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)
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
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
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
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
“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
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
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
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.
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