util-units.php

<?php

//DistanceUnits
$km=0.001;
$mi=0.000621371;
$nmi=0.000539957;

//SpeedUnits
$kn=1;
$kmh=1.852;
$mph=1.15078;

//Timeunits
$second=60;
$minute=1;
$hour=3600;

?>