Relativity Calculators — Physics
Explore special and general relativity with tools that show the math. The Lorentz factor calculator underpins the time dilation and length contraction tools for objects near light speed, the relativistic energy and Doppler calculators handle mass-energy and frequency shifts, and the gravitational redshift and aberration tools cover light in strong fields and fast frames. Each displays the equation, making relativity’s counterintuitive results concrete and checkable.
All Relativity Calculators
Calculate gravitational redshift with inputs, formulas, and instant results.
length contraction calculator. Get instant, accurate results.
Calculate lorentz factor with inputs, formulas, and instant results.
Calculate relativistic aberration with inputs, formulas, and instant results.
Calculate relativistic doppler with inputs, formulas, and instant results.
relativistic energy calculator. Get instant, accurate results.
Calculate time dilation with inputs, formulas, and instant results.
About Relativity Calculators
Explore special and general relativity with tools that show the math. The Lorentz factor calculator underpins the time dilation and length contraction tools for objects near light speed, the relativistic energy and Doppler calculators handle mass-energy and frequency shifts, and the gravitational redshift and aberration tools cover light in strong fields and fast frames. Each displays the equation, making relativity’s counterintuitive results concrete and checkable.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common relativity scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 7tools: Gravitational Redshift Calculator, Length Contraction Calculator, Lorentz Factor Calculator, Relativistic Aberration Calculator, Relativistic Doppler Calculator, Relativistic Energy Calculator, Time Dilation Calculator. Each calculator is free to use with no signup required.