Physics Tools

Choose a feature below. Every tool runs on your device — no uploads required.

Solve core physics and electrical formulas including Ohm's law, power equation, equivalent resistance, and Kirchhoff current law.

Calculate voltage, current, or resistance using Ohm's Law (V=IR). Enter any two values to find the third. Free, browser-based physics calculator.

Calculate electrical power using P=IV and derived forms P=I²R, P=V²/R. Enter known values and compute watts instantly.

Calculate total resistance for series and parallel resistor networks. Enter resistor values and see equivalent resistance computed instantly.

Verify Kirchhoff's Current Law at circuit nodes. Enter branch currents and check that the sum entering equals the sum leaving.

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