Online Astronomy Calculators

Are your observations capable of wide-field imaging?

Try my wide-field VLBI calculator to find out what may limit your field of view.

Need to Make a quick estimate of a distance based on a redshift of recessional velocity?

Try one of my redshift/distance calculators to get an instant answer.

Need to work out the size of an object based on its distance and angular size?

Try the spatial size calcularor to get an instant answer.