Science & Engineering
Ohm's Law Calculator
Solve Ohm's law for voltage, current, or resistance. Enter any two of the three quantities and pick which one to solve for — the calculator also reports power.
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Physics, chemistry, and electronics calculators — Ohm's law, ideal gas law, pH, resistor codes, and more.
Solve Ohm's law for voltage, current, or resistance. Enter any two of the three quantities and pick which one to solve for — the calculator also reports power.
Solve PV = nRT for pressure, volume, moles, or temperature. Enter the other three quantities and the calculator handles the gas constant for you.
Solve the classical kinetic energy equation for energy, mass, or velocity. Enter the other two values and pick which one to solve for.
Solve density = mass ÷ volume for density, mass, or volume. Enter the other two known values and pick which one to solve for.
Solve Ohm's law for voltage, current, or resistance. Enter any two of the three quantities and pick which one to solve for — the calculator also reports power.
Solve PV = nRT for pressure, volume, moles, or temperature. Enter the other three quantities and the calculator handles the gas constant for you.
Solve the classical kinetic energy equation for energy, mass, or velocity. Enter the other two values and pick which one to solve for.
Solve density = mass ÷ volume for density, mass, or volume. Enter the other two known values and pick which one to solve for.
Solve torque = force × lever arm × sin(angle) for torque, force, or lever arm length. Enter the angle between the force and the arm.
Calculate the distance fallen and final velocity of an object in free fall under gravity, given an optional initial downward velocity and the time elapsed.
Calculate the range, maximum height, and time of flight of a projectile launched at an angle, optionally from an initial height above the ground.
Calculate the National Weather Service wind chill temperature — how cold it actually feels — from air temperature and wind speed.
Decode a 4-band resistor's color code into its resistance value and tolerance range, using the standard IEC 60062 color code table.
Solve molarity = moles ÷ liters of solution for molarity, moles of solute, or solution volume.
Solve the dilution equation C₁V₁ = C₂V₂ for any one of the four values — initial concentration, initial volume, final concentration, or final volume.
Calculate how much of a radioactive or decaying substance remains after a given time, based on its half-life.
Calculate pH from hydrogen-ion concentration, or hydrogen-ion concentration from pH — plus the corresponding pOH and hydroxide-ion concentration.