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1822 apps · Showing 769–864

Data & Calculators

1822 apps

Data & Calculators: Other Calculators

Grade Calculator

Calculate a current percentage and the score needed on a remaining final assessment.

Gravel Calculator

Estimate gravel volume, weight, and delivery tonnage from area, depth, and material density.

Ground Pixel Size from Camera Geometry

Estimate ground sampling distance from height above ground, physical sensor width, real focal length and image width in pixels.

Ham Portion Weight & Guest Planner

Estimate a ham purchase weight from equivalent servings using the retained boneless and bone-in portion assumptions.

Heat Index Calculator

Estimate apparent temperature from air temperature and relative humidity with the NOAA regression.

Height Calculator

Estimate a child's mid-parental adult height range from biological-parent heights and the sex adjustment used by the method.

Horsepower Calculator

Calculate mechanical horsepower and watts from force, travel distance, and elapsed time.

Hours Calculator

Calculate elapsed work time between clock times, including overnight shifts and an unpaid break.

Ideal Op-Amp Gain from Resistor Ratio

Calculate ideal inverting gain magnitude or non-inverting voltage gain from the input and feedback resistors, with reverse resistance calculations.

Impact Angle from Ellipse Width & Length

Estimate an impact angle from the short and long axes of an ideal elliptical mark, or solve an axis from a supplied angle.

Independent Drop Odds & Expected Wait

Calculate the probability of at least one success over repeated independent attempts, plus the expected wait from a fixed per-attempt chance.

Inventory Reorder Level from Days of Cover

Calculate a stock reorder level from replenishment lead time, base-cover days, safety-cover days and a steady sales rate.

IP Subnet Calculator

Calculate IPv4 network, broadcast, usable host range, mask, wildcard, and host capacity from CIDR notation.

Large File Download Deadline and Throughput

Calculate ideal download time or the sustained data rate needed for a deadline, including decimal and binary file sizes up to yottabytes and yobibytes.

Love Calculator

Create a stable, playful name-match score for entertainment, with the same names always returning the same result.

Mashed-Potato Servings & Recipe Mass Planner

Scale mashed-potato portions by mass or estimated cup volume, using an explicit 210 g-per-cup assumption and an 80/20 potato-to-liquid mass split.

Mass Calculator

Calculate mass from density and volume, with grams, kilograms, and pounds.

Mileage Calculator

Calculate business mileage reimbursement and fuel-cost comparison for a trip.

Molarity Calculator

Calculate solution molarity, millimolar concentration, and amount from moles and volume.

Molecular Weight Calculator

Calculate molar mass from a chemical formula, including grouped formulas such as Ca(OH)2.

Mulch Calculator

Estimate mulch volume and bag count from landscape area, depth, and bag size.

Multirotor Thrust Target per Motor

Estimate a static thrust target per motor from total mass, motor count and a chosen thrust-to-weight ratio.

Non-Drop Timecode to Whole Frame Count

Convert canonical hours, minutes, seconds and frame components to a frame offset at a whole-number constant frame rate.

Ohm's Law Calculator

Calculate voltage, current, resistance, and power from any two selected electrical values.

Password Generator

Generate a high-entropy password locally with configurable length and character sets.

Popcorn Kernels, Portions & Calorie Estimate

Estimate kernels for a group from portion size and an assumed popping yield, with illustrative calories per portion.

Rainfall Depth & Catchment Water Volume

Calculate theoretical water volume from rainfall depth and catchment area, with optional rectangular dimensions and volume conversions.

Resistor Calculator

Decode a four-band resistor value from colour digits, multiplier, and tolerance.

Rice & Water Volume Ratio Planner

Scale water volume from dry-rice volume using the retained rice presets or your own water-to-rice ratio.

Rolled Material Length, Core and Thickness

Estimate tightly packed roll length from outer diameter, core diameter and uniform material thickness, or solve a missing measurement with compatible units.

Roman Numeral Converter

Convert whole numbers to canonical Roman numerals or Roman numerals to decimal values.

Roofing Calculator

Estimate sloped roof area, roofing squares, bundles, and waste from plan dimensions and roof pitch.

Shoe Size Conversion

Estimate equivalent US, UK, and EU adult shoe sizes from one selected system.

