Physics and Engineering
Physics and engineering calculators online — fast and precise computations: velocity, acceleration, force, work, energy, heat. Formulas, units, step-by-step help.
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Acceleration Calculator
Acceleration Calculator Calculate acceleration using velocity change over time. Supports metric (m/s
Antenna Length Calculator
Antenna Length Calculator Calculate optimal antenna lengths for amateur radio, WiFi, or other RF app
Battery Life Calculator
Battery Life Calculator Calculate how long your battery will last based on its capacity and load cur
Beam Bending Stress Calculator
Beam Bending Stress Calculator Calculate bending stress in beams using the fundamental flexure formu
Belt Length Calculator
Belt Length Calculator Calculate belt length for two pulleys using center distance and pulley diamet
Bohr Model Calculator Energy Levels
Bohr Model Energy Levels Calculator Calculate electron energy levels and transitions for hydrogen-li
Boyles Law Calculator
Boyle's Law Calculator Calculate pressure-volume relationships for ideal gases at constant temperatu
Capacitance Calculator
Capacitance Calculator Calculate parallel-plate capacitance for electronics projects and circuit des
Capacitor Energy Calculator
Capacitor Energy Calculator Calculate stored energy in capacitors for electronics projects and circu
Centripetal Force Calculator
Centripetal Force Calculator Calculate the force required to keep an object moving in a circular pat
Combined Gas Law Calculator
Combined Gas Law Calculator Calculate relationships between pressure, volume, and temperature for id
Coulombs Law Calculator Electric Force
Coulomb's Law Calculator Calculate electrostatic force between two point charges. Supports metric un
Current Divider Calculator
Current Divider Calculator Calculate current through parallel resistors in DC circuits. Essential fo
De Broglie Wavelength Calculator
De Broglie Wavelength Calculator Calculate the quantum wavelength of particles using momentum or kin
Decibel Calculator dB
Decibel (dB) Calculator Calculate sound intensity ratios and power ratios using logarithmic decibel
Dew Point Calculator
Dew Point Calculator Calculate the temperature at which air becomes saturated with water vapor. Esse
Dimensional Analysis Calculator
Dimensional Analysis Calculator Convert between measurement units using dimensional analysis. Ideal
Drag Force Calculator
Drag Force Calculator Calculate the drag force exerted on objects moving through fluids. Supports bo
Electric Field Calculator
Electric Field Calculator Calculate electric field strength from point charges. Perfect for students
Energy Consumption Calculator kWh
Energy Consumption Calculator Calculate electrical energy usage in kilowatt-hours (kWh) for applianc
Engine Horsepower Calculator
Engine Horsepower Calculator Calculate engine horsepower from torque and RPM. Supports both metric (
Entropy Calculator
Entropy Calculator Calculate Shannon entropy for discrete probability distributions. Essential for i
Equivalent Resistance Calculator
Equivalent Resistance Calculator Calculate equivalent resistance for series and parallel circuits. E
Escape Velocity Calculator
Escape Velocity Calculator Calculate the minimum speed needed to escape a celestial body's gravitati
Faradays Law Calculator Electromagnetic Induction
Faraday's Law Calculator Calculate induced electromotive force (EMF) from magnetic flux changes. Ess
Flow Rate Calculator Volumetric And Mass
Flow Rate Calculator Calculate volumetric and mass flow rates for fluids. Convert between common uni
Friction Calculator
Friction Calculator Calculate frictional force between surfaces using coefficient of friction and no
Gear Ratio Calculator
Gear Ratio Calculator Calculate gear ratios, output speeds, and mechanical advantages for gear syste
Gearbox Ratio Calculator For Vehicles
Gearbox Ratio Calculator Calculate overall gear ratios for vehicles. Essential for mechanics, engine
Gravitational Force Calculator
Gravitational Force Calculator Calculate the gravitational force between two objects using Newton's
Half Life Calculator
Half-Life Calculator Calculate remaining substance, elapsed time, or half-life duration for radioact
Heat Sink Size Calculator
Heat Sink Size Calculator Calculate required heat sink thermal resistance and volume for electronic
Inclined Plane Calculator
Inclined Plane Calculator Calculate forces, mechanical advantage, and work on inclined planes. Essen
LED Resistor Calculator
LED Resistor Calculator Calculate the perfect current-limiting resistor for your LED circuit. Suppor
Laser Beam Divergence Calculator
Laser Beam Divergence Calculator Calculate laser beam divergence for optics, laser cutting, or align
Latent Heat Calculator
Latent Heat Calculator Calculate the energy required for phase changes in substances. Supports water
Lens Maker Equation Calculator
Lens Maker Equation Calculator Calculate focal length of lenses using optical geometry and material
Mach Number Calculator
Mach Number Calculator Calculate Mach number for aviation and aerodynamics. Supports both metric (m/
Magnetic Field Calculator
Magnetic Field Calculator Calculate magnetic field strength for solenoids and straight wires using s
Magnification Calculator
Magnification Calculator Calculate optical magnification for microscopy, photography, and astronomy.
