A walkthrough, end to end.
- 1
Enter a start and end time (24-hour format).
- 2
Optionally subtract break minutes.
- 3
See total hours as decimal and as h:mm.
Time arithmetic
Convert each time to total minutes from midnight, subtract, and account for crossing midnight by adding 24 hours when end is earlier than start.
What you can do with this.
Daily timesheet
Log clock-in to clock-out with a 30-minute lunch break.
Freelance billing
Compute billable hours from start/end times.
Shift planning
Verify shift length including breaks.
Overtime check
See if hours exceed standard shift length.
Meeting duration
Quickly check how long a meeting ran.
Payroll math
Cross-check hours before submitting to payroll.
Cross-midnight shifts
Calculator handles overnight shifts cleanly.
Hours 2026 — what's current
Standard timekeeping math; calculator wins for instant decimal hours.
Frequently asked.
Yes — if end < start, the calculator adds 24 hours automatically.
Both decimal (7.5 h) and h:mm (7:30) forms are shown.
No. Calculations run in your browser.
Sum them in the break-minutes field.