Time to Seconds Converter
Convert HH:MM:SS time notation to total seconds, or seconds to HH:MM:SS.
Total seconds
5,400
1h × 3600 + 30m × 60 + 0s = 5,400 s
Quick examples
How HH:MM:SS to seconds conversion works
Converting between HH:MM:SS notation and raw seconds is a common task in programming, video production, and analytics. The formula is straightforward: total = hours × 3600 + minutes × 60 + seconds. This tool handles both directions — paste a time like 1:30:00 to get 5400 s, or enter seconds to get the human-readable duration.
For the opposite direction, also see Seconds to Time Converter. For longer date ranges, use the Time Duration Calculator.
Private & free — this tool runs entirely in your browser.
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