Science & Physics Tools
Ohm’s law, density, molarity, half-life, free fall — the classic formulas from physics and chemistry class, each with a calculator that shows the worked answer. Homework-friendly and privacy-friendly: every calculation runs entirely in your browser.
10 tools, ready when you are
- Ohm's Law Calculator Enter any two of voltage, current, resistance and power — the other two are solved instantly. Science & Physics
- Density Calculator Mass and volume in, density out — g/cm³, kg/m³ and lb/ft³ at once, with a floats-or-sinks check. Science & Physics
- Molarity Calculator Moles or mass with molar mass, plus solution volume — molarity in M, mM and µM at once. Science & Physics
- Half-Life Calculator What remains after any elapsed time: percent left, amount decayed, decay constant and more. Science & Physics
- Free Fall Calculator Drop height, fall time and impact velocity — enter one, get the others (g = 9.81, no drag). Science & Physics
- Dilution Calculator Solve C1V1 = C2V2 for any missing value when diluting a stock solution to a working strength. Science & Physics
- Projectile Motion Calculator Launch speed and angle give range, max height and flight time — the classic no-drag projectile equations. Science & Physics
- Ideal Gas Law Calculator Solve PV = nRT for any missing variable, with pressure, volume, moles and temperature unit options. Science & Physics
- Molar Mass Calculator Type a chemical formula — H2O, CuSO4·5H2O, Ca(OH)2 — and get its molar mass with a full element breakdown. Science & Physics
- Wavelength & Frequency Calculator Convert wavelength, frequency and wave speed for light (c) and sound (343 m/s), plus photon energy E = hf. Science & Physics
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