Physics Calculators

Solve any of V, I, R and get power automatically.

Newton's second law: F = m × a.

Kinetic energy from mass and velocity.

Gravitational potential energy at any height.

Density from mass and volume (ρ = m/V).

Linear momentum p = m × v.

Range, max height and flight time for a projectile.

Speed of a wave from frequency and wavelength.

τ = r × F × sin(θ) for rotational systems.

Acceleration from change in velocity over time.

Electrostatic force between two point charges.

Spring force from stiffness and displacement.

Small-angle pendulum period from length and gravity.

Average velocity from distance and time.

Mass from Newton's second law, m = F/a.

Mass from density and volume, m = ρ × V.

Weight from mass and gravity, W = mg.

Impulse from force and time, J = F × t.

Kinetic + potential energy of a moving mass.

Work done by a force over a distance.

Power from work and time, P = W/t.

Pressure from force and area, P = F/A.

Buoyant force via Archimedes' principle.

Absolute pressure at depth including atmosphere.

Gauge pressure at depth in a fluid.

Heat energy from mass, specific heat and ΔT.

Specific heat capacity solved from Q = mcΔT.

Linear expansion of a material with temperature.

Solve P₁V₁ = P₂V₂ for any unknown.

Solve V₁/T₁ = V₂/T₂ for any unknown.

Voltage from current and resistance, V = IR.

Current from voltage and resistance, I = V/R.

Resistance from voltage and current, R = V/I.

Solve any two of V, I, R, P for the rest.

Energy consumed in kWh from power and hours.

Capacitance from charge and voltage, C = Q/V.

Inductance and stored energy from V = L·dI/dt.

Capacitive or inductive reactance at a frequency.

RLC series impedance from R, XL and Xc.

Frequency from period or wave speed/wavelength.

Wavelength from wave speed and frequency.

Observed frequency shift from relative motion.

Photon energy from Planck's relation.

A particle's de Broglie wavelength.

Relativistic time dilation at high velocity.

Relativistic length contraction at high velocity.