Redshift (Doppler)
Calculate Redshift (Doppler) instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Redshift (Doppler)
Recession speedkm/s
Redshift z
0.003336
More about: Redshift (Doppler)
What it calculates
The “Redshift (Doppler)” calculator computes Redshift z from 1 parameter: recession speed (km/s).
An astronomy calculation for enthusiasts and scientists.
Example calculation
With parameters Recession speed = 1,000 km/s the result is 0.0033.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.