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Data & Calculators

1770 apps

Data & Calculators: Percentiles & Outliers

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: Personal Notebooks

Notebook / JSON / CSV · ConvertOffline Inventory NotebookKeep belongings, quantities, photo previews and locations in a searchable local notebook, with complete backups and CSV import.Notebook / JSON / CSV · ConvertOffline Recipe NotebookSave recipes with ingredient lists, ordered steps and photos. Search locally, scale quantities and export a clean printable recipe.Notebook / JSON / CSV · ConvertPersonal Snippet VaultKeep reusable text and code snippets in searchable categories, with tags, favorites, exact-text copying and portable exports.Notebook / JSON / CSV · ConvertReading & Watchlist TrackerKeep books, films, series and courses together. Track progress, ratings, dates and notes in a private, searchable local collection.

Data & Calculators: Physics Calculators

Calculator · CalculateAlfvén Wave Speed from Field and Mass DensityCalculate alfvén wave speed from field and mass density with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateAngular Momentum for a Particle or Fixed-Axis BodyCalculate angular momentum from mass, tangential velocity and radius, or from moment of inertia and angular velocity.Calculator · CalculateAngular Rate, Cycle Frequency & PeriodCalculate mean angular rate from displacement and time, or cyclic angular frequency from cycle frequency and period.Calculator · CalculateAngular Size & Milliradian Distance EstimateEstimate range from a known object height and its angular height using the small-angle milliradian relationship.Calculator · CalculateBiot Number from Volume, Area & Thermal PropertiesCalculate characteristic length V/A and Biot number from convection coefficient and solid conductivity with consistent thermal units.Calculator · CalculateBragg Diffraction Angle & Lattice SpacingCalculate Bragg angle, wavelength, lattice spacing or positive integer diffraction order using the principal physical angle.Calculator · CalculateBuoyancy & Displaced Fluid MassCalculate buoyant force from submerged volume, fluid density and gravity, using fluid presets or a custom density.Calculator · CalculateCapacitance for Ideal Stored EnergyCalculate ideal capacitance from a positive stored-energy target and voltage magnitude.Calculator · CalculateCapacitor Charge, Voltage & Stored EnergyRelate positive capacitance, voltage, charge and energy in an ideal linear capacitor.Calculator · CalculateCapacitor Reactance & Angular FrequencyRelate positive capacitance and frequency to capacitive-reactance magnitude in an ideal AC model.Calculator · CalculateCapacity-to-Load Ratio & Factor of SafetyCalculate the ratio of positive load capacity to applied design load, including ratios at or below one.Calculator · CalculateCell EMF, Terminal Voltage & Internal ResistanceRelate a cell’s ideal EMF, internal resistance and a positive resistive load during discharge.Calculator · CalculateCentrifuge RPM & Relative Force from Rotor RadiusConvert between RPM and relative centrifugal force using the entered rotor radius and the conventional rounded coefficient.Calculator · CalculateCharge, Voltage & Electric Potential EnergyConvert charge and electric potential difference into signed potential-energy change, in electron-volts or joules.Calculator · CalculateCharged Particle Acceleration in an Electric FieldCalculate charged particle acceleration in an electric field with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateCircular Aperture Rayleigh ResolutionEstimate the small-angle diffraction limit from wavelength and an ideal circular aperture diameter.Calculator · CalculateCircular Motion: Period, Speed & Inward AccelerationRelate period, cycle frequency and angular rate, or add radius to calculate tangential speed and centripetal acceleration.Calculator · CalculateCircular Shaft Twist from Torque & Torsional RigidityCalculate elastic twist of a uniform circular shaft using torque, length, polar second moment of area and shear modulus, including reverse inputs.Calculator · CalculateCircular-Motion Force, Acceleration & Angular SpeedSolve circular-motion relationships for force, acceleration, speed, radius or mass, with angular-speed unit conversion.Calculator · CalculateClassical Kinetic Energy from Mass & SpeedCalculate translational kinetic energy, mass or the nonnegative speed corresponding to an entered energy.Calculator · CalculateCompression Bulk Modulus & Volume StrainCalculate positive bulk modulus from a pressure increase and a negative volume change, retaining signed compressive strain.Calculator · CalculateCompton Photon Scattering Wavelength ShiftCalculate compton photon scattering wavelength shift with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateConical Heap Slope Angle, Height & RadiusRelate height and radius of an ideal conical heap to slope angle and a simple friction-equivalent ratio.Calculator · CalculateConstant-Pressure Gas Volume, Temperature and AmountRelate two positive ideal-gas states with fixed pressure and amount, preserve editable units and inverse controls, and calculate optional amount through the initial state.Calculator · CalculateConstant-Temperature Gas Pressure, Volume and AmountRelate absolute pressures and volumes at fixed temperature, preserve unit and inverse controls, and calculate the read-only amount from the initial state.Calculator · CalculateCritical Damping & Natural FrequencyFind critical viscous damping, mass, stiffness and the undamped natural frequency of a linear spring–mass system.Calculator · CalculateCube Mass, Density, Volume and Diagonal MeasurementsRelate a positive cube mass and density to its volume, edge, face diagonal and space diagonal while retaining every unit selector.Calculator · CalculateCylinder Mass, Density, Radius & HeightSolve density and mass from volume, or reveal cylinder dimensions to calculate volume from radius and height.Calculator · CalculateDC Voltage–Current Power & Resistance RatioCalculate signed DC power and the voltage-to-current ratio at a nonzero operating point.Calculator · CalculateDecibel Gain from Power or Voltage RatiosConvert positive power ratios and positive voltage-magnitude ratios to independent decibel gains.Calculator · CalculateDensity from Mass & Rectangular DimensionsFind density from positive mass and volume, or derive a rectangular solid’s volume from its three dimensions, with reverse calculations and unit choices.Calculator · CalculateDensity from Volume & Known MassFind density from positive mass and volume, or derive a rectangular solid’s volume from its three dimensions, with reverse calculations and unit choices.Calculator · CalculateDensity, Mass, Volume & Box DimensionsSolve average density, mass or volume, with optional length, width and height for a rectangular solid.Calculator · CalculateDielectric Brewster Angle & Index RatioCalculate Brewster angle or either positive refractive index for an ideal dielectric interface.Calculator · CalculateDisplaced Fluid, Buoyant Force & MassSolve buoyant force, displaced fluid mass or displaced volume using fluid density and local gravity.Calculator · CalculateDrivetrain Crawl Ratio & Gear Tooth RatioMultiply transmission, transfer-case and axle ratios, and calculate a separate axle ratio from ring and pinion tooth counts.Calculator · CalculateDynamic & Kinematic Viscosity with DensityConvert between positive dynamic and kinematic viscosity using mass density at the same fluid conditions.Calculator · CalculateElastic Solid Shear Wave SpeedRelate shear modulus, density and shear wave speed in a homogeneous linear elastic solid.Calculator · CalculateElectrical Conductivity & Resistivity ConverterConvert electrical conductivity and resistivity in either direction, with selectable material examples and custom values.Calculator · CalculateEngine Bore, Stroke & Swept VolumeFind total swept displacement from a common cylinder bore, stroke and positive whole-cylinder count.Calculator · CalculateEngine Torque, Displacement & BMEPCalculate brake mean effective pressure from torque, total swept displacement and crankshaft revolutions per cycle.Calculator · CalculateEngineering Length Strain & Entered Threshold ComparisonCalculate engineering strain from original and final length and compare it with an explicitly illustrative or custom threshold.Calculator · CalculateF-Number, Entrance Pupil Diameter & AreaRelate focal length, f-number and the diameter and area of an ideal circular entrance pupil.Calculator · CalculateFirst-Order RC & RL Corner FrequencyFind the ideal first-order corner frequency for a selected RC or RL circuit model.Calculator · CalculateFlash-to-Thunder Delay and Distance EstimateEstimate lightning sound-path distance from the measured flash-to-thunder delay and an editable positive sound speed.Calculator · CalculateFluid Depth & Hydrostatic Absolute PressureCalculate absolute pressure at depth from fluid density, gravity and surface pressure, with reverse solutions and density presets.Calculator · CalculateFluid Drag Force, Coefficient & AreaCalculate positive drag force from fluid density, relative speed, drag coefficient and its matching reference area.Calculator · CalculateForce, Radius & Angle Torque MagnitudeCalculate the magnitude of a single force’s torque about a pivot, including its direction angle.Calculator · CalculateFree-Fall Arrival Velocity, Drop Distance & TimeSolve the downward displacement, elapsed time and initial velocity of an ideal fall under constant gravity, preserving reverse inputs and unit choices.Calculator · CalculateFree-Fall Distance from Time, Initial Speed & GravitySolve the downward displacement, elapsed time and initial velocity of an ideal fall under constant gravity, preserving reverse inputs and unit choices.Calculator · CalculateFree-Fall Height & Time with Initial VelocitySolve the downward displacement, elapsed time and initial velocity of an ideal fall under constant gravity, preserving reverse inputs and unit choices.Calculator · CalculateFree-Fall Time from Drop Distance & Initial VelocitySolve the downward displacement, elapsed time and initial velocity of an ideal fall under constant gravity, preserving reverse inputs and unit choices.Calculator · CalculateFrequency from Wavelength & Wave SpeedConvert between wavelength and frequency using a medium preset or your own positive phase speed.Calculator · CalculateFrequency Prefix Conversion in HertzCalculate frequency prefix conversion in hertz with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateFriction Coefficient & Normal ForceCalculate μN for kinetic friction or a maximum static-friction estimate using a supplied coefficient.Calculator · CalculateFriction Force from Contact Load & CoefficientFind kinetic friction or the limiting static friction from a coefficient and the normal contact