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Calculate force, mass, and acceleration instantly using Newton's Second Law (F = ma). Perfect for physics students, engineers, and anyone solving mechanics problems.

Calculate weight, mass, or gravitational acceleration instantly using the formula W = mg. Perfect for physics students, engineers, and anyone solving gravity-related problems on Earth or other planets.

Calculate mass, force, or acceleration instantly using Newton's Second Law (m = F/a). Perfect for physics students, engineers, and anyone solving mechanics problems involving mass.

Calculate acceleration, force, or mass instantly using Newton's Second Law (a = F/m). Perfect for physics students, engineers, and anyone solving motion problems involving acceleration.

Calculate velocity, distance, or time instantly using the formula v = d/t. Perfect for physics students, engineers, and anyone solving motion problems involving speed and velocity.

Calculate speed, distance, or time instantly using the formula s = d/t. Perfect for physics students, engineers, and anyone solving motion problems involving speed.

Calculate distance, velocity, or time instantly using the formula d = v × t. Perfect for physics students solving motion problems involving distance traveled.

Calculate time, distance, or velocity instantly using the formula t = d/v. Perfect for physics students solving motion problems involving time taken to travel a distance.

Calculate work, force, or displacement instantly using the formula W = F × d. Perfect for physics students and engineers solving problems involving mechanical work and energy transfer.

Calculate power, work, or time instantly using the formula P = W/t. Perfect for physics students and engineers solving problems involving mechanical and electrical power.

Calculate kinetic energy, mass, or velocity instantly using the formula KE = ½mv². Perfect for physics students and engineers solving problems involving moving objects and energy.

Calculate potential energy, mass, height, or gravitational acceleration instantly using the formula PE = mgh. Perfect for physics students solving problems involving gravitational potential energy.

Calculate momentum, mass, or velocity instantly using the formula p = m × v. Perfect for physics students and engineers solving problems involving moving objects and collisions.

Calculate impulse, force, or time instantly using the formula J = F × Δt. Perfect for physics students and engineers solving problems involving collisions, momentum change, and impact forces.

Calculate friction force for both static and kinetic friction. Static friction: f_s ≤ μₛN (maximum), Kinetic friction: f_k = μₖN. Perfect for physics students solving problems involving sliding motion, surface resistance, and impending motion.

Calculate normal force for different scenarios: Horizontal Surface (N = mg), Inclined Plane (N = mg cosθ), Vertical Wall (N = applied horizontal force), and Accelerating Lift (N = m(g ± a)). Perfect for physics students solving contact force problems.

Calculate coefficient of friction for static (μₛ) and kinetic (μₖ) friction using the formula μ = f/N. Perfect for physics students solving problems involving friction force, normal force, and surface interactions.

Calculate torque using the formula τ = F × r × sinθ. Perfect for physics students and engineers solving rotational motion problems involving force, lever arm distance, and angle.

Calculate gravitational acceleration using two methods: from weight and mass (g = W/m) or from universal gravitation (g = GM/r²). Perfect for physics students exploring gravity on Earth, Moon, planets, or custom celestial bodies.

Complete free fall calculations with initial velocity support. Calculate height (h = ut + ½gt²), final velocity (v = u + gt), velocity from height (v² = u² + 2gh), or time to fall (t = √(2h/g)). Perfect for physics students solving projectile and falling object problems.

Calculate terminal velocity using vₜ = √(2mg / ρAC_d). Perfect for physics students and skydivers exploring falling object dynamics, fluid resistance, and maximum descent speed.

Calculate spring force (F = kx), spring constant (k = F/x), displacement (x = F/k), or elastic potential energy (U = ½kx²) using Hooke's Law. Perfect for physics students and engineers working with springs and elastic materials.

Calculate efficiency (η = Output/Input), output power (Output = η × Input), or input power (Input = Output / η). Perfect for physics students and engineers analyzing system performance, energy conversion, and power efficiency.

Calculate initial velocity using kinematic equations. Choose from v₀ = v - at (from time) or v₀ = √(v² - 2as) (from distance). Perfect for physics students solving motion problems involving acceleration, time, and distance.

