Duration 1
Duration 2
Result
0h 0m 0s
Total Seconds0
Decimal Minutes0.00
How to Use This Calculator
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- Enter Duration 1: Fill in hours, minutes and seconds for your first time value.
- Choose an operator: Select "+" to add or "−" to subtract the second duration.
- Enter Duration 2: Fill in the second time value the same way.
- Read the result: The total updates live and is also shown in total seconds and decimal minutes — useful for payroll, billing or timesheets.
- Copy or reset: Tap "Copy Result" to paste it anywhere, or "Reset" to start over.
Free Time Duration Calculator — Add & Subtract Hours, Minutes, Seconds
Quickly add or subtract time durations without doing the math yourself. This free online tool handles hours, minutes and seconds together, and instantly converts the result into total seconds and decimal minutes — perfect for freelancers logging billable hours, editors timing clips, or anyone doing quick time math.
⏱ Live, Real-Time Calculation
Results update as you type — no need to press a button every time, though the Calculate button is there if you prefer.
🔢 Multiple Output Formats
Get your result in the classic h:m:s format, as a raw total in seconds, and as decimal minutes — useful when exporting to spreadsheets or invoicing software.
📋 One-Tap Copy
Copy your result to the clipboard instantly to paste it directly into an invoice, timesheet or email.
How do I add two time durations together?
Enter the hours, minutes and seconds for both durations, select the plus operator, and the total is calculated instantly as you type.
Can this calculator subtract time?
Yes, select the minus operator to subtract the second duration from the first. The result never goes below zero.
Does it show the result in seconds or decimal minutes?
Yes, alongside the hours:minutes:seconds format, the tool also shows the total in seconds and in decimal minutes.
Is this time calculator free to use?
Yes, it is completely free with no registration or installation required.