Physics & Chemistry calculators
Motion, force, energy, molarity, gas laws, half-life and more.
103 free tools
Most used
Acceleration CalculatorFind acceleration from a change in speed, or from force and massAir Density CalculatorFind the density of humid air from temperature, pressure and humidityAngular Velocity CalculatorConvert RPM, rad/s and deg/s and find rim speed from radiusBoiling Point at Altitude CalculatorFind the temperature water boils at for your elevation or air pressureCarbon Dating CalculatorEstimate the age of organic material from its remaining carbon-14Chemical Equation BalancerBalance any chemical equation with the smallest whole-number coefficientsCollision CalculatorFinal velocities after elastic, inelastic or partly elastic 1-D collisionsDensity CalculatorSolve for density, mass or volume in any common unitDew Point CalculatorFind the dew point from temperature and humidity, or humidity from dew pointDilution CalculatorSolve C₁V₁ = C₂V₂ and see exactly how much stock and diluent to mixDrag Force CalculatorAir resistance in newtons and the power needed to push through itE=mc² CalculatorConvert mass to energy and energy to mass with Einstein's equationForce CalculatorUse Newton's second law F = ma to find force, mass or accelerationGrams to Moles CalculatorConvert grams ↔ moles ↔ particles for any chemical formulaHalf-Life CalculatorFind remaining amount, elapsed time or half-life for any exponential decayHeat Index CalculatorHow hot it really feels, using the National Weather Service formulaIdeal Gas Law CalculatorSolve PV = nRT for pressure, volume, moles or temperatureImpulse CalculatorImpulse from force and time, or from a change in momentumInclined Plane CalculatorForces, friction and acceleration for a block on a rampKinetic Energy CalculatorFind kinetic energy, mass or speed with KE = ½mv²Molar Mass CalculatorMolecular weight of any formula with an element-by-element breakdownMolarity CalculatorFind molarity, or the mass of solute needed to make a solutionMoment of Inertia CalculatorRotational inertia for common shapes, with the parallel axis theorempH CalculatorFind pH, pOH, [H⁺] and [OH⁻] for any solution, acid or basePhoton Energy CalculatorConvert wavelength or frequency into photon energy in eV and joulesProjectile Motion CalculatorRange, max height, flight time and trajectory from speed and angleRelative Humidity CalculatorGet relative humidity from temperature plus dew point or wet bulbSpeed Distance Time CalculatorSolve for speed, distance or travel time from the other twoTerminal Velocity CalculatorFind the top falling speed when drag balances weightTime Dilation CalculatorLorentz factor, time dilation and length contraction at any speedVelocity CalculatorSolve speed, distance or time — the other two do the restWet Bulb Temperature CalculatorEstimate wet-bulb temperature from air temperature and humidityWind Chill CalculatorSee how cold it really feels on exposed skin in wind
More physics & chemistry tools
Absolute Humidity CalculatorFind how many grams of water vapour each cubic metre of air holdsAltitude & Air Pressure CalculatorConvert altitude to air pressure and pressure back to altitudeBeaufort Scale ConverterTurn wind speed into Beaufort force, sea state and land signsBernoulli Equation CalculatorSolve pressure, velocity and height in a flowing fluidBoyle's Law CalculatorSolve P₁V₁ = P₂V₂ for any missing pressure or volumeCarnot Efficiency CalculatorFind the maximum possible efficiency of any heat engineCharles's Law CalculatorSolve V₁/T₁ = V₂/T₂ with automatic Kelvin conversionCombined Gas Law CalculatorSolve P₁V₁/T₁ = P₂V₂/T₂ for any missing pressure, volume or temperatureConservation of Energy CalculatorSolve final speed or height with KE + PE = constantCoulomb's Law CalculatorFind the electric force between two point chargesCritical Angle CalculatorFind the angle where total internal reflection beginsDensity Altitude CalculatorSee the altitude your aircraft actually “feels” todayDiffraction Grating CalculatorFind diffraction angles, orders and wavelengths with d sin θ = mλEfficiency CalculatorWork out energy efficiency, useful output or required inputFree Fall CalculatorHow long it takes to fall and how fast it hits the groundG-Force CalculatorConvert acceleration, turns and braking into g-forcesGravitational Force CalculatorNewton's law of gravitation for any two masses, from apples to planetsHeat Transfer CalculatorFind conductive heat flow through a wall, slab or rodHumidex CalculatorCanada’s “feels like” temperature from heat and humidityHydraulic Press CalculatorSee how Pascal’s principle turns a small push into a huge