Acceleration Calculator - Calculate acceleration from velocity change and time, force and mass, centripetal motion, or free fall. Get step-by-step solutions, g-force comparisons, and velocity-time graphs. New

Angular Velocity Calculator - Convert any angular velocity between RPM, rad/s, deg/s, Hz, revolutions per second, and rotation period in one form. Compute angular velocity from linear speed and radius (ω = v / r), or compute the tangential speed and centripetal acceleration at any radius. Includes a live spinning-disk animation, a full conversion table, and a comparison panel showing how your value stacks up against real-world rotations (Earth, vinyl record, hard drive, jet engine, dental drill). New

Boiling Point Calculator - Calculate the boiling point of water at different altitudes, elevations, or atmospheric pressures using the Clausius-Clapeyron equation. Includes step-by-step solutions and interactive altitude chart. New

Centripetal Force Calculator - Compute the centripetal force, mass, radius, or speed for any object moving on a circular path. Solve F = mv²/r in any direction, switch between linear speed (m/s, km/h, mph) and angular inputs (rad/s, RPM, period, frequency), see the live rotation animation, the g-force in multiples of gravity, the period and angular velocity, and (for vehicle turns) the minimum tire-friction coefficient needed to stay on the road. New

Coulomb's Law Calculator - Compute the electrostatic force between two point charges with Coulomb's law, F = k·q₁·q₂/(εᵣ·r²). Switch any of F, q₁, q₂, or r to the unknown, choose charge units (C, mC, µC, nC, pC, e), pick a dielectric medium (vacuum, air, water, glass, …), and read the force magnitude, attract/repel direction, electric field, potential energy, and the dramatic F_electric ⁄ F_gravity ratio — plus a live SVG that animates the field lines and force arrows. New

Density Calculator - Calculate density from mass and volume, or solve for mass or volume given density. Supports multiple unit systems with step-by-step solutions and material comparisons. New

Doppler Effect Calculator - Calculate the observed frequency, wavelength change, and pitch shift when a sound or light source moves relative to an observer. Supports classical sound Doppler, relativistic light Doppler, multiple wave media (air, water, helium, steel), live animation, and an audio preview of the pitch change. New

Electric Field Calculator - Compute the electric field strength E (in V/m or N/C) produced by one or many point charges using E = k·q/r², with full vector superposition for multi-charge problems. Place up to six charges anywhere in the 2D plane, pick a test point, and read the field components Eₓ, Eᵧ, the magnitude |E|, the direction angle θ, the force on a probe charge, the electric potential V, and a step-by-step derivation — all with a live SVG that draws each contribution arrow and the resulting net field vector. New

Electricity Calculator - Calculate voltage, current, resistance, and power using Ohm's Law and Watt's Law. Enter any two known values and instantly solve for the other two with detailed step-by-step formulas.

Force Calculator - Calculate force, mass, or acceleration using Newton's second law F=ma. Enter any two values to solve for the third, with unit conversions and real-world force comparisons. New

Free Fall Calculator - Calculate the velocity, distance, and time for objects in free fall under gravity. Supports multiple planets and provides step-by-step solutions with trajectory data. New

Horsepower Calculator - Calculate engine horsepower from torque and RPM, or solve for any unknown. Supports Imperial (lb-ft, HP) and Metric (Nm, kW) units with step-by-step solutions and unit conversions. New

Ideal Gas Law Calculator - Calculate pressure, volume, moles, or temperature using the ideal gas law equation PV=nRT. Supports multiple unit systems with step-by-step solutions and automatic unit conversions. New

Kinematics Calculator - Solve one-dimensional kinematics problems using the four kinematic equations. Enter any 3 known variables to find the 2 unknowns with detailed step-by-step solutions.

