Science & Engineering

Science and engineering calculators apply standard formulas from physics, chemistry and electronics. For circuits, the Ohm's law calculator relates voltage, current and resistance, the resistor calculator combines two resistors in series or parallel, and the voltage drop calculator estimates the drop along a conductor.

For chemistry, the molarity calculator finds concentration from moles and volume, and the molecular weight calculator adds up atomic masses. The density and mass from density calculators relate mass, volume and density, and the half-life calculator models exponential decay. Weather tools include the dew point, heat index and wind chill calculators, and the horsepower calculators estimate power from torque and engine figures.

Each page names the equation and its assumptions, such as ideal conditions or a specific formula version. Use the results for study and quick checks, and rely on the relevant code, datasheet or lab procedure for safety-critical design work.