Physics

Use our Work Calculator to find work done from force, distance, and angle or from mass, gravity, and height. Get results in J, kJ, Wh, kWh, and ft·lbf.

Use our Work and Power Calculator to find work from force and distance or lift, then calculate power in watts, kW, and horsepower from time.

Use our Projectile Motion Calculator to find time of flight, range, maximum height, time to peak, and velocity components from speed, angle, height, and gravity.

Use our Free Fall Calculator to find time, distance, final velocity, and average speed from height or time with gravity presets and unit conversion.

Use our Gravitational Force Calculator to find the force between two masses with Newton’s law of gravitation. Get results in newtons, lbf, and acceleration on each mass.

Use our Ohm’s Law Current Calculator to find current from voltage and resistance. Get instant results in A, mA, or µA plus power and conductance.

Use our Ohm’s Law Resistance Calculator to find resistance from voltage and current. Get instant results in Ω, kΩ, or MΩ plus power and conductance.

Use our Wavelength to Frequency Calculator to find frequency from wavelength with vacuum, air, water, or custom wave speed. Fast SI-based results online.

Use our Wavelength to Energy Calculator to find photon energy from wavelength in joules, eV, and kJ/mol using E = hc / λ with vacuum or custom wave speed.

Use our Velocity Calculator to find average velocity from distance or displacement and time. Get instant results in m/s, km/h, mph, and ft/s.