Time to Seconds Converter
Convert time formats like HH:MM:SS, 1h30m, 2d to total seconds instantly. Free online calculator with live results.
What time formats does this converter support?
It supports HH:MM:SS (e.g., 1:30:45), shorthand with unit letters (1h30m45s, 2d5h), and single-unit values (90m, 2h, 3d). Spaces between units are optional.
How do I convert hours to seconds?
Enter the hours value with the 'h' suffix (e.g., 2h) or use HH:MM:SS format (e.g., 2:00:00). The formula is: seconds = hours × 3600.
How do I convert minutes to seconds?
Enter the minutes with 'm' suffix (e.g., 45m) or use 00:45:00 format. The formula is: seconds = minutes × 60.
Can I convert days to seconds?
Yes. Use the 'd' suffix (e.g., 3d for 3 days). The formula is: seconds = days × 86400.
What is the formula for time to seconds conversion?
1 hour = 3,600 seconds; 1 minute = 60 seconds; 1 day = 86,400 seconds. Combine them: H×3600 + M×60 + S = total seconds.
Is this tool free to use?
Yes, completely free with no sign-up required. There are no usage limits or hidden fees.
Does it work offline?
Yes. Once the page loads, all calculations happen locally in your browser. No internet connection is needed after initial load.
Is my data safe?
Absolutely. All processing happens locally in your browser. No data is sent to any server.
What are common use cases for this converter?
Video editing timelines, workout interval timers, programming countdowns, scientific experiments, project time tracking, and cooking timers.
Why convert time to seconds?
Seconds are the SI base unit of time. Converting to seconds simplifies calculations in physics, programming, and engineering where uniform units are essential.
How to Use Time to Seconds Converter
Convert any duration like 02:30:45, 1h30m or 2d into total seconds instantly. The converter runs entirely in your browser, so nothing you type leaves your device.
- Type a duration in any supported format, such as 02:30:45, 1h30m, or 2d.
- The total number of seconds appears immediately and updates live while you type.
- Mix units in one expression, for example 1d 2h 15m 30s, and they are added up correctly.
- Copy the seconds value from the result for use in configs, scripts, or cron expressions.
No button press is needed: the result recalculates on every keystroke, so you can paste a value straight from a log or config file.
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