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 Calculator
Calculate displacement, velocity, acceleration, and time using constant acceleration equations.
mechanicsProjectile Motion Calculator
Calculate range, height, time of flight, and velocity components for projectile motion.
mechanicsAcceleration Calculator
Calculate acceleration, final velocity, initial velocity, and time using constant acceleration equations.
mechanicsIdeal Gas Law (PV = nRT)
Calculate pressure, volume, temperature, or moles using the ideal gas law.
thermoThermal Expansion Calculator
Calculate linear, area, and volume expansion of solids and liquids with temperature change.
thermoCoulomb's Law (Electric Force)
Calculate electrostatic force between two charges using Coulomb's law.
electromagOhm's Law (V = IR)
Calculate voltage, current, resistance, or power in DC circuits.
electromagSnell's Law (Refraction)
Calculate angle of refraction, critical angle, and refractive index using Snell's law.
opticsDoppler Effect Calculator
Calculate apparent frequency and wavelength for moving source and observer.
wavesBeat Frequency Calculator
Calculate beat frequency from two interfering sound waves with similar frequencies.
wavesPhotoelectric Effect
Calculate kinetic energy, stopping potential, and threshold frequency for photoelectric emission.
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.
quantumTime Dilation Calculator
Calculate time dilation for moving observers using Lorentz factor.
relativityLength Contraction Calculator
Calculate length contraction for objects moving at relativistic speeds.
relativityLorentz Transformation
Transform coordinates and time between inertial frames moving at constant velocity.
relativitySchwarzschild Radius
Calculate Schwarzschild radius (event horizon) for a given mass.
relativityRadioactive Decay (Half-Life)
Calculate remaining activity, number of nuclei, and half-life for radioactive decay.
nuclearCarbon-14 Dating
Estimate age of organic samples using carbon-14 dating and known decay rate.
nuclearContinuity Equation
Calculate flow rate, velocity, and cross-sectional area in fluid flow systems.
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 — 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 — 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.
❓ 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=mc²), 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.