Physics Calculators

Physics calculators for mechanics, optics, electricity, thermodynamics, and many applied science topics.

Speed & Acceleration

0-60 Acceleration Calculator The 0-60 calculator works out the average acceleration of a vehicle that goes from a standstill to a chosen speed in a given time. Enter the 0-60 time (in seconds) and the speed reached (in mph) and you get the average acceleration in metres per second squared. It is handy for comparing the launch performance of cars or for physics homework on uniform acceleration.

Rotational Motion

Angular Velocity Calculator The Angular Velocity Calculator converts a rotational speed in RPM into angular velocity, then uses the radius to find tangential speed and centripetal acceleration. The formula used is: ω = RPM × 2π/60; v = ω × r; a_c = ω² × r.

Automotive

Compression Ratio Calculator The Compression Ratio Calculator finds an engine's compression ratio from the cylinder (swept) volume and the clearance (combustion chamber) volume. Compression Ratio to PSI Calculator The Compression Ratio to PSI Calculator estimates an engine's cranking compression pressure from its compression ratio using a polytropic approximation. Enter the compression ratio.

Thermodynamics

Heat Energy Calculator (Q = mcΔT) Calculate the heat energy needed to change a substance's temperature. Enter the mass, the material's specific heat capacity, and the temperature change, and this calculator applies Q = mcΔT to give the energy in joules.

Rotational Dynamics

Moment of Inertia Calculate moment of inertia (rotational resistance). Formula: I = Σ(m_i × r_i²). For uniform disk: I = 0.5MR²; uniform rod: I = (1/12)ML²

Nuclear

Radioactive Half-Life Calculator Calculate remaining mass after N half-lives. Mass = Initial × (0.5)^N.