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Data & Calculators
1770 appsData & Calculators: Physics Calculators
Calculator · CalculateKilogram-Force, Newtons & Force UnitsConvert kilogram-force, newtons and other force units using standard gravity and exact unit definitions.Calculator · CalculateKnudsen Number from Mean Free Path & LengthCalculate the dimensionless ratio of molecular mean free path to a chosen characteristic length, with inverse calculations.Calculator · CalculateLift Force & Flow CoefficientRelate positive lift force to fluid density, flow speed, reference area and dimensionless lift coefficient.Calculator · CalculateLight Travel Time & DistanceConvert propagation time and distance at vacuum light speed or a supplied positive speed up to that limit.Calculator · CalculateLight Travel Time & Distance in Julian YearsConvert travel time to distance using the vacuum speed of light or a lower positive propagation speed, with astronomical units.Calculator · CalculateLinear Momentum Components & Vector MagnitudeCalculate one-dimensional momentum or three Cartesian momentum components and magnitudes from positive mass and signed velocities.Calculator · CalculateLinear Spring Restoring Force & DisplacementCalculate the signed restoring force of an ideal passive spring from its stiffness and change in length.Calculator · CalculateLinear Spring Stored EnergyCalculate elastic energy in an ideal linear spring from its stiffness and signed displacement from equilibrium.Calculator · CalculateLong Solenoid Inductance and Circular Cross SectionCalculate long solenoid inductance and circular cross section with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateLong Straight Wire Magnetic Field & DistanceEstimate magnetic field magnitude around a long straight current-carrying wire or solve current and distance.Calculator · CalculateLong Vacuum Solenoid Field from Current and TurnsCalculate long vacuum solenoid field from current and turns with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateMach Number, Speed and Dry-Air Temperature EstimateRelate positive object speed and sound speed to Mach number, with a retained approximate dry-air sound-speed and temperature inverse.Calculator · CalculateMagnetic Lorentz Force: Signed Transverse ScalarCalculate magnetic lorentz force: signed transverse scalar with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateMass from Density, Volume or Box DimensionsCalculate mass from density and entered volume or rectangular dimensions, with reverse density and volume calculations.Calculator · CalculateMaterial Mass & Total Heat CapacityCalculate total heat capacity from mass and specific heat, with editable custom values and reference material presets.Calculator · CalculateMaterial Mass from Density & VolumeFind mass, density or volume with exact customary-unit conversions and a supplied material density.Calculator · CalculateMaxwell–Boltzmann Mean Particle SpeedCalculate maxwell–boltzmann mean particle speed with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateMean Piston Speed from Stroke & Engine RateCalculate mean piston travel speed from stroke and crankshaft rotation rate, or solve either input.Calculator · CalculateNet Force from Mass & Signed AccelerationApply Newton’s second law along one axis, with signed force and acceleration and positive mass.Calculator · CalculateNet Force from Velocity Change & MassConnect constant mass, velocity change, elapsed time, average acceleration and average net force along one axis.Calculator · CalculateNet Force, Mass & AccelerationSolve F = ma for a positive mass using signed force and acceleration along one axis.Calculator · CalculateNewton’s Third Law — Two-Body Force & AccelerationRelate a force pair and the resulting accelerations of two positive masses along a shared coordinate axis.Calculator · CalculateNewtonian Escape and Circular-Orbit SpeedsCalculate newtonian escape and circular-orbit speeds with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateNormal Force, Area & Average PressureRelate positive normal force, loaded area and average pressure, with SI and customary pressure units.Calculator · CalculateOpen Channel Froude Number and Hydraulic Mean DepthFind Froude number from flow velocity and hydraulic mean depth, or recover a supported missing measure with unit controls.Calculator · CalculateOrbital Sidereal & Synodic PeriodsRelate two distinct positive sidereal periods to their synodic recurrence time for motion in the same direction.Calculator · CalculateOrdinary & Angular Wavenumber from WavelengthRelate wavelength, cycles per length and radians per length, with optional phase-speed presets.Calculator · CalculateOrdinary Compton Wavelength from Rest MassCalculate ordinary compton wavelength from rest mass with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculateParallel-Force Work & Average PowerRelate positive-duration average power to work from a constant force acting along a displacement.Calculator · CalculateParallel-Plate Capacitance, Area & GapSolve ideal parallel-plate capacitance, plate area, separation or absolute permittivity with selectable units.Calculator · CalculatePhoton Energy, Frequency and Vacuum WavelengthCalculate photon energy, frequency and vacuum wavelength with compatible units, known-value inputs and clearly stated model assumptions.Calculator · CalculatePoint-Source