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1822 apps · Showing 1153–1248
Data & Calculators
1822 appsData & Calculators: Everyday Calculators
Mechanical Speedometer Gear Ratio at 1001 Revs/Mile
Relate tire diameter or rolling revolutions, axle ratio and drive/driven gear tooth counts using the captured 1001 cable-revolutions-per-mile calibration.
Minute Duration Converter & Ten-Value Sum
Convert a duration through minutes, seconds, hours and fixed longer units, or add the first two through ten duration values.
Minutes Between Two Clock Offsets
Subtract a start time from an end time using hours, minutes and seconds, with editable duration units.
Nautical Distance & Constant-Speed Time Calculator
Convert nautical miles to metric or statute units, and calculate a separate constant-speed journey.
Paper Sheet Mass, Grammage & 500-Sheet Basis
Calculate sheet and stack mass from grammage, or convert 500-sheet basis weights using retained paper-size and basic-sheet presets.
Paper Stack & Sheet Thickness Calculator
Estimate average sheet thickness from a measured paper stack.
Per-Minute Service Cost Calculator
Compare a service or activity cost with its duration.
Pet-Sitting Hourly Cost & Multi-Day Budget
Calculate an hourly pet-sitting budget from care hours per day, days of care and the agreed hourly rate.
Podcast Listening Time & Episode Capacity
Estimate episode equivalents from daily listening opportunities, playback speed and an explicit extra-time allowance.
Price per Gram & Multipack Comparison
Compare prices per gram for single quantities or equal-weight multipacks, with other mass units and reverse calculations.
Price per Ounce & Multipack Comparison
Compare prices per ounce for single quantities or equal-weight multipacks, with other mass units and reverse calculations.
Price per Pound & Multipack Comparison
Compare prices per pound for single quantities or equal-weight multipacks, with other mass units and reverse calculations.
Production Date plus Entered Fixed Storage Duration
Calculate production date plus entered fixed storage duration with calendar inputs, retained inverse relationships and explicit duration conventions.
Production Time per Unit Calculator
Calculate average cycle time from output and net available production time.
Reading & Speaking Duration Planner
Estimate reading and speaking duration using presets or your own pace.
Reading Pace & Book Planning Calculator
Connect reading pace, daily reading time, pages and books over a chosen period.
Recurring Rate per Year, Day, Hour & Second
Convert an average count or signed quantity per time unit between years, months, weeks, days, hours, minutes and seconds.
Reward-Mile Valuation & Cash Fare Comparison
Compare a cash fare with miles plus fees using an entered cents-per-mile valuation or the retained illustrative airline presets.
Room Lumens & Bulb Count from Target Lux
Estimate lumens and whole bulbs from rectangular area and target illuminance, with retained room presets and a custom target.
Series Total Watch Time Calculator
Add up viewing time from episode length, episodes and seasons.
Session Duration Total & Decimal-Hour Converter
Total up to twenty hours-and-minutes durations, with a separate decimal-hours and minutes conversion pair.
Shower Water & Heating Cost Model Calculator
Estimate daily water use and running costs with an explicit fixed heating-energy factor.
Single-Session Electricity Cost Calculator
Estimate energy use and electricity cost for one operating session.
Specified Petrol-to-Oil Volume Calculator
Calculate the oil amount for a supplied petrol-to-oil ratio.
Speech Duration, Word Count & Speaking Rate
Estimate speech duration from word count and a selected pace, enter a custom rate, or measure your rate from a timed passage.
Stacked Firewood Volume, Cords & Price
Convert a rectangular wood stack into full cords, a fixed 16-inch face-stack comparison and total price using exact cubic-foot conversion.
Time Span in Hours, Minutes & Seconds
Subtract two times on the same timeline or solve for a start or end time.
Tire, Axle Ratio & Sensor Pulses per Mile
Estimate pulses per mile from wheel revolutions, axle reduction and sensor teeth under a stated sensor-position model.
Toothpaste Supply Duration & Repeat-Purchase Budget
Estimate how long a toothpaste tube lasts and its steady-use purchase cost from usable volume, portion size and household usage.
