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Browse calculators by topic Finance, everyday life, construction, conversions, and more.

3633 apps · Showing 1825–1920

Data & Calculators: Measure & Navigate

Map Point Distance Calculator

Find the earth distance between two longitude and latitude pairs.

Point Along Route Finder

Place a point at an exact distance from the start of a GeoJSON route.

Data & Calculators: Select & Compare

GeoJSON Line Intersection Finder

Find every point where two GeoJSON lines cross each other.

GeoJSON Point Cluster Analyzer

Group a point collection with K-means or DBSCAN and add a cluster number to every point.

GeoJSON Polygon Overlap Checker

Check whether two polygons touch or overlap, and draw the shared area when one exists.

Nearest Map Point Finder

Compare one target coordinate with a GeoJSON point list and find the closest point.

Nearest Point on Route Finder

Find the closest spot on a GeoJSON route to any longitude and latitude point.

Point in Polygon Checker

Check whether a longitude and latitude point is inside a GeoJSON polygon.

Points in Polygon Filter

Keep only the GeoJSON points that fall inside a polygon or multipolygon.

Data & Calculators: Shape & Transform

Convex Hull Maker

Draw the smallest simple convex polygon that wraps around a set of points.

GeoJSON Bounding Box Clipper

Cut a line or polygon so only the part inside a bounding box remains.

GeoJSON Buffer Maker

Draw a set-distance zone around a point, line, or polygon.

GeoJSON Line Offset Maker

Create a new line a set distance to one side of a GeoJSON route.

GeoJSON Polygon Difference Maker

Remove the second polygon from the first and keep the area that remains.

GeoJSON Polygon Dissolve Maker

Merge touching polygons that share the same group property and keep separate groups apart.

GeoJSON Polygon Intersection Maker

Create the map area that two polygons have in common.

GeoJSON Polygon Union Maker

Combine two or more polygons into one polygon or multipolygon result.

GeoJSON Rotate Scale and Move Tool

Rotate a map shape, scale it from its centre, and move it by distance and bearing.

GeoJSON Route Slice Maker

Cut out the part of a GeoJSON route between two distances from its start.

GeoJSON Simplifier

Remove extra coordinates while keeping the main shape of a line or polygon.

Data & Calculators: Grids & Patterns

GeoJSON Circle Polygon Maker

Turn a centre point and radius into a GeoJSON polygon that follows ground distance.

GeoJSON Sector Shape Maker

Create a pie-slice map polygon from a centre, radius, start bearing, and end bearing.

Hexagon Map Grid Maker

Create a flat-top hexagon GeoJSON grid for sampling, planning, or map analysis.

Map Point Grid Maker

Create evenly spaced GeoJSON points inside a map bounding box.

Random GeoJSON Point Generator

Create any number of random GeoJSON points inside a bounding box for tests and demos.

Square Map Grid Maker

Create an even square GeoJSON grid inside any west, south, east, and north box.

Voronoi Map Maker

Split a map into cells so every place belongs to its nearest input point.

Data & Calculators: View & Inspect

CSV Viewer

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

Data & Calculators: Clean & Organize

CSV Cleaner

Trim extra spaces, remove empty rows and columns, and repair uneven CSV data in one private pass.

CSV Column Picker

Choose, reorder, and export only the CSV columns you want while leaving the original file untouched.

CSV Sorter

Sort a CSV by any column from A to Z, Z to A, smallest to largest, or largest to smallest.

Remove Duplicate CSV Rows

Find repeated CSV rows by every column or the columns you choose, then keep one clear copy of each row.

Data & Calculators: Convert

CSV Delimiter Converter

Change commas, tabs, semicolons, or pipes without breaking quoted text, commas inside cells, or line breaks.

CSV to JSON Converter

Convert CSV or TSV rows into clean JSON objects, with each heading used as a clear field name.

JSON to CSV Converter

Convert a JSON object or list of objects into a spreadsheet-ready CSV with one column for every field.

Data & Calculators: Combine & Split

Merge CSV Files

Combine CSV files into one table, match columns by heading, and leave a blank when a file is missing a value.

Split CSV

Break one large CSV into smaller files with the same headings and the exact number of rows you choose.

Data & Calculators: Date Calculators

Age Calculator

Find an exact age in years, months, and days, plus the next birthday and useful age milestones.

Business-Day Calculator

Count workdays or add business days using your workweek and a custom holiday list.

Date Difference Calculator

Measure the exact time between two moments in calendar units, hours, minutes, and seconds.

Days Between Dates Calculator

Count calendar days between two dates with clear start-day and end-day inclusion choices.

Data & Calculators: Everyday Math

Percentage Calculator

Solve percentage questions, changes, increases, and decreases with the formula shown in plain language.

Unit Converter

Convert length, weight, temperature, area, volume, speed, time, data, energy, and pressure units.