force.Calculator · CalculateFriction, Normal Force & CoefficientRelate sliding friction or limiting static friction to normal force and a nonnegative friction coefficient.Calculator · CalculateFull Circular Pipe Flow & Mean VelocityRelate volumetric flow rate, inside pipe diameter and cross-sectional mean speed for a full circular pipe.Calculator · CalculateGas Compressibility Factor and Missing State ValuesCalculate positive compressibility factor from measured gas-state quantities, or recover a supported missing quantity with a known positive factor.Calculator · CalculateGas Volume & Amount at Constant Temperature and PressureUse Avogadro’s relation to calculate one gas volume or amount from the other three positive values.Calculator · CalculateGear Speed Reduction & Reciprocal MultiplierFind the tooth ratio, output speed and reciprocal speed multiplier for a compatible gear pair.Calculator · CalculateGear Teeth Ratio & Output RPMCalculate a gear ratio from tooth counts and convert between input and output rotation rates.Calculator · CalculateGear Tooth Count, Pitch Diameter & ModuleRelate positive whole tooth count, pitch-circle diameter, tooth density and gear module.Calculator · CalculateGrams & Cubic Centimeters by DensityConvert between mass in grams and volume in cubic centimeters using the density you supply.Calculator · CalculateGravitational Potential Energy from Reference HeightRelate mass and signed height to gravitational potential energy in a uniform gravitational field.Calculator · CalculateGravity from Mass & Center DistanceRelate gravitational acceleration, source mass and distance from its center using Newton’s inverse-square model.Calculator · CalculateHydraulic Head Difference & GradientFind the signed head drop per unit distance between two points sharing a hydraulic-head datum.Calculator · CalculateIdeal Boost Converter Duty Cycle and Ripple InductanceCalculate ideal boost converter duty cycle and ripple inductance using known measurements, selectable units and clear physical assumptions.Calculator · CalculateIdeal Broad-Crested Weir Head, Width & FlowEstimate ideal rectangular broad-crested weir discharge from upstream head, transverse crest width and gravity.Calculator · CalculateIdeal Buck Converter Duty Cycle and Ripple InductanceCalculate ideal buck converter duty cycle and ripple inductance using known measurements, selectable units and clear physical assumptions.Calculator · CalculateIdeal Gas Molecular Root Mean Square SpeedFind molecular RMS speed from absolute temperature and molar mass, with retained gas presets, custom mass and reviewed hydrogen and water values.Calculator · CalculateIdeal Gas Pressure from State & MolesFind ideal-gas pressure from the pressure-volume-temperature relation, with optional gas mass and molar mass to determine moles.Calculator · CalculateIdeal Gas Pressure, Volume, Amount and Gas MassCalculate ideal gas pressure, volume, amount and gas mass using known measurements, selectable units and clear physical assumptions.Calculator · CalculateIdeal Gas Temperature from State & MolesFind ideal-gas temperature from the pressure-volume-temperature relation, with optional gas mass and molar mass to determine moles.Calculator · CalculateIdeal Gas Volume from State & MolesFind ideal-gas volume from the pressure-volume-temperature relation, with optional gas mass and molar mass to determine moles.Calculator · CalculateIdeal Heat Engine Carnot EfficiencyFind the reversible heat-engine efficiency limit between two reservoir temperatures, using absolute temperature internally.Calculator · CalculateIdeal LC Natural Resonance FrequencyCalculate the natural frequency of an ideal inductor-capacitor model and solve for either component.Calculator · CalculateIdeal Lever Force, Arms & Mechanical AdvantageBalance ideal lever moments and calculate force ratio from perpendicular effort and load arms.Calculator · CalculateIdeal Piston Pressure, Bore & ForceCalculate ideal piston force from positive pressure difference and a full circular bore area.Calculator · CalculateIdeal Rocket Delta-v from Exhaust Speed & Mass RatioRelate ideal velocity change to effective exhaust speed and initial/final mass using the Tsiolkovsky equation, with all four inverse paths.Calculator · CalculateIdeal Transformer Turns, Voltage & Current RatioExplore ideal transformer voltage and load-current magnitudes from a positive turns ratio.Calculator · CalculateIdeal-Gas Density, Pressure & Molar MassRelate ideal-gas density to absolute pressure, absolute temperature and molar mass, with paired mass and mole units.Calculator · CalculateIlluminance in Lux & Foot-CandlesConvert nonnegative illuminance between lumens per square meter and lumens per square foot.Calculator · CalculateInductor Current & Stored Magnetic EnergyCalculate stored energy in a linear ideal inductor from positive inductance and signed current.Calculator · CalculateInductor Reactance & Susceptance MagnitudeCalculate ideal inductive-reactance magnitude and its reciprocal at a positive frequency.Calculator · CalculateInsertion Loss from Power or Equal-Impedance VoltageCalculate insertion loss from power or equal-impedance voltage using known measurements, selectable units and clear physical assumptions.Calculator · CalculateInverting Buck-Boost Duty Cycle from Output MagnitudeCalculate inverting buck-boost duty cycle from output magnitude using known measurements, selectable units and clear physical assumptions.