🧲 Physics Calculators

Speed, acceleration, force, energy, power, projectile motion, Ohm's law and more, with the formulas shown step by step.

Acceleration CalculatorCalculate acceleration from initial speed, final speed and time, or solve for final velocity, initial velocity or time. Shows m/s², g-force and distance covered.Density CalculatorCalculate density from mass and volume, or find mass or volume from density. Units include kg/m³, g/cm³ and lb/ft³, with liters, mL, cm³, m³, ft³ and gallons.Force CalculatorSolve Newton's second law for force, mass or acceleration in newtons, kilonewtons or pound-force, kilograms or pounds. Also shows the object's weight on Earth.Kinetic Energy CalculatorCalculate kinetic energy from mass and speed, or solve for mass or velocity. Results in joules, kilojoules, foot-pounds and kWh, with mass in kg or lb and speed in m/s, km/h or mph.Ohm's Law CalculatorEnter any two of voltage, current, resistance and power to get the other two. Uses V = IR and P = VI, with unit prefixes like mA, kΩ and mW.Potential Energy CalculatorCalculate gravitational potential energy from mass and height, or solve for mass or height. Joules, kJ and foot-pounds, kg or lb, meters or feet, on Earth, the Moon or Mars.Power CalculatorCalculate power from work and time or from force and speed, or solve for any value. Results in watts, kilowatts and horsepower (1 hp = 745.7 W).Pressure CalculatorCalculate pressure from force and area, or solve for force or area. Converts between pascals, kilopascals, psi, bar and atmospheres, with newtons, lbf, m², cm², mm², in² and ft².Projectile MotionEnter launch speed, angle and starting height to get time of flight, maximum height, horizontal range and impact speed. Handles launches from above the ground, ignoring air resistance.Speed, Distance & TimeFind speed, distance or travel time from the other two. Works in km/h, mph, m/s and knots, kilometers, miles and meters, with hours, minutes and seconds.