Calculate the cosmological redshift of light from a distant galaxy based on its recession velocity. Redshift indicates how much the universe has expanded since the light was emitted.
Enter your values below
Velocity of the receding object
Measured wavelength of the spectral line
Rest wavelength of the spectral line
How this calculator works
Redshift equals the change in wavelength divided by the emitted wavelength, approximately equal to velocity over speed of light for small z.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
