Time Calculator

Hours between two times · Add time · Subtract time · 12hr & 24hr formats

Enter 12-hour (9:30 AM) or 24-hour (17:30) format

Quick examples

9:00 AM → 5:30 PM
8 hrs 30 mins
8:45 AM → 12:00 PM
3 hrs 15 mins
9:00 PM → 6:00 AM
9 hrs (overnight)
7:30 AM → 7:30 PM
12 hrs exactly

Common Work Schedule Calculations

Shift Hours Common In
9:00 AM – 5:00 PM 8 hrs Standard US/UK office shift
9:00 AM – 5:30 PM 8 hrs 30 mins With 30-min lunch break
8:00 AM – 4:00 PM 8 hrs Early shift
10:00 PM – 6:00 AM 8 hrs (overnight) Night shift — crosses midnight
7:00 AM – 7:00 PM 12 hrs US hospital/healthcare shifts
6:00 AM – 6:00 PM 12 hrs Manufacturing / factory shifts

🌍 Work Hours by Country

Legal maximum weekly hours vary significantly:

🇺🇸 US
40 hrs/week
FLSA standard
🇬🇧 UK
48 hrs/week
Working Time Directive (opt-out available)
🇩🇪 Germany
48 hrs/week
8 hrs/day max by law
🇫🇷 France
35 hrs/week
Famously short workweek
🇯🇵 Japan
40 hrs/week
60-hr cap inc. overtime
🇦🇺 Australia
38 hrs/week
NES standard