Physics Calculators

Browse 53 free physics tools. All tools are free, instant, and require no signup.

Solve physics problems with calculators for mechanics, thermodynamics, electricity, optics, and relativity. Calculate force, energy, momentum, and wave properties.

All Physics Tools

• Acceleration Calculator - Calculate the rate of change of velocity over a specific time interval.
• Angular Acceleration Calculator - Calculate angular acceleration from change in angular velocity over time. Convert between rad/s², degrees/s², and RPM/s.
• Angular Velocity Calculator - Calculate angular velocity in rad/s, RPM, or degrees/s from rotational data or convert between angular velocity units
• Aquarium Glass Thickness Calculator - Calculate the minimum safe glass thickness for a DIY aquarium based on dimensions and safety factor
• Audio Delay to Distance Calculator - Calculate delay in milliseconds for live event delay towers based on distance from stage
• Battery Pack Builder Calculator - Design custom battery packs with 18650/21700 cells — input voltage and amp-hours, get series/parallel config
• Biot Number Calculator - Calculate and analyze Biot numbers for heat transfer analysis with visual regime indicators
• Car Audio Power Wire Sizing Calculator - Calculate required wire gauge (AWG) for car amplifiers based on watts and cable length
• Carburetor CFM Calculator - Calculate required carburetor airflow (CFM) based on engine displacement, RPM, and volumetric efficiency.
• Centrifugal Force Calculator - Calculate the apparent outward force on an object moving in a circular path. Compute centrifugal force from mass, velocity, and radius.
• Centripetal Force Calculator - Calculate centripetal force required for circular motion using mass, velocity, and radius (F = mv²/r)
• Coefficient of Friction Calculator - Calculate static and kinetic coefficients of friction from force measurements. Includes common material friction values for engineering applications.
• Compression Ratio Calculator - Calculate engine static compression ratio using bore, stroke, and combustion chamber volumes.
• Coulomb Converters - Convert electric charge between coulombs and related units
• Coulomb's Law Calculator - Calculate electric force, charge, or distance between two point charges using Coulomb's Law (F = k|q1q2|/r^2)
• Displacement Calculator - Calculate displacement, velocity, acceleration, or time using kinematic equations of motion
• E-Bike Range Estimator - Estimate riding range from battery capacity, motor wattage, speed, and rider weight
• Electric Vehicle Charging Time Calculator - Calculate how long it takes to charge an electric vehicle based on battery capacity, current charge level, target charge level, and charger power
• Electron Charge Converters - Convert between different units of electric charge (coulombs, electrons, elementary charge, ampere-hours)
• Electronvolt Converter - Convert electronvolts (eV) to joules, calories, and other energy units commonly used in physics and chemistry
• Engine Compression Ratio Calculator - Calculate engine compression ratio from cylinder bore, stroke, combustion chamber volume, and head gasket specifications. Essential for engine builders and tuners.
• Engine Displacement Calculator - Determines total engine displacement (Liters, CC, CID) based on bore, stroke, and cylinder count.
• Engine Horsepower Calculator - Calculate horsepower from torque and RPM measurements.
• Engine Torque Calculator - Calculate torque output from horsepower and RPM measurements.
• EV Charging Time Calculator - Estimate the time required to charge an electric vehicle battery based on current level and charger power.
• Force Calculator - Calculate net force using Newton's Second Law (F = m × a).
• Frequency Calculator - Convert between wave period and frequency or calculate frequency from velocity and wavelength.
• Friction Force Calculator - Calculate static and kinetic friction forces using the coefficient of friction and normal force (f = μN)
• Fuel Flow Converter - Convert fuel injector flow rates between lbs/hr and cc/min for gasoline engines.
• Gear Ratio Calculator - Calculate engine RPM at a given speed after changing differential or transmission gear ratios
• Gravitational Force Calculator - Calculate gravitational force between two masses using Newton's Law of Universal Gravitation (F = Gm₁m₂/r²)
• Kiloelectronvolt Converter - Convert kiloelectronvolt (keV) to other energy units, wavelength, and frequency. Essential for physics and X-ray calculations.
• Kilograms to Newtons Converter - Convert mass (kg) to force (N) using gravitational acceleration
• Kinetic Energy Calculator - Determine the energy an object possesses due to its motion (KE = 0.5 × m × v²).
• lb/hr to cc/min Converter - Convert fuel injector flow rates between pounds per hour (lb/hr) and cubic centimeters per minute (cc/min). Essential for injector sizing and fuel system tuning.
• LED Strip Power Injection Calculator - Calculate whether your LED strip run needs power injection to prevent voltage drop and color shift
• Magnitude of Acceleration Calculator - Calculate the magnitude of acceleration from velocity change and time, force and mass, or x and y components
• Mass Calculator - Calculate mass from density and volume, or solve for any variable using the mass-density-volume relationship
• Megaelectronvolt Converters - Convert megaelectronvolts (MeV) to and from energy, mass, wavelength, frequency, and temperature units for particle physics and nuclear science
• Momentum Calculator - Calculate linear momentum, mass, velocity, or impulse using p = mv and J = FΔt
• Motorcycle Lean Angle Calculator - Calculate theoretical lean angle for a corner at a given speed and radius
• Net Force Calculator - Calculate the net (resultant) force from multiple forces with different magnitudes and directions using vector addition
• Normal Force Calculator - Calculate the normal force on an object on a flat or inclined surface, including effects of applied forces
• Ohm’s Law Calculator - Calculate Voltage, Current, or Resistance using Ohm's Law (V = I × R).
• PCB Trace Width Calculator - Calculate required circuit board trace width to handle a specific current per IPC-2221
• Potential Energy Calculator - Calculate the gravitational potential energy of an object based on mass, gravity, and height.
• Power Calculator - Calculate mechanical or electrical power by solving for work over time.
• Pressure Calculator - Determine the amount of force applied over a specific area (P = F / A).
• Spring Constant Calculator - Calculate spring constant (stiffness) using Hooke's Law. Find k from force and displacement, or solve for force or displacement.
• Stepper Motor Torque Calculator - Choose the right stepper motor size based on load, acceleration, and lead screw pitch
• Terminal Velocity Calculator - Calculate terminal velocity of a falling object based on mass, drag coefficient, air density, and cross-sectional area.
• Velocity Calculator - Calculate speed and direction by solving for distance over time with various unit supports.
• Wavelength Calculator - Calculate the wavelength of a wave based on its frequency and velocity (λ = v / f).