Signal Travel Delay & Velocity Factor

Calculate one-way propagation time from path length and signal speed, using captured material presets or a custom speed.

Sleep Calculator

Plan bedtimes or wake times around approximate 90-minute sleep cycles and a settling allowance.

Speed Calculator

Calculate speed from distance and time with km/h, m/s, mph, and pace conversions.

Square Footage Calculator

Calculate rectangular area, total quantity, waste allowance, square yards, and square metres.

Stair Calculator

Estimate riser count, actual rise, tread run, staircase length, and stringer length.

THD Percentage & Decibel Level

Convert a total harmonic distortion amplitude ratio between percentage and decibels over the captured 0.001%–100% range.

Tile Calculator

Estimate tile count, area, and boxes from surface and tile dimensions with grout and waste allowance.

Time Calculator

Add or subtract two hour-minute-second durations and convert the result to total units.

Time Card Calculator

Calculate weekly hours and gross pay from a repeating shift, workdays, break, rate, and overtime settings.

Time Duration Calculator

Calculate elapsed time between two clock times, including overnight spans and break deductions.

Time Zone Calculator

Convert a local date and time between fixed UTC offsets, including dates that cross midnight.

Time-Lapse Frames, Interval & Storage Plan

Plan frame count, capture interval and photo storage from final clip duration, playback frame rate and recording time.

Tip Calculator

Calculate tip, total bill, and per-person split with optional sales tax separated from the tipping base.

Tire Size Calculator

Compare two metric tire sizes for diameter, circumference, sidewall, revolutions, and speedometer difference.

Two-Quarter & Final Exam Semester Grade

Combine two quarter scores and a final exam using weights totaling 100%, or solve a missing score or weight.

Two-Year Journal Citation Ratio

Calculate citations divided by two years of citable-item counts, with clear numerator, denominator and reporting-window assumptions.

Uncompressed Audio Size & PCM Bitrate

Calculate raw PCM audio size and bitrate from sample rate, bit depth, channels and duration, with reverse duration calculations.

Uncompressed Image Pixel Data Size

Calculate theoretical image data from pixel dimensions and bits per pixel, with decimal and binary data-size units.

Uncompressed Video Frame & Storage Size

Estimate ideal uncompressed frame size and video pixel-data size from dimensions, bits per pixel, integer frame rate and duration.

URL Encode / Decode

Encode text for a URL component or decode percent-encoded text locally.

US Butter Sticks, Grams, Cups & Spoons

Convert US quarter-pound butter sticks to exact mass equivalents and conventional US recipe cups, tablespoons, teaspoons and millilitres.

Voltage Drop Calculator

Estimate two-conductor copper or aluminum circuit voltage drop from length, current, voltage, and wire area.

Weight Calculator

Calculate gravitational weight force from mass and local gravitational acceleration.

Whole Frame Count to Non-Drop Timecode

Split a whole frame count into hours, minutes, seconds and remaining frames at a positive whole-number frame rate.

Wind Chill Calculator

Calculate the North American wind-chill index from air temperature and wind speed.

Data & Calculators: GeoJSON Basics

GeoJSON Bounding Box Maker

Find the smallest west, south, east, and north box that holds your GeoJSON.

GeoJSON Center and Centroid Finder

Find the centre of the outer box and the centre made from all shape points.

GeoJSON Coordinate Cleaner

Remove needless repeated points from lines and polygons without changing their visible shape.

GeoJSON Line to Polygon Converter

Close a GeoJSON line and turn it into a polygon feature.

GeoJSON Polygon to Line Converter

Convert polygon rings into GeoJSON lines while keeping the feature properties.

GeoJSON Validator

Check whether GeoJSON is readable and whether each map shape follows the basic geometry rules.

Data & Calculators: Measure & Navigate

Bearing and Midpoint Calculator

Find the compass bearing, distance, and halfway point between two map coordinates.

Destination Point Maker

Start at one coordinate, travel a set distance and bearing, and get the destination point.

GeoJSON Area Calculator

Measure a polygon in square metres, square kilometres, hectares, and acres.

GeoJSON Route Length Calculator

Find the full ground distance of a GeoJSON line in kilometres, miles, metres, or nautical miles.

Great Circle Route Maker

Create a curved GeoJSON route that follows the shortest path across the globe between two points.

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.