Science & Engineering
Physics, chemistry and electronics formulas, solved with units.
Science & Engineering
11 ToolsOhm's Law Calculator
Find voltage, current or resistance from the other two with Ohm's law, plus the power used.Density Calculator
Find density, mass or volume from the other two in any units, and see whether the object would float or sink in water.Speed, Distance and Time Calculator
Find speed, distance or travel time from the other two, in any units, with the time also shown in hours, minutes and seconds.Force Calculator (F = ma)
Use Newton's second law to find force, mass or acceleration from the other two, in any units, with the mass's weight on Earth for comparison.Kinetic and Potential Energy Calculator
Work out kinetic energy (½mv²) or gravitational potential energy (mgh) in any units, and see the height or speed the same energy is worth.Projectile Motion Calculator
Find a projectile's range, time of flight, maximum height and landing speed from its launch speed, angle and height, with no air resistance.Molarity and Dilution Calculator
Find molarity, moles or volume from the other two, or work out a dilution: how much stock solution and how much water you need.Molar Mass Calculator
Type a chemical formula to get its molar mass, each element's share by mass, and how many moles a given mass is. Handles groups and hydrates.Ideal Gas Law Calculator (PV = nRT)
Solve PV = nRT for pressure, volume, moles or temperature in any units, with the gas constant and temperature conversions handled for you.pH Calculator
Find pH, pOH, [H⁺] and [OH⁻] from any one of them, see whether a solution is acidic, neutral or basic, and where it sits on the pH scale.Wavelength and Frequency Calculator
Convert between wavelength and frequency for light, sound or any wave, find the wave speed, and get the period and a light wave's photon energy.
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