Intensity & Distance ScalingScale nonnegative intensity between two positive distances using an ideal inverse-square spreading model.Calculator · CalculatePoint-Source Sound Level at a New DistanceEstimate the sound-pressure-level change between two source distances under ideal spherical spreading.Calculator · CalculatePolarizer Angle & Transmitted Light IntensityApply Malus’s law to polarized light intensity, analyzer angle and the principal inverse angle.Calculator · CalculatePositive Lens Power & Focal LengthConvert positive focal length to positive optical power in diopters and solve the inverse.Calculator · CalculatePower-to-Mass Ratio — kW/kg & hp/lbCompare power per unit mass and solve for power or mass using metric and customary units.Calculator · CalculateProjectile Kinetic Energy and Exact Customary UnitsRelate positive projectile mass, nonnegative speed and kinetic energy, with exact customary conversions and the positive speed inverse.Calculator · CalculateProjectile Translational Kinetic EnergyCalculate projectile translational kinetic energy using known measurements, selectable units and clear physical assumptions.Calculator · CalculateRC Time Constant & Cutoff FrequencyCalculate an ideal RC time constant and cutoff frequency, with reverse solutions for resistance and capacitance.Calculator · CalculateRectangular Contact Pressure in PSI & PascalsCalculate average pressure from normal force and a rectangular contact area, with optional pressure-unit conversion.Calculator · CalculateRelativistic Kinetic Energy from Mass & SpeedCalculate relativistic kinetic energy from rest mass and speed, or recover rest mass from nonzero speed and kinetic energy.Calculator · CalculateRelativistic Length, Proper Length & SpeedSolve special-relativistic length contraction along the direction of motion, including reverse proper-length and speed solutions.Calculator · CalculateResistive Current, Time & Heat EnergyCalculate energy dissipated in a fixed resistance by a constant current over a positive duration.Calculator · CalculateResonant Bandwidth, Q & Cutoff FrequenciesRelate bandwidth, quality factor and cutoff frequencies in the retained second-order resonant model.Calculator · CalculateRest Mass & Energy EquivalenceConvert rest mass to its energy equivalent or recover mass from energy using the exact speed of light.Calculator · CalculateRestrained-Bar Thermal Stress — Compression PositiveEstimate thermal stress for a fully restrained linear-elastic bar using entered expansion coefficient, modulus and temperature change.Calculator · CalculateRigid-Body Pendulum Period & Pivot InertiaFind a physical pendulum’s small-angle period from pivot-axis inertia, mass, gravity and center-of-mass offset.Calculator · CalculateRotating Body Inertia & Kinetic EnergyFind rotational energy, inertia or angular-speed magnitude for a rigid body about a specified axis.Calculator · CalculateSealed-Volume Gas Pressure, Temperature and AmountRelate two positive ideal-gas states with fixed volume and amount, preserve editable units and inverse controls, and calculate optional amount through the initial state.Calculator · CalculateSensible Heat from Mass & Temperature ChangeCalculate heating or cooling energy using entered mass, specific heat and temperature change, with illustrative material presets.Calculator · CalculateSigned Conduction Heat Flux & Temperature GradientSolve one-dimensional heat flux, conductivity, temperature difference or thickness with temperature-interval units.Calculator · CalculateSigned Impulse, Momentum Change & Average ForceConnect initial and final velocity, momentum change, signed impulse and average net force over a positive time interval.Calculator · CalculateSimple Harmonic Motion — Sine-Phase ModelCalculate displacement, velocity and acceleration for ideal simple harmonic motion with zero initial sine phase.Calculator · CalculateSingle-Phase RMS Voltage, Current & Real PowerCalculate real electrical power using RMS voltage, RMS current and a supplied power factor.Calculator · CalculateSmall-Angle Pendulum Period & FrequencyCalculate period, frequency, length or gravity for an ideal simple pendulum at small amplitude.Calculator · CalculateSound Wavelength from Frequency & Medium SpeedFind sound wavelength or frequency using an illustrative medium preset or a custom propagation speed.Calculator · CalculateSpecific Gas Constant from Molar Mass or Heat CapacitiesCalculate specific gas constant from molar mass or heat capacities using known measurements, selectable units and clear physical assumptions.Calculator · CalculateSpectral Redshift from Wavelength or FrequencyCalculate dimensionless redshift or blueshift from positive emitted and observed vacuum wavelengths or frequencies.Calculator · CalculateSpherical Body Geometric Horizon DistanceCalculate the straight-line tangent distance to an ideal spherical horizon from height and radius.Calculator · CalculateStraight Wire Magnetic Force, Current & AngleCalculate force magnitude on a straight wire segment in a uniform magnetic field, including parallel zero-force cases.Calculator · CalculateTelescope Eyepiece Magnification & Sky FieldEstimate telescope magnification, true angular field and small-field circular area from focal lengths and eyepiece apparent field.Calculator · CalculateThermal Diffusivity from Material PropertiesRelate thermal diffusivity to thermal