Get hours and minutes from decimal time

Split decimal hours into whole hours and whole minutes.

JavaScript Version 1.0.0 · MIT · .md

function hoursAndMinutes(value) { return [Math.floor(value), Math.floor((value * 60) % 60)]; }

Input & expected output

1.5

[
  1,
  30
]

The edge case

2.999

[
  2,
  59
]

Know the limits

• Minutes are floored, not rounded, as the edge case shows. The lab accepts 0 or more hours.

The function above is the implementation used by the lab. The lab validates JSON types and caps size before execution; include equivalent validation when accepting untrusted input in your application.

Keep exploring

• Compare two dates — Compare validated ISO calendar dates in UTC and return -1, 0 or 1.
• Add AM PM suffix to an hour — Turn an hour from 0 to 23 into a 12-hour label with am or pm.
• Calculate the number of days between two dates — Count whole calendar days between two YYYY-MM-DD dates.