Relativity Calculators

Relativity calculators provide essential tools for analyzing special relativistic effects, time dilation, length contraction, and relativistic energy. These advanced physics calculators help students and researchers solve problems involving high-velocity motion, relativistic mechanics, and spacetime transformations. From basic time dilation to complex relativistic energy calculations, these tools simplify Einstein’s special relativity concepts and computations.

Calculate Lorentz factors, relativistic masses, velocity additions, and twin paradox time differences with precision. Each relativity formula calculator follows fundamental principles of special relativity for high-speed motion, making it easier to understand relativistic effects and solve relativity problems efficiently in educational settings.

⚠ Disclaimer: This calculator provides results based on standard formulas and simplified assumptions. It is intended for educational purposes only and should not be used for professional, medical, industrial, or experimental applications without expert verification.

Time Dilation

Proper time Δt₀ (s) Velocity v (m/s)

Length Contraction

Proper length L₀ (m) Velocity v (m/s)

Relativistic Mass

Rest mass m₀ (kg) Velocity v (m/s)

Relativistic Momentum

Rest mass m₀ (kg) Velocity v (m/s)

Relativistic Kinetic Energy

Rest mass m₀ (kg) Velocity v (m/s)

Velocity Addition

u (m/s) v (m/s)

Lorentz Factor (γ)

Velocity v (m/s)

Relativistic Doppler Effect

Source frequency f₀ (Hz) Velocity v (m/s, +towards observer)

Energy–Momentum Relation

Rest mass m₀ (kg) Momentum p (kg·m/s)

Twin Paradox Time Difference

Earth time t (y) Velocity v (m/s)