Save time calculating your billable hours by using this handy conversion chart. It was modeled after http://www.p1m.com/unit.htm and placed here to ensure I could locate it at a later date in case it is ever removed from that site.
| 1 | = | 0.017 | 21 | = | 0.350 | 41 | = | 0.683 | ||
| 2 | = | 0.033 | 22 | = | 0.357 | 42 | = | 0.700 | ||
| 3 | = | 0.050 | 23 | = | 0.383 | 43 | = | 0.717 | ||
| 4 | = | 0.067 | 24 | = | 0.400 | 44 | = | 0.733 | ||
| 5 | = | 0.083 | 25 | = | 0.417 | 45 | = | 0.750 | ||
| 6 | = | 0.100 | 26 | = | 0.433 | 46 | = | 0.767 | ||
| 7 | = | 0.117 | 27 | = | 0.450 | 47 | = | 0.783 | ||
| 8 | = | 0.133 | 28 | = | 0.467 | 48 | = | 0.800 | ||
| 9 | = | 0.150 | 29 | = | 0.483 | 49 | = | 0.817 | ||
| 10 | = | 0.167 | 30 | = | 0.500 | 50 | = | 0.833 | ||
| 11 | = | 0.183 | 31 | = | 0.517 | 51 | = | 0.850 | ||
| 12 | = | 0.200 | 32 | = | 0.533 | 52 | = | 0.867 | ||
| 13 | = | 0.217 | 33 | = | 0.550 | 53 | = | 0.883 | ||
| 14 | = | 0.233 | 34 | = | 0.567 | 54 | = | 0.900 | ||
| 15 | = | 0.250 | 35 | = | 0.583 | 55 | = | 0.917 | ||
| 16 | = | 0.267 | 36 | = | 0.600 | 56 | = | 0.933 | ||
| 17 | = | 0.283 | 37 | = | 0.617 | 57 | = | 0.950 | ||
| 18 | = | 0.300 | 38 | = | 0.633 | 58 | = | 0.967 | ||
| 19 | = | 0.317 | 39 | = | 0.650 | 59 | = | 0.983 | ||
| 20 | = | 0.333 | 40 | = | 0.667 | 60 | = | 1.000 |
Here is the same formula in a PHP for loop. It’s simply (1 / 60) * minutes.
for (var $i = 1; $i <= 60; $i++) {
$d = ($i / 60) * $i;
echo "{$i} = {$d}\n";
}