Science Calculators
Core physics and chemistry calculations — pH, force, energy, and molarity.
Number of Calculators: 22
What to Know
Core physics and chemistry, covering electricity (Ohm's Law, Electrical Power, Voltage Divider, Resistors in Series/Parallel, Capacitor, Inductor), thermodynamics (Ideal Gas Law, Heat Energy, Thermal Expansion, Dew Point), and mechanics (Force, Free Fall, Projectile Motion, Kinetic/Potential Energy) as genuinely separate clusters rather than one generic "science" grab bag.
Every formula here is a long-standing, textbook-stable equation, cited to its actual source rather than asserted without backing. Feels Like (combining Wind Chill and Heat Index) and Dew Point are the two calculators here most people actually reach for day to day, even though they sit alongside more classroom-oriented tools like Molarity and Half-Life.
- Ohm's LawSolve for voltage, current, or resistance from the other two using Ohm's Law, plus the resulting power.
- Electrical PowerSolve for a device's power, current, or voltage from the other two — most often read straight off its own rating label.
- Voltage DividerFind the output voltage from a two-resistor voltage divider, plus the voltage drop and current.
- Resistors in Series and ParallelFind the total combined resistance of any number of resistors wired in series or in parallel.
- CapacitorFind the energy stored and charge held by a capacitor from its capacitance and voltage.
- InductorFind the energy stored by an inductor from its inductance and the current flowing through it.
- Wavelength & FrequencySolve for wavelength or frequency from the other, given a wave’s propagation speed -- for light, sound, or any other wave.
- Ideal Gas LawSolve for pressure, volume, moles, or temperature from the other three using the ideal gas law, PV = nRT.
- Heat EnergyFind the heat energy needed to change a substance’s temperature using Q = mcΔT, with common material presets.
- Thermal ExpansionFind how much a material’s length changes with temperature using ΔL = L0αΔT, with common material presets.
- Density, Mass & VolumeSolve for density, mass, or volume from the other two, each shown in your choice of common mass and volume units.
- SpeedSolve for speed, distance, or time from the other two, in your choice of common distance and speed units.
- Dew PointEstimate dew point from air temperature and relative humidity using the Magnus formula.
- Feels Like TemperatureCalculate wind chill for cold, windy conditions or heat index for hot, humid conditions, using the official National Weather Service formulas.
- pHFind the pH, pOH, and hydrogen/hydroxide-ion concentration of a solution, and see whether it is acidic, neutral, or basic.
- Force Calculator (F = ma)Solve for force, mass, or acceleration using Newton's second law (F = ma), with the result also shown in pound-force.
- Kinetic & Potential EnergyCalculate kinetic energy from mass and velocity, or gravitational potential energy from mass and height, shown in joules, kilojoules, and kilowatt-hours.
- Free FallFind how long an object takes to fall, or how far it falls, and its impact velocity, ignoring air resistance.
- Molarity & DilutionSolve for molarity, moles, or volume, or work out a C1V1 = C2V2 dilution — how much stock solution and diluent you need for a target concentration.
- Half-Life / Radioactive DecayFind how much of a substance remains after a given time, or how much time has passed, using exponential half-life decay.
- Projectile MotionFind the range, time of flight, and max height of an object launched at an angle, ignoring air resistance.
- Molar MassFind the molar mass of any chemical formula — including parenthesized groups and hydrates — using current IUPAC standard atomic weights, with a full per-element mass breakdown.