How do you add time durations?

To add time: add seconds, carry over to minutes (every 60 seconds = 1 minute), then carry over to hours (every 60 minutes = 1 hour). Example: 1:45:30 + 0:30:45 = 1:75:75 = 1:76:15 = 2:16:15. This calculator handles all the carries automatically.

How many hours are in a work week?

A standard US work week is 40 hours (8 hours × 5 days). A part-time schedule is typically 20–30 hours. Salaried employees often work 45–50 hours. Over a year (52 weeks): 40 hrs × 52 = 2,080 work hours at standard full-time.

How do I calculate overtime hours?

Overtime in the US (under FLSA) is any hours worked over 40 per week, paid at 1.5× the regular rate. To find overtime hours: enter all daily hours (Mon–Sun) as separate entries in this calculator. If the total exceeds 40:00:00, the difference is overtime. Example: 42:30:00 total − 40:00:00 = 2:30:00 overtime (2.5 hours at 1.5× rate).

Time Calculator

Add or subtract time durations in H:MM:SS format. Useful for work hours, video editing, project logging, and billing time sheets.

⏰ Time Entries (H:MM:SS or H:MM)

Time (H:MM:SS)	Operation
	(first entry)

Format: H:MM:SS, H:MM, or decimal hours (1.5 = 1:30:00)

🔢 Common Time Reference Table

Duration	Hours	Minutes	Seconds
1 minute	0:01:00	1	60
1 hour	1:00:00	60	3,600
Work day (8 hrs)	8:00:00	480	28,800
Work week (40 hrs)	40:00:00	2,400	144,000
1 day	24:00:00	1,440	86,400
1 week	168:00:00	10,080	604,800

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Time Calculator

⏰ Time Entries (H:MM:SS or H:MM)

🔢 Common Time Reference Table

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