Calculate final velocity using kinematic equations: v = u + at (from time) or v² = u² + 2as (from distance). Perfect for physics students solving motion problems with constant acceleration.

Calculate displacement using kinematic equations: s = ut + ½at² (from time), s = ½(u + v)t (from velocities), or s = vt - ½at² (from final velocity). Perfect for physics students solving motion problems.

Calculate acceleration using kinematic equations: a = (v - u)/t (from time), a = (v² - u²)/2s (from distance), or a = Δv/t (from velocity change). Perfect for physics students solving motion problems.

Calculate stopping distance using friction coefficient method: d = v²/2μg. Compute thinking distance (d = v × t), braking distance (d = v²/2μg), or total stopping distance. Perfect for driving safety analysis, accident reconstruction, and physics students studying vehicle motion.

Calculate projectile range using the formula R = u²sin(2θ)/g. Compute horizontal distance, initial velocity, or launch angle for projectile motion problems. Perfect for physics students studying ballistics and projectile trajectories.

Calculate projectile maximum height using H = u²sin²θ/2g. Compute maximum height from initial velocity and launch angle, find initial velocity from height and angle, or determine launch angle from height and velocity. Perfect for physics students studying projectile trajectories.

Calculate projectile time of flight using T = 2u sinθ/g. Compute total flight time from initial velocity and launch angle, find initial velocity from time and angle, or determine launch angle from time and velocity. Perfect for physics students studying projectile trajectories.

Calculate projectile velocity components and resultant velocity. Compute horizontal velocity (vx = v cosθ), vertical velocity (vy = v sinθ - gt), resultant velocity (v = √(vx² + vy²)), or velocity at a given time. Perfect for physics students analyzing projectile motion at any point in trajectory.

Calculate horizontal projectile motion parameters. Compute range (R = v × √(2h/g)), time of flight (t = √(2h/g)), initial velocity (v = R / √(2h/g)), or height (h = ½gt²). Perfect for physics students analyzing projectiles launched horizontally from a height.

Calculate centripetal force using F = mv²/r. Compute centripetal force from mass, velocity, and radius, or find mass, velocity, or radius when other parameters are known. Perfect for physics students studying circular motion and rotational dynamics.

Calculate centripetal acceleration using a = v²/r. Compute centripetal acceleration from velocity and radius, or find velocity (v = √(a×r)) or radius (r = v²/a). Perfect for physics students studying circular motion and rotational dynamics.

Calculate circular velocity using v = 2πr/T. Compute orbital velocity from radius and period, find radius from velocity and period, or calculate orbital period from radius and velocity. Perfect for physics students studying circular motion, satellites, and planetary orbits.

Calculate angular velocity using ω = v/r. Compute angular velocity from linear velocity and radius, find linear velocity (v = ω × r), or calculate radius (r = v/ω). Perfect for physics students studying rotational motion, wheels, gears, and circular dynamics.

Calculate angular acceleration using α = Δω/Δt. Compute angular acceleration from change in angular velocity over time, find final angular velocity (ω₂ = ω₁ + αt), initial angular velocity (ω₁ = ω₂ - αt), or time (t = Δω/α). Perfect for physics students studying rotational dynamics and spinning objects.

Calculate orbital velocity using v = √(GM/r). Compute orbital velocity from central mass and orbital radius, find orbital radius (r = GM/v²), or calculate central mass (M = v²r/G). Perfect for physics and astronomy students studying satellite orbits, planetary motion, and celestial mechanics.

Calculate total mechanical energy using ME = KE + PE = ½mv² + mgh. Compute total mechanical energy, find velocity from kinetic energy, calculate height from potential energy, or determine mass from energy equations. Perfect for physics students studying energy conservation and mechanical systems.

Calculate specific mechanical energy using e = v²/2 + gh. Compute specific energy (energy per unit mass) from velocity and height, find velocity from specific energy and height, or calculate height from specific energy and velocity. Perfect for physics and engineering students studying fluid mechanics, orbital mechanics, and energy conservation.