Kinetic Energy Calculator - Calculate kinetic energy using KE = ½mv². Enter any two values to solve for the third. Supports multiple units with step-by-step solutions and real-world energy comparisons. New

Lens Equation Calculator - Solve the thin-lens equation 1/f = 1/u + 1/v to find focal length, object distance, image distance, magnification, and image height. Identify whether the image is real or virtual, upright or inverted, magnified or reduced. Live ray-diagram preview, converging and diverging lenses, and unit support for mm, cm, and m. New

Magnetic Field of Wire Calculator - Compute the magnetic field B around a current-carrying conductor using the Biot–Savart law and Ampère's law. Three geometries in one tool: an infinite straight wire, a circular current loop (on-axis), and a finite or ideal solenoid with optional ferromagnetic core. Solve for B, current I, distance r, loop radius R, axial position z, turns N, or solenoid length L, with a live SVG that draws the encircling field lines, the right-hand-rule direction, and the inside-vs-outside field strength side-by-side with real-world references (Earth, fridge magnet, MRI, neutron star). New

Moment of Inertia Calculator - Compute the moment of inertia for 15 common shapes — both the area moment of inertia used in beam bending (rectangle, circle, hollow tube, I-beam, triangle, semicircle, hollow box) and the mass moment of inertia used in rotational dynamics (thin rod, solid and hollow cylinder, solid and hollow sphere, rectangular plate). Switch units freely (mm⁴, cm⁴, m⁴, in⁴, ft⁴ for area; g·cm², kg·m², lb·ft², lb·in² for mass), add a parallel-axis offset, and read the centroid, cross-section area, polar moment, section modulus, radius of gyration, and a step-by-step LaTeX derivation alongside a live SVG diagram of the chosen cross-section. New

Momentum Calculator - Calculate linear momentum (p=mv), analyze elastic and inelastic collisions with conservation of momentum, and compute impulse. Step-by-step solutions with collision animation. New

Pendulum Period Calculator - Calculate the period T of a simple pendulum from its length and gravity using T = 2pi * sqrt(L/g). Solve for period, length, frequency, or gravity; pick a planet's gravity in one click; compare the small-angle approximation with the exact elliptic-integral formula; and watch a live SVG pendulum swing at the computed period. New

Potential Energy Calculator - Calculate gravitational potential energy (PE = mgh) or elastic potential energy (PE = ½kx²). Supports multiple planets, unit conversions, and detailed step-by-step solutions. New

Pressure Calculator - Calculate pressure from force and area using P=F/A. Supports multiple unit systems (Pa, kPa, bar, atm, psi, mmHg) with step-by-step solutions, unit conversions, and real-world pressure comparisons. New

Projectile Motion Calculator - Calculate projectile range, maximum height, time of flight, and full trajectory from launch angle and initial velocity. Supports custom gravity, initial height, and animated trajectory visualization. New

Snell's Law Calculator - Apply Snell's Law to compute the angle of refraction, the refractive index, the critical angle for total internal reflection, and Brewster's polarization angle. Pick from a built-in material library (water, glass, diamond, fiber optic and more), or enter custom indices, then watch the incident, refracted, and reflected rays animate on an interactive light-ray diagram. New

Spring Constant Calculator - Calculate the spring constant k, the restoring force F, the displacement x, or the stored elastic energy U using Hooke's law F = k·x. Supports SI, metric, and imperial units, springs in series or parallel, a live coil animation, oscillation period and natural frequency for a given mass, and a real-world stiffness comparison table. New

Torque Calculator - Calculate torque from force and lever arm distance using τ = F × r × sin(θ). Solve for any unknown variable with detailed step-by-step solutions, unit conversions, and real-world torque comparisons. New

Velocity Calculator - Calculate velocity from distance and time. Supports average velocity, relative velocity, angular to linear conversion, and instant unit conversions between m/s, km/h, mph, ft/s, and knots. New

Work and Power Calculator - Calculate work done by a force (W = Fd cosθ) and mechanical power (P = W/t). Supports multiple units, angle input, and provides step-by-step solutions with energy comparisons. New