⚛️ Physics
Physics calculators cover mechanics, electricity, waves, optics and thermodynamics: force and motion, work and energy, power, Ohm's law and circuit values, wavelength and frequency, sound intensity, pressure, and thermal quantities. Formulas follow SI conventions and the values cite standard sources such as NIST and the SI brochure. Every page gives the formula with its variables named, a worked example with units carried through, and a note on the assumptions the formula makes, because most textbook equations describe idealised situations. The calculators run entirely in your browser and accept any consistent set of units. Check your unit conventions before relying on a result, and treat anything safety-critical as requiring independent verification. Each physics page lists the equation's limits, such as constant acceleration or idealised friction, so the tool is honest about when the answer holds.
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Wave Frequency Calculator
Solve the wave equation v = f × λ for frequency, wavelength, or wave speed.
Angular Momentum Calculator
Solve L = I·ω (rigid body) or L = m·v·r·sin θ (point mass / orbital). Includes shape presets and verified astrophysical examples.
Projectile Motion Calculator
Solve time of flight, max height, and horizontal range for a projectile launched at speed v₀ and angle θ, from any initial height h₀. Includes trajectory samples and gravity presets.
Capillary Action Calculator
Solve Jurin's law h = (2γ·cos θ) / (ρ·g·r) for the capillary rise (or depression) of a liquid in a tube.
Stefan-Boltzmann Calculator
Solve P = εσAT⁴ for the thermal radiation emitted by a surface, or back-solve for temperature given power.
Acoustic Impedance Calculator
Solve z = ρ·c, Z = ρ·c/A, or the reflection/transmission coefficients R and T at a normal-incidence boundary. Includes a verified material library (air, water, steel, bone, muscle, blood, etc.).
Gravitational Potential Energy Calculator
Solve PE = mgh near a planetary surface or U = -GMm/r in space; for any variable.
Momentum Calculator
Solve linear momentum p = m × v for momentum, mass, or velocity.
Power Calculator
Solve power, work, time, force, velocity, voltage, current, or power factor across mechanical and electrical modes.
Centripetal Force Calculator
Solve centripetal force, mass, velocity, or radius for uniform circular motion.
Free Fall Calculator
Solve free-fall time, final velocity, or fall distance under constant gravity.
Gravitational Force Calculator
Solve Newton’s law of universal gravitation for force, mass, or distance.
Impulse Calculator
Solve impulse, average force, or time interval from the impulse-momentum theorem.
Potential Energy Calculator
Solve gravitational potential energy, mass, height, or gravity from PE = mgh.
Coulomb's Law Calculator
Calculate electrostatic force between two charges using F = k·q₁q₂/r².
Work Calculator
Calculate mechanical work: constant force W = F·d·cos θ, variable force W = ∫F(x) dx, and spring W = ½k(x₁² − x₀²).
Wavelength & Frequency Calculator
Convert between wavelength, frequency, and photon energy using c = λ·f and E = h·f.
Dew Point Calculator
Compute dew point, frost point note (below 0 °C), and absolute humidity from air temperature and relative humidity. Celsius / Fahrenheit toggle.
Decibel (dB) Calculator
Convert power and amplitude ratios to decibels (10·log₁₀ and 20·log₁₀), add sound levels logarithmically, subtract background noise, and convert dBm, dBW and watts.