⚡ Ohm's Law Calculator
Calculate voltage, current, resistance, or power. Enter any two values to solve for the rest.
V = I × R | P = V × I
🚀 Force, Mass & Acceleration
Newton's Second Law — solve for force, mass, or acceleration.
F = m × a
💨 Kinetic Energy Calculator
Calculate kinetic energy from mass and velocity. Also solves for mass or velocity.
KE = ½ × m × v²
🧱 Density Calculator
Solve for density, mass, or volume. Includes comparison to common materials.
ρ = m / V
🧪 Chemistry Calculators
🧪 pH Calculator
Convert between pH, hydrogen ion concentration [H⁺], and pOH. Classify acid/base/neutral.
pH = -log₁₀[H⁺]
☢️ Half-Life Calculator
Calculate remaining substance after radioactive decay, or find the decay constant or half-life.
N(t) = N₀ × (½)^(t/t½)
🔊 Speed of Sound Calculator
Calculate the speed of sound in air at any temperature. Also computes Mach number.
v = 331.3 × √(1 + T/273.15) m/s
🌊 Wavelength & Frequency
Solve for wavelength, frequency, or wave speed using the wave equation.
v = f × λ