Physics Calculators
Professional tools for Physics Calculators
Our Physics Calculators collection covers mechanics, energy, electricity, waves, thermodynamics, and modern physics. Whether you need to calculate velocity, solve circuit problems, or understand projectile motion, our 110 free physics calculators give you instant answers with complete step-by-step solutions for every physics concept!
Ideal Gas Law Calculator — PV=nRT, Combined Gas Law & Van der Waals
Free ideal gas law calculator — solve PV=nRT for any variable, use the combined gas law (Boyle's, Charles's, Gay-Lussac's), find molar mass of unknown gases, and compare ideal vs real gas with Van der Waals equation. Full step-by-step working.
Use Calculator →Pressure Calculator — P=F/A, Hydrostatic, Absolute vs Gauge & Altitude
Free pressure calculator — compute P=F/A (force per area), hydrostatic pressure P=ρgh at any fluid depth, convert between absolute and gauge pressure, find pressure altitude with ISA formula, and convert all pressure units (Pa, psi, bar, atm, mmHg)
Use Calculator →Free Fall Calculator — Distance, Time, Velocity & Terminal Velocity
Free fall calculator — compute fall time, distance, and velocity using v=gt, d=½gt², and v²=2gd. Includes terminal velocity calculator, reference table for falls from 10ft to 30,000ft, and comparison with/without air resistance
Use Calculator →Gravitational Force Calculator — Newton’s Law, Planet Weight & G-Force
Free gravitational force calculator — compute F=Gm₁m₂/r² between any two masses, find your weight on all planets (Mars, Moon, Jupiter), calculate surface gravity, g-force, and impact force. Full step-by-step working
Use Calculator →Electric Field Calculator — Coulomb’s Law, E Field & Point Charge with Steps
Free electric field calculator — compute electric force (Coulomb's law F=kq₁q₂/r²), electric field from point charge (E=kq/r²), field from voltage (E=V/d), and fields from wire, ring, and disk charge distributions. Full step-by-step working
Use Calculator →Work Calculus Calculator — Work as an Integral W=∫F(x)dx with Steps
Free work calculus calculator — compute work done by variable forces using W=∫F(x)dx. Covers spring work (Hooke's law), chain lifting, liquid pumping, and general variable force problems with full symbolic integration steps. Calculus 2 work problems solved
Use Calculator →Work Done Calculator — W=Fd·cosθ Physics Formula with Steps
"Free work done calculator — compute work using W=F×d×cosθ, solve for force, distance, or angle, apply the Work-Energy Theorem, and calculate power. Full step-by-step working with force-displacement diagram
Use Calculator →Capacitor Charge Calculator — Energy, Charge, Voltage & RC Circuit
Free capacitor charge calculator — find energy stored (E=½CV²), charge (Q=CV), and voltage from any two known values. Includes RC circuit discharge calculator, series/parallel capacitance, and plate capacitor geometry. Full step-by-step working
Use Calculator →Doppler Effect Calculator — Frequency, Shift & Doppler Equation with Steps
Free Doppler effect calculator — compute observed frequency using f'=f(v+v_o)/(v+v_s) for sound or the relativistic formula for light. Includes sign convention guide, ambulance example, redshift calculator, and animated wavefront simulation
Use Calculator →Refractive Index Calculator — Snell’s Law, Angle of Refraction & Critical Angle
Free refractive index calculator — solve Snell's law (n₁sinθ₁=n₂sinθ₂) for any variable, find the critical angle for total internal reflection, and calculate refractive index from speed or wavelength. Full step-by-step working with ray diagram.
Use Calculator →Buoyancy Calculator — Buoyant Force, Float or Sink & Water Displacement
Free buoyancy calculator — calculate buoyant force using F_b=ρgV (Archimedes' principle), determine if objects float or sink, find apparent weight in water, and compute water displacement. Includes scuba diving weight calculator
Use Calculator →Photon Energy Calculator — E=hf, Wavelength to Energy & eV Converter
Free photon energy calculator — convert between photon energy (Joules, eV), frequency (Hz to THz), wavelength (nm, μm, Å), and wavenumber (cm⁻¹). Uses E=hf and E=hc/λ with full step-by-step working and EM spectrum classification.
Use Calculator →Arc Length Calculator — Geometry, Calculus & Parametric Curves
Free arc length calculator — find arc length of circle arcs (s=rθ), functions (∫√(1+f'²)dx), parametric and polar curves. Also finds radius from arc length using the sagitta-chord formula. Full step-by-step working
Use Calculator →Standard Atmosphere Calculator — Density Altitude, Pressure & Temperature vs Altitude
Standard atmosphere calculator — find temperature, pressure, density, and speed of sound at any altitude using the ISA model. Includes density altitude calculator, pressure altitude converter, and full ISA reference table from sea level to 80km
Use Calculator →Air Properties Calculator — Molar Mass, Specific Heat, Viscosity & Thermal Conductivity
Air properties calculator — find density, dynamic viscosity, kinematic viscosity, specific heat (cp, cv), thermal conductivity, Prandtl number, and speed of sound at any temperature. Includes molar mass of air (28.9647 g/mol) and a complete reference table from −50°C to 1000°C
Use Calculator →Density Calculator — ρ = m/V, Cylinder, Water Displacement & Reference Table
Free density calculator — solve ρ=m/V for density, mass, or volume, find density of cylinders and spheres, use water displacement, and look up water density in kg/m³, lb/ft³, g/cm³, and lb/gal at any temperature
Use Calculator →Uniform Circular Motion Calculator — Period, Centripetal Force & Acceleration
Free uniform circular motion calculator — solve for period, frequency, angular velocity, centripetal acceleration, centripetal force, and normal force. Full UCM formula reference and AP Physics 1 worked examples
Use Calculator →Force Calculator – F = ma, Net Force, Applied Force & Newton’s Laws
Free force calculator solve F = ma for force, mass or acceleration, calculate net force from multiple forces, find applied force with friction, and compute average force using impulse-momentum theorem. Full step-by-step working
Use Calculator →Gravitational Potential Energy Calculator – GPE = mgh Formula & Examples
Free gravitational potential energy calculator - solve GPE = mgh for any variable, calculate ΔGPE between two heights, compute gravitational force with Newton's law. All planets included with step-by-step working
Use Calculator →Acceleration Calculator – Average Acceleration Formula & Equations
Free average acceleration calculator - solve a = (vf−vi)/t, find acceleration from distance and time, acceleration without time using vf²=vi²+2ad, and centripetal acceleration. Full step-by-step working
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