Convert between 10+ energy units including Joules, Calories, Kilowatt-hours, Electronvolts, BTUs, and Foot-pounds. Perfect for physics students, engineers, and anyone working with energy measurements across different unit systems.

Calculate work, velocity, or mass using the Work-Energy Theorem: W = ΔKE = ½mv₂² - ½mv₁². Compute work done from change in kinetic energy, find final velocity from work and initial velocity, or determine mass from work and velocity change. Perfect for physics students studying energy transfer and dynamics.

Calculate gravitational force using Newton's Law of Universal Gravitation: F = G·m₁·m₂/r². Compute gravitational force between two masses, find mass 1 or mass 2 from force and distance, or calculate distance between masses. Perfect for physics and astronomy students studying celestial mechanics and gravitation.

Calculate gravitational acceleration using g = GM/r². Compute gravitational acceleration from mass and radius, find mass from acceleration and radius, or calculate radius from mass and acceleration. Perfect for physics and astronomy students studying planetary gravity and celestial body surface gravity.

Calculate escape velocity using vₑₛc = √(2GM/R). Compute escape velocity from mass and radius, find mass from escape velocity and radius, or calculate radius from mass and escape velocity. Perfect for physics and astronomy students studying gravitational escape, space travel, and celestial body properties.

Calculate orbital period using Kepler's Third Law: T = 2π√(r³/GM). Compute orbital period from central mass and orbital radius, find orbital radius from mass and period, or calculate central mass from radius and period. Perfect for physics and astronomy students studying satellite orbits, planetary motion, and celestial mechanics.

Calculate your weight on different planets, moons, and dwarf planets using W = m × g. Compare how much you would weigh on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Earth's Moon, Titan, Europa, Pluto, and more. Perfect for physics students and space enthusiasts exploring how gravity affects weight across the solar system.

Calculate surface gravity using g = GM/R². Compute gravitational acceleration at a celestial body's surface from mass and radius, find mass from surface gravity and radius, or calculate radius from mass and surface gravity. Perfect for physics and astronomy students studying planetary properties and gravity.

Calculate gravitational potential energy using U = -GMm/r. Compute gravitational binding energy between two masses, find mass M from potential energy and mass m, calculate mass m from potential energy and mass M, or determine distance between masses. Perfect for physics and astronomy students studying orbital mechanics, satellite motion, and gravitational binding.

Calculate gravitational force using Newton's Law of Universal Gravitation: F = G·m₁·m₂/r². Compute gravitational force between two masses, find mass 1 or mass 2 from force and distance, or calculate distance between masses. Perfect for physics and astronomy students studying gravitational attraction, planetary motion, and celestial mechanics.

Calculate heat energy using Q = mcΔT. Compute heat energy from mass, specific heat, and temperature change; find mass from heat energy; determine temperature change; or calculate specific heat capacity. Perfect for physics and chemistry students studying thermodynamics and heat transfer.

Calculate specific heat capacity using c = Q/(mΔT). Compute specific heat from heat energy, mass, and temperature change; find heat energy (Q = mcΔT), mass (m = Q/(cΔT)), or temperature change (ΔT = Q/(mc)). Features an extensive material database with 40+ substances across categories: Liquids, Metals, Building Materials, Organics, Gases, and Food.

Calculate latent heat energy using Q = mL. Compute heat energy required for phase changes (melting, freezing, boiling, condensation, sublimation), find mass that can undergo phase change, or determine latent heat of fusion/vaporization. Perfect for physics and chemistry students studying thermodynamics and phase transitions.

Calculate linear thermal expansion using ΔL = αL₀ΔT. Compute expansion from original length, coefficient, and temperature change; find original length from expansion; calculate coefficient of thermal expansion; or determine temperature change. Perfect for physics and engineering students studying thermal effects on materials.

Calculate pressure, volume, moles, or temperature using the Ideal Gas Law: PV = nRT. Compute any variable in the gas equation with full unit support for pressure, volume, temperature, and amount of substance. Perfect for chemistry and physics students studying gas behavior and thermodynamics.

