XF 2.2 How can I calculate this inside a template?

[grantus]

Inside my template I need to calculate a time from my db table (in UNIX format) then divide a value, minus the current time, and then format it.

For example:

({$item.end_date} / 60) - {$xf.time}

Is $xf.time already in UNIX format?

 

[stromb0li]

{{($item.end_date / 60) - $xf.time}}