Data & Calculators: Clocks & Timers

Countdown Timer

Count down a duration or a future date with quick presets, pause controls, and an optional finish sound.

Stopwatch

Time anything with a precise stopwatch, lap splits, best and slowest laps, and keyboard controls.

World Clock & Meeting Planner

Compare live local times around the world and find a meeting time that lands on the right day.

Data & Calculators: Business Pricing

Mobile Massage Travel Fee Calculator

Price 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

Camp Pricing & Break-Even Calculator

Try different prices and group sizes. See how many bookings could cover your costs.

Massage Room Rent vs Commission Calculator

Compare room rent and commission across working weeks, recovered no-show fees, full costs, hourly earnings, and client break-even.

No-Show Cost, Deposit & Cancellation Window Calculator

Calculate 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

Arithmetic Mean Finder

Add a list of numbers and divide by how many values it has.

Geometric Mean Finder

Find the geometric mean of positive numbers such as growth factors.

Harmonic Mean Finder

Find the harmonic mean of positive rates or ratios.

Log Average Finder

Find an average in log space for positive values that span a wide range.

Most Common Number Finder

Find the number that appears most often in a list.

Number List Extent Finder

Find both ends of a number list and the distance between them.

Number List Median Finder

Sort a number list and find the value in its middle.

Number List Product Finder

Multiply all numbers in a list and show the final product.

Precise Number List Sum

Add many values with a method that reduces floating-point rounding loss.

Root Mean Square Finder

Square, average, and take the root to measure the size of changing values.

Data & Calculators: Biology Calculators

Cell Population Doubling Time & Continuous Growth Rate

Calculate exponential doubling time and continuous growth rate from a rising cell count or concentration measured over a positive time interval.

Cell Suspension Dilution: Concentration & Volume

Balance cell concentration and volume before and after dilution using conservation of cell count and compatible volume units.

DNA Insert Mass from Vector Mass & Molar Ratio

Calculate insert DNA mass from vector mass, fragment lengths and a chosen insert-to-vector molar ratio, with bp/kb and mass unit choices.

Exponential Bacterial Growth & Doubling Time

Relate initial and final populations, elapsed time, hourly fractional growth and doubling time during ideal exponential growth.

Field Coverage from Width, Speed & Overlap

Estimate area covered per hour and moving time from implement width, travel speed and overlap, with acre and hectare conversion.

Log Reduction, Surviving Count & Percent Reduction

Convert positive before-and-after counts into decimal-log and percentage reductions, including inverse count calculations.

Observed Mutant Fraction of a Population

Calculate observed mutant frequency from mutant and total counts, or recover a count from the fraction.

qPCR Standard-Curve Efficiency & Amplification Factor

Convert a negative standard-curve slope to amplification factor and apparent qPCR efficiency, or recover slope from the factor.

Data & Calculators: Camp Operations

Camp Staffing Planner

Plan your team, shifts and breaks. Spot times when you need more help.

Data & Calculators: Charts & Data

Chart Specification Playground

Edit a Vega-Lite chart in JSON. Preview changes, check errors and download the chart as SVG or its settings as JSON.

Custom Infographic Builder

Make an infographic from CSV data. Choose bars, dots or number cards, edit the artwork and download SVG or PNG images.

Data Quality Visualizer

Check CSV data for missing values, duplicate rows and unusual numbers. Explore charts and download a column report.

Data Story Slide Builder

Turn data into a slide presentation. Add charts and notes, arrange slides and download a presentation that opens in a browser.

Declarative Chart Builder

Build a Vega-Lite chart from CSV data. Choose columns, chart marks and summaries, then save the chart and its settings.

Function Graphing Pad

Plot up to six math functions together. Change values and graph ranges, zoom in and download the chart.

Hierarchical Data Explorer

Show nested JSON as a treemap, sunburst or icicle chart. Open each branch to explore its values and save an image.

Interactive Chart Studio

Make bar, line, scatter, pie and other charts from CSV data. Choose columns, group values and save your chart project.

Measured Data Surface Viewer

Turn x, y and z measurements into a 3D surface. Rotate the view, add contour lines and download the chart.

Personal History Timeline

Make a timeline of personal events. Add dates, groups and notes, then search your history and save an editable copy.

Personal Progress Dashboard

Track reading, habits and projects with charts. Add entries, set targets and save a copy of your dashboard.

Project Milestone Viewer

See project milestones on a timeline. Add dates and notes, group related work and focus on a chosen date range.

Sensor Comparison Dashboard

Compare sensor readings on shared or separate charts. Pick a time range and review missing values and number summaries.

Small Multiples Explorer

Compare groups of data in matching charts. Use histograms, box plots or violin plots with the same number scale.

Time-Series Log Viewer

Plot timestamped CSV measurements over time. Zoom into a range, spot gaps and download a summary of the selected data.