Finding the gap between two clock times
Subtracting one clock time from another looks simple until the times don't line up on clean hour boundaries — time doesn't carry in base 10, it carries in base 60, so 9:45 to 11:20 isn't just "11.20 minus 9.45."
9:45 to 11:20 → borrow 60 minutes from the hour
11:20 = 10:80 → 10:80 − 9:45 = 1 hour 35 minutes
That borrowing step is exactly where manual time math goes wrong most often — this calculator's Time Difference mode does the borrowing automatically and shows the working, so it's easy to see where each figure came from.
Sumar i restar a mitjanit
A clock resets to 0:00 every 24 hours, but elapsed time doesn't care about that reset — a shift or trip that starts at 22:00 and runs 9 hours ends at 7:00 the next morning, not at a nonsensical "31:00." The Add/Subtract mode here handles that wraparound automatically: add the hours and minutes, then loop back to 0:00 (and roll the day count forward) whenever the total reaches 24:00. It's the same logic used for overnight shift scheduling, flight arrival times, or any calculation that starts on one day and lands on the next.
Per què l'hora decimal i l'hora del rellotge necessiten una conversió separada
45 minutes looks like "0.45" if you're not careful, but it's actually 0.75 of an hour — the base-60 to base-10 switch trips people up constantly, especially anywhere billing or payroll is involved.
Decimal hours = Hours + (Minutes ÷ 60)
1 hour 45 minutes = 1 + (45 ÷ 60) = 1.75 hours
El mode Converteix unitats es mou directament entre segons, minuts, hores, dies i setmanes, que cobreix aquesta conversió juntament amb el cas més general de convertir qualsevol durada en la unitat que vulgui un formulari, full de càlcul o factura.
More specialized time tools
For payroll specifically — regular hours, overtime, and a full weekly timecard — the calculadora de targetes de tempsi elcalculadora d'hores go deeper than this general-purpose tool. For measuring how long a single event, task, or activity lasted, the time duration calculator is built specifically for that.