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Free time calculator. Add or subtract hours, minutes, and seconds. Calculate duration between two times.
Add or subtract time, or find the difference between two times.
The time calculator adds and subtracts hours, minutes, and seconds, and finds the duration between two specific times. It handles arithmetic across midnight and across days without needing manual conversions.
Hourly workers totaling shifts and overtime, project managers tracking billable time, and athletes summing training durations. It is equally useful for cooks, broadcasters, and anyone planning a tightly scheduled day.
It removes the awkwardness of base-60 arithmetic, where 45 plus 30 minutes does not behave like ordinary addition. It also avoids the off-by-one errors common when totaling several time entries by hand.
It answers questions like "How many hours and minutes did I work this week?", "What is the duration between 8:45 AM and 5:20 PM?", and "If I add three hours and forty-five minutes to 11:30, what time is it?"