# Calculator (version 2010)

Welcome to *K*-corrections calculator, simple
service allowing one to determine
*K*-corrections of a galaxy, given its redshift and
one or more colours. Please fill the form below with a following steps:
(1) choose a filter for which you want to calculate
*K*-correction; (2) enter galaxy redshift; (3) then
select input colour (if there is a choice); (4) enter colour
value; (5) press "Calculate" or hit Enter (be sure that you have
JavaScript enabled in your browser). System will
produce a *K*-correction for the filter you specified and 2 formulae
for manual calculation of the requested *K*-correction for given redshift and colour
correspondingly, printed in the bottom panel.
Please note that galaxy redshift should stay in the range between 0.0 and 0.5.

You can learn about algorithms used for
calculation or how to acknowledge this service in
the About section. If you need
bulk *K*-corrections calculation, please
consider using the code for popular data languages
published in Get the code section.