Physics Calculators

Physics calculators on CalcMountain cover the foundational equations of classical mechanics, electromagnetism, optics, waves, and fluid dynamics. The collection is built around the equations taught in introductory and intermediate college physics, plus the practical electrical engineering tools (Ohm's law, voltage divider, voltage drop, wire gauge, resistor color code, capacitance, LED current limiter) that practicing electronics hobbyists and engineers use regularly.

Mechanics coverage includes Newton's second law (force), kinematics (speed/distance/time, acceleration, free fall), energy (kinetic, potential, work, power), momentum, friction, springs (Hooke's law, spring constant, pendulum period), and rotational quantities (torque, gear ratio, pulley). The escape velocity, orbital velocity, centripetal force, and E=mc² calculators support astrophysics and special-relativity coursework.

For waves and acoustics, we have wavelength, frequency, speed of sound, Doppler effect, and decibel calculators. The decibel calculator is particularly useful for audio engineering and OSHA noise-exposure calculations. Optics overlaps with the dedicated optics category but we keep a basic Snell's law calculator here for general physics use.

Electromagnetics covers Coulomb's law, capacitance, and the full set of practical electrical tools above. The voltage drop calculator follows NEC (National Electrical Code) guidelines for wire sizing in long runs — important for residential electricians and DIY installers running 240V circuits to outbuildings.

Fluid dynamics includes Bernoulli's equation, flow rate, pressure, density, and buoyancy. The Bernoulli calculator handles the canonical aerodynamics application but works for any incompressible flow.

Constants follow CODATA 2018 (the most recent international recommended values for physical constants). Equations follow the conventions in Halliday/Resnick/Walker, Young/Freedman, or Tipler/Mosca for general physics, and Horowitz/Hill for electronics. Real-world applications often involve corrections (relativistic effects, quantum corrections, non-ideal gas behavior, viscosity, turbulence) that our basic calculators don't address — for those, you'll want a specialized package or your professor.