Physics Calculators
Browse our comprehensive collection of physics calculators for mechanics, thermodynamics, electromagnetism, optics, waves, quantum, relativity, nuclear physics, and more. Free online tools for students, educators, researchers, and professionals.
Kinematic Equations Solver
Solve displacement, velocity, acceleration, and time using constant acceleration equations.
mechanicsNewton's Second Law (F = ma)
Calculate force, mass, or acceleration using Newton's second law of motion.
mechanicsWork, Energy & Power Calculator
Calculate work done, kinetic energy, potential energy, and power in mechanical systems.
mechanicsMomentum & Impulse Calculator
Calculate momentum, impulse, and collisions with conservation of momentum.
mechanicsProjectile Motion Calculator
Calculate range, height, time of flight, and velocity components for projectile motion.
mechanicsCircular Motion Calculator
Calculate centripetal acceleration, force, and period for uniform circular motion.
mechanicsTorque & Rotational Dynamics
Calculate torque, moment of inertia, angular acceleration, and rotational kinetic energy.
mechanicsSimple Harmonic Motion (SHM)
Calculate period, frequency, displacement, velocity, and acceleration for spring-mass and pendulum.
mechanicsIdeal Gas Law (PV = nRT)
Calculate pressure, volume, temperature, or moles using the ideal gas law.
thermoHeat Transfer & Specific Heat
Calculate heat (Q) using specific heat capacity, mass, and temperature change.
thermoThermal Expansion Calculator
Calculate linear, area, and volume expansion of solids and liquids with temperature change.
thermoHeat Engine Efficiency
Calculate thermal efficiency of Carnot, Otto, and other heat engines.
thermoEntropy & Second Law
Calculate entropy change for heat transfer and reversible processes.
thermoPhase Change & Latent Heat
Calculate heat required for phase changes (melting, vaporization) and latent heat.
thermoKinetic Theory of Gases
Calculate root-mean-square speed, average kinetic energy, and pressure from molecular properties.
thermoThermodynamic Cycles
Analyze Carnot, Rankine, Brayton, and refrigeration cycles with P-V and T-S diagrams.
thermoCoulomb's Law (Electric Force)
Calculate electrostatic force between two charges using Coulomb's law.
electromagElectric Field & Potential
Calculate electric field strength and electric potential for point charges and configurations.
electromagOhm's Law (V = IR)
Calculate voltage, current, resistance, or power in DC circuits.
electromagSeries & Parallel Circuits
Calculate equivalent resistance, current, and voltage in series/parallel resistor networks.
electromagMagnetic Force & Field
Calculate magnetic force on moving charges, current-carrying wires, and fields from solenoids.
electromagFaraday's Law & Induction
Calculate induced emf, magnetic flux, and Lenz's law for changing magnetic fields.
electromagAC Circuits (RLC)
Calculate impedance, phase angle, resonance frequency, and power in AC circuits.
electromagMaxwell's Equations Solver
Solve basic problems involving Gauss's law, Ampere's law, and Faraday's law.
electromagSnell's Law (Refraction)
Calculate angle of refraction, critical angle, and refractive index using Snell's law.
opticsLensmaker's Equation
Calculate focal length, lens power, and image distance for thin lenses.
opticsMirror Equation
Calculate focal length, object/image distances, and magnification for spherical mirrors.
opticsDiffraction & Interference
Calculate fringe spacing, diffraction angle, and interference patterns for double-slit and gratings.
opticsPolarization of Light
Calculate Malus's law intensity, Brewster's angle, and polarization by reflection.
opticsOptical Power & Magnification
Calculate magnifying power of lenses, microscopes, and telescopes.
opticsSpeed of Light in Medium
Calculate speed of light, wavelength, and frequency in different media.
opticsRainbow & Dispersion Calculator
Calculate dispersion angles for visible light through prisms.
