Science & Physics calculators.
Velocity, force, energy, unit conversions, and other physics and chemistry calculators for the curious and the studious.
Ohm's Law Calculator
Solve V = IR for voltage, current, or resistance — and compute power (P = VI, I²R, V²/R) simultaneously. Supports SI prefix output (mA, kΩ, µW).
Speed Calculator
Solve speed = distance ÷ time for any unknown with km, m, mi, ft distance units and hours, minutes, seconds time units — plus a 4-unit speed conversion panel.
Kinetic Energy Calculator
Calculate KE = ½mv² from mass and velocity with metric or imperial units — results in J, kJ, and kWh, plus momentum (p = mv) as a bonus output.
Density Calculator
Solve ρ = m ÷ V for density, mass, or volume — supports kg, g, lb, oz for mass and m³, cm³/mL, litres, ft³ for volume with instant unit conversions.
Half-Life Calculator
Find remaining quantity, decayed amount, number of half-lives elapsed, and decay constant using N(t) = N₀ × (½)^(t/t½). Supports any time unit from seconds to years.