Traffic Flow, Density & Spacing Calculator
Relate average traffic counts, flow, density, spacing and speed.
Trip Distance, Fuel Economy & Cost Calculator
Calculate distance per unit of fuel, reciprocal consumption and trip fuel cost.
Trip Fuel Cost & Return Journey Estimate
Estimate fuel quantity and entered-price cost for a one-way or return trip, using known consumption or measured distance and fuel.
Trip Fuel Use & Cost Calculator
Calculate fuel economy, consumption and fuel spending for a trip.
Twenty-Entry Duration Sum & Missing Time
Add up to twenty signed durations in hours, minutes and seconds, or solve a missing duration from the total.
Two-Product Unit Price & Pack Comparison
Compare two products by price per mass, volume or item, including multipacks and the absolute difference in unit prices.
Typing Words & Keystrokes Rate Calculator
Convert typing rates using five keystrokes per standard word.
Vehicle Base Weight, Payload & GVWR Arithmetic
Add a vehicle base weight and rated payload, or subtract either from a supplied gross vehicle weight rating.
Volume Ratio to Ideal Isothermal Pressure
Calculate the absolute-pressure change for a fixed amount of ideal gas held at constant temperature.
Water & Concentrate Mixture Calculator
Split a target mixture volume using a water-to-concentrate ratio.
Wheel Width & Offset Position Comparison
Compare changes in a wheel’s inner reach and outer position from width and signed offset.
Wizard Coin Galleon, Sickle & Knut Equivalents
Convert fictional coin amounts using the fixed relationships of 17 sickles per galleon and 29 knuts per sickle.
Data & Calculators: Groups & Breaks
Ckmeans Number Group Maker
Group a sorted number list so values inside each group stay close together.
Cluster Silhouette Score Checker
Group points with k-means, then score how well each point fits its group.
Equal Interval Breaks Maker
Make evenly spaced class breaks from the smallest value to the largest.
Jenks Natural Breaks Maker
Place break points where the number list has useful gaps.
K-Means Point Group Maker
Group two- or three-part points around nearby centers.
Kernel Density Estimate Maker
Estimate how tightly values gather around points across the list range.
Number Frequency Table Maker
Sort a number list and count how often every value appears.
Data & Calculators: Kitchen & Groceries
Data & Calculators: Local SQL
CSV SQL Workbench
Run SQL queries on CSV files in your browser. Check column types, combine tables and download your results.
JSON SQL Query Tool
Query JSON data with SQL on your device. Explore tables and nested values, then download the results.
SQL Practice Sandbox
Learn SQL with a working sample database, eight guided exercises, hints, checked results and reusable query notebooks.
SQLite File Explorer
Open a SQLite database on your device. Browse tables, inspect their links and download query results without uploading the file.
Table Join Builder
Join CSV or JSON tables by matching columns. Preview the SQL, choose how to keep unmatched rows and download the combined data.
Data & Calculators: Maps & GIS
Coordinate System Converter
Convert map coordinates between WGS84, Web Mercator, UTM and Canada Lambert. Check the converted points on a map.
Encoded Route Decoder
Decode an encoded polyline into map coordinates. Preview the route and download its longitude and latitude values.
Freehand Stroke Optimizer
Simplify a freehand drawing with fewer points. Compare detail levels and save a smaller SVG or editable project.
Geographic Measurement Desk
Measure routes and areas on a map. Draw or import shapes, find their centers and create a boundary around them.
GeoJSON to Shapefile Exporter
Convert GeoJSON to shapefile downloads. Keep map shapes and their data together with the files needed to open them.
GIS Attribute Export Assistant
Choose which map shapes and data fields to export. Download a smaller GIS dataset or a shapefile package.
GPX to GeoJSON Converter
Turn GPX tracks, routes and waypoints into GeoJSON and inspect their names, coordinates and properties.
KML to GeoJSON Converter
Convert local KML placemarks and geometry into editable GeoJSON with a map and attribute preview.
Personal Places Map
Pin meaningful places, edit coordinates and notes, organize categories and save a portable map dataset.
Photo Travel Map
Map GPS-tagged photos locally, inspect their locations and place photos without location tags by hand.
