Science & Physics Calculators

Work out how much stock solution and diluent you need to reach a target concentration and volume.

Project how much of a substance remains after a given time, and how many half-lives have passed.

Find pressure from moles, temperature, and volume, with density and molar volume included.

Convert solute mass, molar mass, and solution volume into molarity and millimolarity.

Parse a chemical formula into molar mass, atom count, and percentage composition by mass.

Enter any two of voltage, current, resistance, or power and solve the other two.

Convert between pH, pOH, hydrogen-ion, and hydroxide-ion concentration with an acidity label.

Calculate flight time, range, maximum height, and launch components from speed, angle, and height.

Decode a four-band resistor from its colours into resistance and tolerance range.

Calculate the energy needed to heat or cool a mass by a temperature change using specific heat.

Calculate the volts lost in a two-wire run and the voltage that actually reaches the load.

Find the minimum conductor cross-section that keeps voltage drop within a percentage you set.