Can I add seconds as well?

Yes. Toggle the seconds column to add seconds to each entry. The calculator handles carrying over from seconds to minutes and minutes to hours automatically.

How many time entries can I add?

You can add up to 20 rows. Use the Add Row button to insert more, or the × button to remove a row. The total updates instantly as you type.

Can I email or print my results?

Yes. The Print button generates a clean printable summary. The Email button opens your default email client with the results pre-filled, ready to send.

Time Adder — Add Hours, Minutes & Seconds Calculator

How to use the time adder

Enter hours and minutes for each time entry you want to add. The calculator updates instantly. To track seconds as well, toggle "Include seconds" at the top of the calculator.

Common use cases

Time tracking — summing time spent on multiple tasks or projects
Athletic training — adding lap times, set durations, or workout segments
Cooking — total prep + cook + rest time for a recipe
Music and audio — total runtime of multiple tracks or recording segments
Study sessions — total study time across multiple sittings
Billable hours — quick sum of time entries from a timer or notebook
Travel planning — adding flight, drive, and layover durations

How time addition works

The math is straightforward but easy to get wrong manually. When seconds exceed 60, carry to minutes. When minutes exceed 60, carry to hours.

Example

1:30:25 + 2:45:55
Add seconds: 25 + 55 = 80. Since 80 ≥ 60, carry: 80 − 60 = 20 seconds, add 1 to minutes.
Add minutes: 30 + 45 + 1 = 76. Since 76 ≥ 60, carry: 76 − 60 = 16 minutes, add 1 to hours.
Add hours: 1 + 2 + 1 = 4.
Total: 4:16:20

Time adder vs. hours calculator

These two tools solve different problems:

Tool	Input	Best for
Time Adder	Raw durations (HH:MM)	Task tracking, recipe times, training intervals
Hours Calculator	Start and end times (e.g., 9 AM to 5 PM)	Work hours, timesheets, payroll
Time Card	Multiple punch in/out pairs per day	Split shifts, retail, multiple sessions
Time Between Dates	Two calendar dates	Project deadlines, billing periods

Converting between time formats

If your input is in decimal hours (like a timer output: 1.75), convert before entering: multiply the decimal part by 60. So 1.75 hours = 1 hour 45 minutes. For the reverse, our Hours Calculator has a built-in Decimal tab.

Decimal	HH:MM	Decimal	HH:MM
0.25	0:15	1.50	1:30
0.33	0:20	1.75	1:45
0.50	0:30	2.00	2:00
0.75	0:45	2.50	2:30
1.00	1:00	3.25	3:15
1.25	1:15	8.75	8:45

Questions, answered

Things people actually ask.

Enter each time duration in the hours and minutes fields. The calculator sums them all and shows the total in both HH:MM:SS format and decimal hours. For example, 1:30 + 2:45 + 0:15 = 4:30, or 4.50 decimal hours.

The Hours Calculator works with start and end times (e.g., 9:00 AM to 5:00 PM). The Time Adder works with raw time durations (e.g., 1:30 worked on Task A, 2:15 on Task B). Use the Time Adder when you already know each duration and just want to sum them.

Yes. Toggle the "Include seconds" checkbox at the top of the calculator. The seconds column appears for each row, and the calculator handles carrying over from seconds to minutes and minutes to hours automatically.

Up to 20 rows. Use the Add Row button to insert more, or the × button on any row to remove it. The total updates instantly as you type — no need to press a calculate button.

Yes. The Print button generates a clean printable summary (also useful for saving as PDF). The Email button opens your default email client with the results pre-filled, ready to send to yourself or anyone else.

Multiply the decimal portion by 60. So 1.75 hours = 1 hour and 0.75 × 60 = 45 minutes = 1:45. For full bidirectional conversion, use the Decimal tab on the Hours Calculator.