Accepted Duration Formats
- HH:MM:SS (e.g., 02:14:36)
- H:MM (e.g., 1:30 for 1 hour 30 minutes)
- 1h 20m 15s (spaces optional, order flexible: 20m 1h also works)
- Minutes-only (e.g., 45m) or Seconds-only (e.g., 30s)
How Duration to Seconds Works
The tool parses your input and converts everything to total seconds. For example, 1h 20m 15s becomes (1 × 3600) + (20 × 60) + 15.
Frequently Asked Questions
What if I omit hours?
5:30 is interpreted as H:MM (5 hours, 30 minutes). If you want minutes-only, use 5m 30s or 330s.
Does 00:00:00 work?
Yes. It returns 0 seconds.
Is it free?
Yes. It runs directly in your browser.
Related Time Converters
Need a more specific conversion or formatting? Try one of these focused tools:
Seconds to Minutes
Convert seconds to minutes (decimal + human format + HH:MM:SS) with quick presets.
Minutes to Hours
Perfect for payroll & workouts: decimal hours + X hours Y minutes + total seconds.
Hours to Days
Project planning: days (decimal) + X days Y hours + totals in minutes/seconds.
Days to Weeks
Convert days to weeks with remainder days and total hours.
Weeks to Days
Calendar planning: weeks → days with totals in hours/minutes/seconds.
Milliseconds to Seconds
Dev/perf timing: seconds + HH:MM:SS + total minutes (step buttons included).
Seconds to HH:MM:SS
Formatting tool: seconds → 02:14:36 + 2h 14m 36s, plus total minutes and decimal hours.
Unix Timestamp Converter
Unix ↔ Date with UTC/Local/ISO/RFC outputs and auto-detect ms vs seconds.
Time Zone Converter
Global scheduling: convert date/time between timezones with offset difference and DST indicator.