conductivity, mass density and specific heat capacity.Calculator · CalculateTorque, Angular Deflection & Rotational StiffnessFind rotational stiffness from positive torque and angular deflection in radians, including per-turn stiffness units.Calculator · CalculateTraveling Sine-Wave Displacement & PhaseEvaluate a traveling sinusoidal wave from amplitude, wavelength, position, speed, time and phase, with retained inverse branches.Calculator · CalculateTwo-Body Reduced Mass & Missing MassCalculate the reduced mass for two positive masses or infer one mass from the other and a valid reduced mass.Calculator · CalculateTwo-Piston Hydraulic Force, Pressure, Travel and WorkRelate two piston areas, forces, common applied pressure, travel distances and ideal mechanical work using selectable units.Calculator · CalculateTwo-Wave Frequency Difference & BeatsFind the nonnegative difference frequency between two waves or solve a higher-frequency inverse branch.Calculator · CalculateUniform Tensile True & Engineering Stress–StrainConvert positive engineering and true strain, with a constant-volume uniform tensile stress conversion.Calculator · CalculateUseful Energy & Input Efficiency PercentageCalculate useful output energy, input energy or conversion efficiency with consistent energy units and a bounded percentage.Calculator · CalculateVertical Free Fall: Height, Time & SpeedRelate vertical drop, elapsed time and arrival speed under constant gravity, including upward initial velocity.Calculator · CalculateVoltage Magnitude Ratio & Decibel TransferExpress a nonzero output-to-input voltage magnitude ratio as a linear ratio or logarithmic level.Calculator · CalculateVoltage Regulation with No-Load and Full-Load DenominatorsCalculate voltage regulation with no-load and full-load denominators using known measurements, selectable units and clear physical assumptions.Calculator · CalculateWatt-Hour Energy from Charge or Power & TimeCalculate energy in two independent ways: constant voltage times charge, or constant power times duration.Calculator · CalculateWatts, Kilowatts & Horsepower ConverterConvert power between watts, metric prefixes, mechanical horsepower, BTU per hour and other listed power units.Calculator · CalculateWave Frequency & Period by Medium SpeedCalculate cycles per second and time per cycle from wavelength and a custom or preset phase speed.Calculator · CalculateWave Frequency, Wavelength & Medium SpeedConvert frequency and wavelength using a selected reference wave speed or a custom positive speed.Calculator · CalculateWave Phase Speed & Medium ComparisonUse custom phase speed or fixed medium presets to relate frequency, wavelength and ordinary wavenumber.Calculator · CalculateWave Speed, Frequency, Wavelength & WavenumberRelate wave speed and frequency to wavelength and reciprocal wavelength, with medium presets and custom speed.Calculator · CalculateWave Speed, Period & Spatial FrequencySolve the relationship between wave speed, period, frequency, wavelength and ordinary spatial frequency.Calculator · CalculateWet-Basis Moisture, Dry Mass & Water MassCalculate water mass and wet-basis moisture percentage from wet and dried sample masses, including zero moisture.
Data & Calculators: Planning & Productivity
Layout / JSON / HTML · ConvertDashboard Layout ExporterDesign a dashboard grid and export its layout as JSON. Arrange widgets and save their types, positions and sizes.Project / CSV · ConvertLightweight Project PlannerTurn tasks, dates and dependencies into an editable project timeline, with milestones, progress and portable backups.Layout / JSON / HTML · ConvertPersonal Dashboard ArrangerMake a calm dashboard of clocks, notes, metrics and small data tables. Arrange every widget and keep an editable local backup.Project / CSV · ConvertPersonal Kanban BoardGive every task a place. Move cards between columns, add checklists and keep your board on your device.Project / CSV · ConvertRenovation Timeline PlannerLay out renovation phases, trades and milestones in one clear, printable timeline.Layout / JSON / HTML · ConvertStudy Dashboard BuilderGive your study day a little structure. Arrange focus timers, notes and assignment panels in a private, saved workspace.
Data & Calculators: Probability Distributions
Numbers · GenerateBernoulli Probability Table MakerShow the chance of failure and success for one trial.Numbers · GenerateBinomial Probability Table MakerMake the probability for every success count in repeated yes-or-no trials.Numbers · CalculateGamma Function CalculatorCalculate the gamma function for a positive number.Numbers · CalculateGaussian Error Function CalculatorFind the Gaussian error function for a chosen finite number.Numbers · CalculateInverse Error Function CalculatorFind the value whose Gaussian error function equals your input.Numbers · CalculateLog Gamma Function CalculatorFind the natural logarithm of the gamma function for a positive number.Numbers · GeneratePoisson Probability Table MakerMake a probability table for event counts around an average rate.Numbers · CalculateProbability Log-Odds CalculatorConvert a probability between 0 and 1 into its log-odds value.Numbers · CalculateStandard Logistic Cumulative ProbabilityFind the standard logistic probability at or below a chosen score.Numbers · CalculateStandard Normal Cumulative ProbabilityFind the standard normal probability at or below a chosen z-score.