Free STEM Calculators & Tools

Essential calculators for math, chemistry, physics, and statistics. Built for students, by students.

Ohm's Law Calculator
Physics
Calculate voltage, current, resistance, or power using Ohm's Law. Essential for electronics and physics problems.
Projectile Motion Calculator
Physics
Calculate projectile motion parameters: range, max height, time of flight, and velocity components.
Vector Addition Calculator
Physics
Add vectors in 2D and 3D. Calculate resultant magnitude, direction, and unit vectors. Supports component and polar forms.
Inclined Plane Calculator
Physics
Calculate forces on inclined planes. Find normal force, parallel force, friction, and acceleration.
Friction Calculator
Physics
Calculate static and kinetic friction forces. Find friction coefficients and determine if objects will slide.
Kinematics Calculator
Physics
Solve kinematics problems with constant acceleration. Calculate displacement, velocity, acceleration, and time.
Center of Mass Calculator
Physics
Calculate center of mass for systems of particles. Find the balance point of multiple objects.
Torque Calculator
Physics
Calculate torque, lever arm, and rotational forces. Solve lever and rotational equilibrium problems.
Pendulum Calculator
Physics
Calculate pendulum period, frequency, and length. Supports simple and physical pendulums.
Power & Efficiency Calculator
Physics
Calculate mechanical power, work, and efficiency. Convert between watts, horsepower, and other units.
Terminal Velocity Calculator
Physics
Calculate terminal velocity for falling objects. Account for air resistance and drag coefficients.
Relative Velocity Calculator
Physics
Calculate relative velocity between moving objects. Solve reference frame problems in 2D and 3D.
Coulomb's Law Calculator
Physics
Calculate electric force between charges using Coulomb's Law. Find force, charge, or distance.
Resistor Calculator
Physics
Calculate equivalent resistance for series and parallel circuits. Supports multiple resistors and mixed configurations.
Capacitor Calculator
Physics
Calculate capacitor charge, discharge, and RC time constants. Analyze capacitor circuits and energy storage.
Doppler Effect Calculator
Physics
Calculate observed frequency changes due to motion. Supports sound and light Doppler shifts.
Snell's Law Calculator
Physics
Calculate refraction angles using Snell's Law. Find critical angles and total internal reflection.
Lens Equation Calculator
Physics
Calculate image distance, magnification, and focal length using the thin lens equation.
Ideal Gas Law Calculator
Physics
Calculate pressure, volume, temperature, or moles using PV=nRT. Supports multiple unit systems.
Thermal Expansion Calculator
Physics
Calculate linear, area, and volumetric thermal expansion. Find dimension changes with temperature.
Heat Transfer Calculator
Physics
Calculate heat transfer through conduction, convection, and radiation. Find thermal conductivity and heat flow.
Spring-Mass Oscillator Calculator
Physics
Calculate simple harmonic motion. Find period, frequency, amplitude, and energy of spring-mass systems.
Wave Interference Simulator
Physics
Visualize constructive and destructive interference. Calculate path difference and intensity patterns.
Half-Life Calculator
Physics
Calculate radioactive decay and half-life. Find remaining amount, decay constant, and time elapsed.
Moment of Inertia Calculator
Physics
Calculate moment of inertia for common shapes. Find rotational inertia for disks, spheres, rods, and more.
Electric Field Calculator
Physics
Calculate electric field strength and potential. Visualize field lines for point charges and distributions.
Magnetic Field Calculator
Physics
Calculate magnetic field strength for wires, solenoids, and loops. Apply Biot-Savart and Ampere's law.
Work-Energy Theorem Calculator
Physics
Calculate work, kinetic energy, and potential energy. Apply the work-energy theorem to mechanics problems.
Angular Momentum Calculator
Physics
Calculate angular momentum for rotating objects. Apply conservation of angular momentum.
Buoyancy Calculator
Physics
Calculate buoyant force and determine if objects float or sink. Apply Archimedes principle.
Wave Speed Calculator
Physics
Calculate wave speed, frequency, and wavelength. Analyze standing waves and harmonics.
Rotational Kinetic Energy Calculator
Physics
Calculate rotational kinetic energy. Compare translational and rotational energy for rolling objects.

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