Hubble Law Distance Calculator

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Estimates the distance to galaxies based on their redshift (recessional velocity) using Hubble's constant.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Recessional Velocity (km/s) and Hubble's Constant (km/s/Mpc) in the units shown.

Step 2

Read Distance (Mpc) and Distance (Light Years) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Recessional Velocity (km/s): 500 km/s; Hubble's Constant (km/s/Mpc): 70 km/s/Mpc

Distance (Mpc): 7.142857143 Mpc; Distance (Light Years): 23,285,714.29 light years

Recessional Velocity (km/s): 5,000 km/s; Hubble's Constant (km/s/Mpc): 70 km/s/Mpc

Distance (Mpc): 71.42857143 Mpc; Distance (Light Years): 232,857,142.9 light years

Recessional Velocity (km/s): 15,000 km/s; Hubble's Constant (km/s/Mpc): 70 km/s/Mpc

Distance (Mpc): 214.2857143 Mpc; Distance (Light Years): 698,571,428.6 light years

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