opticsWave Speed & Frequency
Calculate wave speed, frequency, wavelength, and period for mechanical and electromagnetic waves.
wavesDoppler Effect Calculator
Calculate apparent frequency and wavelength for moving source and observer.
wavesSound Intensity & Decibels
Calculate sound intensity, intensity level (dB), and compare sound levels.
wavesResonance & Standing Waves
Calculate harmonic frequencies for strings, pipes, and standing wave patterns.
wavesWave Interference & Superposition
Combine waves and calculate resultant amplitude, phase, and constructive/destructive interference.
wavesSpeed of Sound in Media
Calculate speed of sound in air, water, and other materials based on temperature and properties.
wavesBeat Frequency Calculator
Calculate beat frequency from two interfering sound waves with similar frequencies.
wavesElectromagnetic Spectrum
Convert between frequency, wavelength, and photon energy for EM radiation.
wavesPhotoelectric Effect
Calculate kinetic energy, stopping potential, and threshold frequency for photoelectric emission.
quantumBohr Model (Hydrogen)
Calculate energy levels, electron velocity, and radius for hydrogen atom.
quantumde Broglie Wavelength
Calculate de Broglie wavelength for particles with mass and momentum.
quantumHeisenberg Uncertainty Principle
Calculate uncertainty in position and momentum for quantum particles.
quantumSchrΓΆdinger Equation (1D)
Solve time-independent SchrΓΆdinger equation for infinite potential well and harmonic oscillator.
quantumQuantum Tunneling
Calculate tunneling probability through a potential barrier.
quantumSpin & Magnetic Moment
Calculate spin angular momentum, magnetic moment, and spin states for electrons.
quantumPhoton Energy & Wavelength
Convert between photon energy, frequency, and wavelength using E = hν and c = λν.
quantumTime Dilation Calculator
Calculate time dilation for moving observers using Lorentz factor.
relativityLength Contraction Calculator
Calculate length contraction for objects moving at relativistic speeds.
relativityRelativistic Mass & Energy
Calculate relativistic mass, total energy, rest energy, and kinetic energy using E = mcΒ².
relativityLorentz Transformation
Transform coordinates and time between inertial frames moving at constant velocity.
relativityRelativistic Velocity Addition
Add velocities in special relativity using the relativistic velocity addition formula.
relativityGravitational Time Dilation
Calculate time dilation due to gravitational fields (Schwarzschild metric).
relativitySchwarzschild Radius
Calculate Schwarzschild radius (event horizon) for a given mass.
relativityFour-Vector & Invariant Mass
Calculate invariant mass, momentum-energy 4-vector, and velocity transformations.
relativityRadioactive Decay (Half-Life)
Calculate remaining activity, number of nuclei, and half-life for radioactive decay.
nuclearNuclear Binding Energy
Calculate mass defect and binding energy per nucleon for atomic nuclei.
nuclearCarbon-14 Dating
Estimate age of organic samples using carbon-14 dating and known decay rate.
nuclearQ-Value of Nuclear Reactions
Calculate energy released (Q-value) in nuclear reactions from mass defect.
nuclearRadiation Dose & Shielding
Calculate absorbed dose, dose equivalent, and shielding requirements.
nuclearFission & Fusion Energy
Calculate energy released in nuclear fission and fusion reactions.
nuclearDecay Chain Simulator
Simulate radioactive decay chains and visualize parent-daughter relationships.
nuclearRadioactive Isotope Half-Lives
Look up half-lives and decay constants for common isotopes.
nuclearBernoulli's Equation
Solve fluid flow problems using Bernoulli's equation with pressure, velocity, and elevation.
fluidsPascal's Principle (Hydraulics)
Calculate force multiplication in hydraulic systems using Pascal's principle.
fluidsArchimedes' Principle (Buoyancy)
Calculate buoyant force, displaced volume, and apparent weight in fluids.
fluidsFluid Pressure & Depth
Calculate hydrostatic pressure at depth in fluids and gauge pressure.
fluidsContinuity Equation
Calculate flow rate, velocity, and cross-sectional area in fluid flow systems.
fluidsViscosity & Reynolds Number
Calculate dynamic viscosity, kinematic viscosity, and Reynolds number for fluid flow.
fluidsTorricelli's Law (Efflux)
Calculate exit velocity and flow rate of fluid from a tank orifice.
fluidsSurface Tension & Capillarity
Calculate capillary rise, surface tension, and contact angle in liquids.
fluidsWhat Are Physics Calculators?
