- 1Enter the duration value.
- 2Select your source unit (seconds, minutes, hours, days, weeks, months, years, milliseconds).
- 3Select your target unit to view the converted duration.
Time conversion translates temporal durations across standard sexagesimal units (seconds, minutes, hours) and calendar units (days, weeks, months, years).
Sexagesimal and daily scaling factors.
1 min = 60 s | 1 hour = 3,600 s | 1 day = 86,400 sAverage Gregorian calendar factors.
1 week = 7 days = 604,800 s | 1 year = 365.2425 days average24 h × 3,600 s/h = 86,400 s3 × 3600 s ÷ 60 s/min1 × 31,556,952 s ÷ 86,400 s/day- Average Month & Year Factors: Conversion models use standard average calendar factors (30.4375 days/month, 365.2425 days/year) for non-specific durations.
- Sexagesimal Base: Seconds, minutes, and hours use a base-60 numbering system derived from ancient astronomy.
- For exact calendar spans between real dates, use the Date Difference or Age calculator instead — this converter uses average month and year lengths.
How many seconds are in a full 24-hour day?
There are exactly 86,400 seconds in 1 day (24 hours × 60 minutes × 60 seconds).
How are months calculated in general time conversion?
Standard time converters use the average Gregorian month length of 30.4375 days (365.2425 days / 12 months).
How does the time conversion work internally?
Every unit has a fixed factor to a base unit. The calculator multiplies your value by the source unit's factor to reach the base, then divides by the target unit's factor.
How long are a month and a year here?
A month is defined as 2,629,746 seconds and a year as 31,556,952 seconds (the average Gregorian year of 365.2425 days), so results use average lengths rather than a specific calendar month.