Calculate pressure or volume changes using Boyle's Law: P₁V₁ = P₂V₂ (at constant temperature). Compute final pressure from initial conditions and volume change, final volume from initial conditions and pressure change, or find initial pressure/volume from final conditions. Perfect for physics and chemistry students studying gas behavior and isothermal processes.

Calculate volume or temperature changes using Charles's Law: V₁/T₁ = V₂/T₂ (at constant pressure). Compute final volume from initial conditions and final temperature, final temperature from initial conditions and final volume, or find initial volume/temperature from final conditions. Perfect for physics and chemistry students studying gas behavior and isobaric processes.

Calculate pressure, force, or area using P = F/A. Compute pressure from force and area, find force from pressure and area, or calculate area from force and pressure. Perfect for physics and engineering students studying fluid mechanics, hydraulics, and mechanical systems.

Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K). Includes common temperature references (freezing point, boiling point, room temperature, body temperature, absolute zero) and contextual information about converted temperatures.

Calculate heat transfer rate using Fourier's Law: Q/t = k·A·ΔT/d. Compute heat transfer rate, thermal conductivity, area, thickness, or temperature difference for conduction heat transfer. Perfect for physics and engineering students studying thermal conduction and heat transfer applications.

Calculate Carnot efficiency using η = 1 - T₂/T₁. Compute maximum theoretical efficiency of a heat engine, find cold reservoir temperature from hot temperature and efficiency, or calculate hot reservoir temperature from cold temperature and efficiency. Perfect for physics and engineering students studying thermodynamics and heat engines.

Calculate Carnot efficiency using η = 1 - T₂/T₁. Compute maximum theoretical efficiency of a heat engine, find hot/cold reservoir temperatures, calculate work output from heat input, or determine heat input from work output. Perfect for physics and engineering students studying thermodynamics and heat engines.

Calculate frequency, period, wavelength, or wave velocity using f = 1/T, λ = v/f, and v = fλ. Compute frequency from period, period from frequency, wavelength from velocity and frequency, or wave velocity from frequency and wavelength. Perfect for physics students studying waves, sound, light, and electromagnetic radiation.

Calculate wavelength, frequency, or wave velocity using λ = v/f. Compute wavelength from velocity and frequency, frequency from velocity and wavelength, or wave velocity from frequency and wavelength. Perfect for physics students studying waves, light, sound, and electromagnetic radiation.

Calculate wave speed, frequency, or wavelength using v = fλ. Compute wave speed from frequency and wavelength, find frequency from wave speed and wavelength, or calculate wavelength from wave speed and frequency. Perfect for physics students studying mechanical waves, sound, light, and electromagnetic radiation.

Calculate period from frequency or frequency from period using T = 1/f. Compute period (time per cycle) from frequency in Hz, or calculate frequency (cycles per second) from period. Perfect for physics students studying oscillations, waves, sound, electronics, and periodic motion.

Calculate frequency shift due to relative motion between source and observer using f' = f(v ± vₒ)/(v ∓ vₛ). Compute observed frequency, source frequency, source velocity, or observer velocity for both sound waves and light/EM waves. Perfect for physics students studying wave phenomena, astronomy, radar, and medical ultrasound.

Calculate sound intensity, decibel level, sound power, or distance using β = 10 log(I/I₀) dB. Compute sound intensity from decibel level, sound level from intensity, sound power from intensity and distance, or distance from power and intensity. Perfect for physics and acoustics students studying sound waves and hearing safety.

Calculate speed of sound in air using v = 331.3 + 0.606T. Compute speed of sound from temperature, find temperature from measured speed, or calculate speed at altitude using standard atmospheric lapse rate. Perfect for physics and acoustics students studying sound wave propagation.

Calculate Mach number, velocity, or temperature using M = v / v_sound. Compute Mach number from velocity and temperature, find velocity from Mach number and temperature, or determine temperature from Mach number and velocity. Perfect for aerospace engineering, aviation, and physics students studying supersonic flight and compressible flow.