Physics Calculators
Solve physics problems instantly with free online calculators. Velocity, force, acceleration, energy, momentum, resistance, half-life, projectile motion, and interactive formula sheets. All calculations run privately in your browser — no sign-up needed.
Velocity Calculator
Calculate average, final, and initial velocity using displacement, time, and acceleration. Step-by-step solutions for kinematics problems.
Force Calculator
Calculate force using F=ma, gravitational force, net force, and centripetal force. Step-by-step Newton's law solutions.
Resistance Calculator
Calculate electrical resistance using Ohm's law, series and parallel circuits, and resistor color band decoder.
Half-Life Calculator
Calculate radioactive decay and drug half-life. Find remaining quantity, elapsed time, or decay constant with step-by-step working.
Physics Formula Sheet
Interactive searchable physics formula reference. Mechanics, waves, electricity, optics, and thermodynamics. Click to copy any formula.
Acceleration Calculator
Calculate acceleration from velocity change and time. Includes gravitational, centripetal, and angular acceleration modes.
Kinetic Energy Calculator
Calculate kinetic energy, mass, or velocity using KE=½mv². Includes relativistic mode and unit conversions.
Potential Energy Calculator
Calculate gravitational and elastic potential energy. Find height, mass, or spring constant with step-by-step working.
Projectile Motion Calculator
Calculate range, max height, and flight time for projectile motion. Visual trajectory graph with step-by-step solutions.
Momentum Calculator
Calculate linear momentum and solve elastic and inelastic collision problems. Conservation of momentum with step-by-step working.