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Physics calculators and tools

Motion, force, energy, electricity, and practical physics calculators.

Light-Year and Parsec ConverterConvert between light-years and parsecs for astronomy distances, with kilometers and astronomical units shown for context.Speed Distance Time CalculatorCalculate average speed and pace from distance and travel time using metric or imperial units.Force CalculatorCalculate force from mass and acceleration using Newton's second law.Kinetic Energy CalculatorEstimate kinetic energy from mass and velocity.Ohm's Law CalculatorCalculate resistance and power from voltage and current.Density CalculatorCalculate density from mass and volume.Pressure CalculatorCalculate pressure from force and area.Projectile Motion CalculatorEstimate ideal projectile range, maximum height, and flight time from launch speed and angle.Momentum CalculatorCalculate momentum and kinetic energy from mass and velocity.Work and Energy CalculatorCalculate mechanical work and power from force, distance, angle, and time.Acceleration CalculatorCalculate acceleration from initial velocity, final velocity, and time.Torque CalculatorCalculate torque from force, lever arm, and angle.Wave Speed CalculatorCalculate wave speed and period from frequency and wavelength.

Check dimensions before trusting a physics result

Physics calculators connect measured quantities through formulas for motion, force, energy, waves, electricity, and related topics. Select the formula that matches the known values, convert inputs to a consistent unit system, and keep signs or directions when the quantity is a vector. A quick dimensional check can catch many setup errors before arithmetic begins.

Most simple calculators assume an idealized model such as constant acceleration, negligible resistance, or uniform conditions. Compare those assumptions with the real situation. For engineering, laboratory, or safety work, include uncertainty and use the standards, tolerances, and professional review required by the application.