Physics and engineering calculators. — 31 free tools.
Calculate voltage, current, resistance and power using Ohm's law (V = IR).
★Calculate force from mass and acceleration using F = m × a.
★Calculate density from mass and volume.
★Solve for speed, distance or time when you know the other two.
★Calculate kinetic energy from mass and velocity.
★Calculate electrical power from voltage and current.
★Calculate output voltage of a resistor divider.
★Add resistors connected in series.
★Combine resistors connected in parallel.
★Calculate energy stored in a capacitor.
★Convert frequency to wavelength for EM waves.
★Calculate force from mass and acceleration.
★Calculate momentum from mass and velocity.
★Calculate work done by a force over a distance.
★Calculate power from work done over time.
★Calculate gravitational potential energy.
★Calculate density from mass and volume.
★Calculate pressure from force and area.
★Solve for pressure using the ideal gas law.
★Calculate molarity of a solution.
★Calculate pH from hydrogen ion concentration.
★Calculate remaining quantity after radioactive decay.
★Estimate the speed of sound in air at a temperature.
★Calculate the range of a projectile.
★Calculate fall time and impact speed from a height.
★Calculate the electrostatic force between two charges.
★Estimate the heat index (feels-like temperature).
★Estimate the dew point from temperature and humidity.
★Calculate BMI Prime (ratio to upper normal BMI).
★Calculate Mach number from speed and sound speed.
★Estimate CO2 emissions from driving distance.
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Reviewed by: CalculatorFC Accuracy Review Desk
Last updated: June 23, 2026
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