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

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

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

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

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

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