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.