combine three mutually independent event probabilities to find all three, at least one, exactly one and no-event chances.

Unordered Selections with Replacement: Count & List

Count multisets of r choices from n distinct types and display the full list for small examples.

Unordered Selections without Replacement: Count & List

Count r-object subsets of n distinct objects and display complete small-example lists.

Unrounded Equal-Class Width

Divide a numerical range into equal-width classes, retaining the unrounded width and compatible inverse values.

Variance Ratio & Nested Regression F Statistic

Compute a two-variance ratio or the residual-sum-of-squares F statistic for restricted and unrestricted nested regression models.

Data & Calculators: Summary Updates

Actual vs Expected Relative Error

Show the absolute error as a share of the expected value.

Add Value to Known Mean

Update a known mean after one new value is added.

Remove Value from Known Mean

Update a known mean after one value is removed from a list.

Two-Group Combined Mean

Find one mean from two group means and their group sizes, without the raw lists.

Two-Group Combined Variance

Find one population variance from two group means, variances, and sizes.

Data & Calculators: Tables & Data

Editable Data Table

Open CSV or JSON as an editable table. Keep exact text, change individual cell types, filter rows and save your work privately.

Record Review Queue

Review a table row by row, flag problems, attach notes and export accepted, rejected and pending records without uploading your data.

Data & Calculators: Tests & Evidence

One-Sample T-Score Calculator

Calculate the t statistic for a sample against an expected mean.

Poisson Chi-Square Fit Checker

Test whether a large list of non-negative event counts departs from a fitted Poisson distribution.

Two-Group Permutation P-Value

Estimate a p-value by repeatedly reshuffling two groups with a repeatable seed.

Two-Sample T-Score Calculator

Calculate a t statistic for the difference between two independent samples.

Wilcoxon Rank Sum Score

Add the ranks of the first sample after both samples are sorted together.

Data & Calculators: Time & Calendars

Calendar Conflict Finder

Find overlapping events in an ICS calendar. Choose event series and see when each clash starts and how long it lasts.

Community Event Calendar

Keep a clear calendar of local events, with categories, locations, search and a portable agenda to share.

Course Schedule Exporter

Turn weekly classes, term dates and skipped days into a time-zone-aware calendar you can import anywhere.

Daylight-Saving Transition Explorer

See when clocks change in a time zone. Find skipped or repeated times and compare each local time with UTC.

Recurring Schedule Debugger

Check which dates a calendar repeat rule creates. Find skipped dates and see how time zones and clock changes affect the schedule.

Weekly Time-Block Planner

Make room for your tasks in a weekly calendar. Drag, resize, edit and save your plan on your device.