Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Cosmological Redshift Calculator

Computes cosmological redshift, recession velocity, comoving distance, or the Hubble time from redshift z and the Hubble constant. Ideal for astronomy students and researchers analyzing galaxy observations.

Redshift (z)

Hubble Constant (km/s/Mpc)

Calculate

Fill in the required fields to see your result.

Relativity

Gravitational Redshift Calculator

Compute the observed frequency of light or electromagnetic radiation emitted near a massive object, accounting for gravitational redshift predicted by General Relativity. Essential for astrophysics, pulsar timing, and GPS system design.

Source Frequency (Hz)

Gravitational Potential Difference (m²/s²)

Speed of Light (m/s)

Gravitational Scenario

Fill in the required fields to see your result.

Key differences

	Cosmological Redshift Calculator	Gravitational Redshift Calculator
Category	Relativity	Relativity
Inputs required	3	4
Result	Calculated Value (Mpc)	Observed Frequency (Hz)
What it does	Computes cosmological redshift, recession velocity, comoving distance, or the Hubble time from redshift z and the Hubble constant. Ideal for astronomy students and researchers analyzing galaxy observations.	Compute the observed frequency of light or electromagnetic radiation emitted near a massive object, accounting for gravitational redshift predicted by General Relativity. Essential for astrophysics, pulsar timing, and GPS system design.