⚡ Science

🌞Blackbody Radiation Calculator Find the peak wavelength (Wien's law) and radiated power (Stefan–Boltzmann law) of a hot object from its temperature, free online. 🔄Centripetal Force Calculator Calculate centripetal force and acceleration for circular motion, free online. ⚡Coulomb's Law Calculator Calculate the electrostatic force and potential energy between two point charges, free online. 🧪Density Calculator Calculate density, mass or volume from any two known values, free online. 🚑Doppler Effect Calculator Calculate the frequency a moving observer hears from a moving sound source, free online. 🔌Electric Field of a Point Charge Calculator Calculate the electric field strength and electric potential at a distance from a point charge, free online. 🚀Escape Velocity Calculator Calculate the escape velocity of a planet or star from its mass and radius, free online. 🪂Free-Fall Drop Time Calculator Find how long an object takes to fall from a height — or how far it falls in a given time — and its impact speed, free online. 🌍Gravitational Force Calculator Calculate the gravitational attraction between two masses, free online. 🚀Kinematics Calculator — Motion Equations Solve for velocity, acceleration, time or displacement using kinematics equations. ⚡Kinetic & Potential Energy Calculator Calculate kinetic energy, gravitational potential energy and total mechanical energy, free online. 🎱Momentum & Impulse Calculator Calculate momentum from mass and velocity, and impulse from force and time, free online. ⚡Ohm's Law Calculator — Voltage, Current, Resistance Calculate voltage, current, resistance or power using Ohm's Law, free online. 🛰️Orbital Period (Kepler) Calculator Find the orbital period and speed of a satellite or planet from its orbit radius around the Sun, Earth, Moon, Mars or Jupiter, free online. ⏱️Pendulum Period Calculator Calculate the period and frequency of a simple pendulum, including a large-amplitude correction, free online. ⚗️pH Calculator — Acid & Base Calculate pH, pOH and the nature of a solution from concentration, free online. 💠Photon Energy Calculator Convert between photon wavelength, frequency and energy in joules and electronvolts, free online. 🪐Planet Gravity & Escape Velocity Calculator Compare surface gravity, escape velocity and your weight on the Moon, Mars, Jupiter and other planets, free online. 🔩Pressure Calculator — Force & Area Calculate pressure, force or area from any two known values, free online. 🏹Projectile Motion Calculator Calculate range, maximum height and flight time of a projectile, free online. 🔋RC Time Constant Calculator Calculate the time constant of a resistor-capacitor circuit, free online. 🔌Resistor Calculator — Series & Parallel Calculate total resistance for resistors in series or parallel, free online. 🔊Speed of Sound Calculator Calculate the speed of sound in air at any temperature, free online. 🪞Spherical Mirror Equation Calculator Find the image distance, magnification and image type for a concave or convex mirror, free online. 🔁Spring-Mass Oscillation Calculator Find the period, frequency, maximum speed and energy of a mass on a spring (simple harmonic motion), free online. 🪁Terminal Velocity Calculator Calculate the terminal velocity of a falling object from its mass, frontal area and drag coefficient, free online. 🚀Time Dilation & Length Contraction Calculator Calculate special-relativity time dilation, the Lorentz factor and length contraction at a fraction of the speed of light, free online. 🔧Torque on a Lever Calculator Calculate the torque of a force on a lever arm and the force needed to lift a load, free online. 〰️Wave Calculator — Frequency & Wavelength Calculate wave frequency, wavelength or speed, free online. ⚙️Work & Energy Calculator Calculate work done in Joules from force, distance and angle, free online.