Our Physics Calculators collection provides a comprehensive suite of tools for solving problems across all major branches of physics. Whether you're studying mechanics, thermodynamics, electromagnetism, optics, waves, quantum physics, relativity, or nuclear physics, these calculators deliver accurate results with clear, step-by-step explanations.
From kinematics and dynamics to quantum mechanics and general relativity, our tools cover the full spectrum of physics education, research, and professional application.
How to Use This Directory
- Search: Type a keyword into the search bar to find specific calculators by name or description.
- Filter by Category: Use the dropdown to narrow down to a specific physics topic β each option shows the number of tools available.
- Click to Use: Each card links directly to the tool. Click on any card to start your physics calculation instantly.
- Explore Category Pages: Use the "Explore More Science & Engineering Calculators" section to access dedicated pages for other science and engineering topics.
Why Use Our Physics Calculators?
- Comprehensive Coverage: Covers mechanics, thermodynamics, electromagnetism, optics, waves, quantum, relativity, nuclear, and fluid mechanics.
- Accurate & Reliable: Uses validated physical constants and formulas (SI units).
- Free & Accessible: No registration, no fees β use any tool instantly on any device.
- Educational: Many tools show the formulas and principles behind the calculations.
- Professional & Student Friendly: Designed for physicists, engineers, educators, and students.
β Physics Calculators FAQ
What types of physics calculations can I perform?
You can perform calculations in mechanics (kinematics, dynamics, energy, momentum, circular motion), thermodynamics (ideal gas, heat, entropy, engines), electromagnetism (Coulomb's law, circuits, magnetic fields, induction), optics (refraction, lenses, diffraction), waves (speed, Doppler, interference), quantum physics (photoelectric effect, Bohr model, uncertainty), relativity (time dilation, length contraction, E=mcΒ²), nuclear physics (decay, binding energy, fission/fusion), and fluid mechanics (Bernoulli, buoyancy, viscosity).
How do I solve kinematic equations?
Use our Kinematic Equations Solver. Enter any three known variables (displacement, initial velocity, final velocity, acceleration, time) and the tool will solve for the missing ones.
How do I calculate the ideal gas law?
Use our Ideal Gas Law Calculator. Enter any three of pressure, volume, number of moles, and temperature, and the tool will compute the fourth using PV = nRT.
How do I calculate electric field from point charges?
Use our Electric Field & Potential calculator. Enter charge values and distances to compute electric field strength and potential using Coulomb's law and superposition.
How do I calculate lens focal length?
Use our Lensmaker's Equation. Enter the radii of curvature and refractive index of the lens material to calculate focal length.
How do I compute the Doppler effect?
Use our Doppler Effect Calculator. Enter the source and observer speeds, and the emitted frequency to get the observed frequency for sound or light.
How do I calculate time dilation?
Use our Time Dilation Calculator. Enter the relative velocity (as a fraction of c) and proper time to get the dilated time.
Are these calculators suitable for professional research?
Yes, our calculators use accurate physical constants and formulas, making them suitable for research, education, and engineering applications.
How often are new physics calculators added?
We regularly add new calculators based on user requests and emerging physics topics. If you have a suggestion, please contact us.
Can I use these calculators for exam preparation and homework?
Absolutely. These calculators are ideal for students to check their work, understand problem-solving steps, and prepare for exams.