Route URL Packer
Turn route coordinates into a short encoded polyline. Preview the route and copy the text for use in mapping tools.
Shapefile Previewer
Open a local shapefile ZIP, choose a layer and inspect its map geometry, coordinate system and attribute records.
Shapefile to GeoJSON Converter
Convert supported shapefile archives into WGS84 GeoJSON while preserving geometry and decoded attributes.
Survey Coordinate Checker
Check whether two sets of map coordinates describe the same places. Measure the gaps and flag points beyond your chosen limit.
Data & Calculators: Numbers & Reports
Data & Calculators: Percentiles & Outliers
Five Number Summary Maker
Find the minimum, first quartile, median, third quartile, and maximum.
IQR Number List Outlier Finder
Use the 1.5 × IQR rule to flag unusually low or high values.
MAD Number List Outlier Finder
Use the median absolute deviation to find values far from the center.
Median Absolute Deviation Finder
Find the median distance from the list median, with less pull from extreme values.
Number List Interquartile Range
Find the distance between the first and third quartiles.
Number List Percentile Rank Finder
Find the share of a list that is at or below a chosen value.
Population Quantile Finder
Find the value at any population quantile from 0 to 1.
Data & Calculators: Personal Notebooks
Offline Inventory Notebook
Keep belongings, quantities, photo previews and locations in a searchable local notebook, with complete backups and CSV import.
Offline Recipe Notebook
Save recipes with ingredient lists, ordered steps and photos. Search locally, scale quantities and export a clean printable recipe.
Personal Snippet Vault
Keep reusable text and code snippets in searchable categories, with tags, favorites, exact-text copying and portable exports.
Reading & Watchlist Tracker
Keep books, films, series and courses together. Track progress, ratings, dates and notes in a private, searchable local collection.
Data & Calculators: Physics Calculators
Alfvén Wave Speed from Field and Mass Density
Calculate alfvén wave speed from field and mass density with compatible units, known-value inputs and clearly stated model assumptions.
Angular Acceleration from Rate Change or Tangential Motion
Calculate signed average angular acceleration from initial/final rotation rates and elapsed time, or from tangential acceleration and radius, with all captured units and inverses.
Angular Momentum for a Particle or Fixed-Axis Body
Calculate angular momentum from mass, tangential velocity and radius, or from moment of inertia and angular velocity.
Angular Rate, Cycle Frequency & Period
Calculate mean angular rate from displacement and time, or cyclic angular frequency from cycle frequency and period.
Angular Size & Milliradian Distance Estimate
Estimate range from a known object height and its angular height using the small-angle milliradian relationship.
Angular Velocity from Angle, Time or Tangential Motion
Find signed angular velocity from angle change over elapsed time or from tangential velocity and radius, with optional endpoint angles, RPM/radians/hertz and inverse controls.
Biot Number from Volume, Area & Thermal Properties
Calculate characteristic length V/A and Biot number from convection coefficient and solid conductivity with consistent thermal units.
Blackbody Wavelength and Frequency Peaks
Find the separate wavelength-density and frequency-density peaks of ideal blackbody radiation, with editable temperature inverses and exact SI constants.
Bragg Diffraction Angle & Lattice Spacing
Calculate Bragg angle, wavelength, lattice spacing or positive integer diffraction order using the principal physical angle.
Buoyancy & Displaced Fluid Mass
Calculate buoyant force from submerged volume, fluid density and gravity, using fluid presets or a custom density.
Capacitance for Ideal Stored Energy
Calculate ideal capacitance from a positive stored-energy target and voltage magnitude.
Capacitor Charge, Voltage & Stored Energy
Relate positive capacitance, voltage, charge and energy in an ideal linear capacitor.
Capacitor Reactance & Angular Frequency
Relate positive capacitance and frequency to capacitive-reactance magnitude in an ideal AC model.
Capacity-to-Load Ratio & Factor of Safety
Calculate the ratio of positive load capacity to applied design load, including ratios at or below one.
Carrier Drift, Current and Cross-Section
Balance electric current with carrier density, charge magnitude, cross-sectional area and signed drift using all captured units and inverse relationships.