forceHydrostatic Pressure CalculatorFind the water or fluid pressure at any depth, gauge and absoluteInverse Square Law CalculatorSee how light, sound or radiation intensity falls off with distanceKinematics (SUVAT) CalculatorKnow any three of s, u, v, a, t? Get the other two instantlyLatent Heat CalculatorHeat needed to melt, freeze, boil or condense any amount of a substanceLever CalculatorBalance effort, load and arm lengths on any class of leverLightning Distance CalculatorCount the seconds from flash to thunder to see how far away the storm isMechanical Advantage CalculatorIdeal and actual mechanical advantage for all six simple machinesMechanical Power CalculatorPower from work and time, force and speed, torque and rpm, or liftingMirror Equation CalculatorImage distance, magnification and image type for concave and convex mirrorsMomentum CalculatorMomentum, impulse and elastic or inelastic collisions in one placeNewton's Law of Cooling CalculatorPredict how fast something cools or warms toward room temperaturePercent Yield CalculatorPercent yield from actual and theoretical yield — or work backwardsPotential Energy CalculatorFind gravitational potential energy (PE = mgh) on Earth or any planetPressure CalculatorFind pressure from force and area, or fluid pressure at any depthPulley System CalculatorEffort, rope tension and rope length for block-and-tackle pulley systemsSimple Harmonic Motion CalculatorPeriod, frequency, displacement, velocity and energy of an oscillatorSpecific Heat CalculatorSolve Q = mcΔT for heat energy, mass, specific heat or temperature changeSpeed of Sound CalculatorSpeed of sound in air at any temperature, in other gases and in solidsString Vibration Frequency CalculatorFundamental and harmonic frequencies of a vibrating stringTension CalculatorRope and cable tension for hanging, angled and pulley loadsTheoretical Yield CalculatorFind the maximum product mass from your limiting reactant and equationThermal Expansion CalculatorHow much a length or volume grows or shrinks with temperatureTorque CalculatorCompute torque from force, lever arm length and angle in N·m and lb·ftWavelength and Frequency CalculatorConvert wavelength ↔ frequency for light, radio and sound, with photon energyWien's Law CalculatorPeak blackbody wavelength from temperature, or temperature from peakAngular Momentum CalculatorAngular momentum of spinning objects and moving particles, with conservationBeat Frequency CalculatorBeats per second between two tones, and the unknown pitch from beatsBuoyancy CalculatorFind buoyant force with Archimedes’ principle and check if it floatsCentripetal Force CalculatorFind the force and acceleration needed to keep an object moving in a circleCloud Base CalculatorEstimate the height of cumulus cloud bases from temperature and dew pointDe Broglie Wavelength CalculatorMatter wavelength of electrons, neutrons, protons and everyday objectsDoppler Effect CalculatorFind the pitch you hear from a moving source or while you are movingDouble Slit Experiment CalculatorFringe spacing, fringe positions and wavelength for Young's double slitElectric Field CalculatorFind electric field strength and potential from charges or platesEntropy Change CalculatorFind ΔS for heating, melting, boiling and ideal-gas expansionEscape Velocity CalculatorFind how fast you must go to escape a planet, moon or star’s gravityFriction CalculatorFind friction force from the coefficient of friction on flat ground or a slopeHooke's Law CalculatorSolve F = kx for spring force, spring constant or extensionLensmaker's Equation CalculatorGet a lens’s focal length and power from its radii and refractive indexLimiting Reactant CalculatorFind the limiting reagent, theoretical yield and leftover excessMagnetic Force CalculatorLorentz force on a moving charge or a current-carrying wireMolality CalculatorMoles of solute per kilogram of solvent — plus freezing and boiling shiftsPendulum Period CalculatorFind the period, frequency or length of a simple pendulumPercent Composition CalculatorMass percent of every element in a compound, from its formulaRotational Kinematics CalculatorSolve angular displacement, velocity, acceleration and timeRotational Kinetic Energy CalculatorEnergy stored in a spinning flywheel, wheel or rotor: KE = ½Iω²Snell's Law CalculatorFind refraction angles, refractive index and the critical angleStefan-Boltzmann Law CalculatorRadiated power from temperature, emissivity and area: P = εσAT⁴Thin Lens Equation CalculatorSolve 1/f = 1/dₒ + 1/dᵢ and see where and how big the image isWork and Power Calculator (Physics)Work done from force, distance and angle — plus power from time