Material Weight Calculator By Volume
Material Weight Calculator By Volume Calculate material weight from volume measurements for construc
Motor RPM Calculator
Motor RPM Calculator Calculate motor RPM from frequency and pole count for AC induction motors. Esse
Motor Torque Calculator
Motor Torque Calculator Calculate torque requirements for electric motors. Supports metric (N·m) and
Newtons Second Law Calculator Force Mass Acceleration
Newton's Second Law Calculator Calculate force, mass, or acceleration using F = m × a. Supports Metr
Number Base Converter
Number Base Converter Convert numbers between binary, decimal, hexadecimal, octal and other bases (2
Ohms Law Calculator Voltage Current Resistance
Ohm's Law Calculator Calculate voltage, current, or resistance using Ohm's Law (V = I × R). Essentia
Orbital Velocity Calculator
Orbital Velocity Calculator Calculate the speed required for an object to maintain a stable orbit ar
Photon Energy Calculator E Equals h f
Photon Energy Calculator Calculate photon energy using Planck's equation E = h·f. Essential for phys
Pipe Size Calculator
Pipe Size Calculator Determine optimal pipe diameter for water systems based on flow rate and veloci
Poissons Ratio Calculator
Poisson's Ratio Calculator Calculate Poisson's Ratio (ν) from axial and transverse strain measuremen
Power Calculator
Power Calculator Calculate electrical power using voltage and current, or explore alternative formul
Pressure Calculator
Pressure Calculator Convert between pressure units (Pa, kPa, MPa, bar, atm, psi, Torr) using NIST-st
RF Wavelength Calculator
RF Wavelength Calculator Calculate the wavelength of radio frequency signals. Essential for antenna
Reynolds Number Calculator Laminar And Turbulent Flow
Reynolds Number Calculator Determine fluid flow characteristics (laminar, transitional, or turbulent
Roof Pitch Calculator
Roof Pitch Calculator Calculate roof pitch ratios, angles, and grades for roofing projects. Essentia
Room Mode Calculator
Room Mode Calculator Calculate resonant frequencies in rectangular rooms for optimal acoustic treatm
Significant Figures Calculator
Significant Figures Calculator Count significant digits in numbers or round values to specified sign
Snells Law Calculator Refraction
Snell's Law Calculator Calculate refraction angles and indices of refraction for light passing betwe
Solenoid Magnetic Field Calculator
Solenoid Magnetic Field Calculator Calculate magnetic field strength inside a solenoid. Input curren
Sound Wavelength Calculator
# Sound Wavelength Calculator ```html Sound Wavelength Calculator Calculate the wavelength of sound
Specific Heat Capacity Calculator
Specific Heat Capacity Calculator Calculate heat energy, temperature changes, or material properties
Spring Constant Calculator
Spring Constant Calculator Calculate spring stiffness (k) using Hooke's Law for mechanical engineers
Spring Force Calculator Hookes Law
Spring Force Calculator Calculate spring force using Hooke's Law (F = -k·x). Input spring constant a
Strain Calculator Epsilon Equals Delta L Over L
Strain Calculator Calculate material strain (ε) using the formula ε = ΔL / L. Essential for engineer
Thin Lens Equation Calculator
Thin Lens Equation Calculator Calculate focal length, object distance, or image distance using the t
Torricellis Law Calculator Flow From A Tank
Torricelli's Law Calculator: Flow From A Tank Calculate fluid flow velocity and discharge rate from
Truss Analysis Calculator
Truss Analysis Calculator Determine forces in truss members using the method of joints. Input joint
Unit Converter
Speed Conversion Convert between common speed units (m/s, km/h, mph, knots) with precise NIST-standa
Work Calculator
Work Calculator Calculate mechanical work done (in joules) using force and distance. Supports metric