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

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.

Relativity

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.

Key differences

	Gravitational Redshift Calculator	Cosmological Redshift Calculator
Category	Relativity	Relativity
Inputs required	4	3
Result	Observed Frequency (Hz)	Calculated Value (Mpc)
What it does	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.	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.